LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
* [PATCH 0/2] mm, thp: fix file-backed THP race in collapse_file
@ 2021-09-06 12:11 Rongwei Wang
  2021-09-06 12:11 ` [PATCH 1/2] mm, thp: check page mapping when truncating page cache Rongwei Wang
                   ` (6 more replies)
  0 siblings, 7 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-09-06 12:11 UTC (permalink / raw)
  To: linux-mm, linux-kernel; +Cc: akpm, cfijalkovich, song, william.kucharski, hughd

Hi,
We found two bugs related to file-backed THP in our cases, recently.
The two bugs rough description as following:

1) in truncate_inode_pages_range, subpage(s) of file-backed THP can be
revealed by find_get_entry.

2) 'collapse_file' miss the pages which in writeback but no private.
This situation will be triggered in XFS when block size is set to
PAGESIZE.

These two patchs mainly fix the above mentioned bugs, and have been
tested in latest branch.

Rongwei Wang (2):
  mm, thp: check page mapping when truncating page cache
  mm, thp: bail out early in collapse_file for writeback page

 mm/filemap.c    |  7 ++++++-
 mm/khugepaged.c |  3 ++-
 mm/truncate.c   | 17 ++++++++++++++++-
 3 files changed, 24 insertions(+), 3 deletions(-)

-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 61+ messages in thread

* [PATCH 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-06 12:11 [PATCH 0/2] mm, thp: fix file-backed THP race in collapse_file Rongwei Wang
@ 2021-09-06 12:11 ` Rongwei Wang
  2021-09-07  2:49   ` Yu Xu
                     ` (2 more replies)
  2021-09-06 12:12 ` [PATCH 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
                   ` (5 subsequent siblings)
  6 siblings, 3 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-09-06 12:11 UTC (permalink / raw)
  To: linux-mm, linux-kernel; +Cc: akpm, cfijalkovich, song, william.kucharski, hughd

Transparent huge page has supported read-only non-shmem files. The file-
backed THP is collapsed by khugepaged and truncated when written (for
shared libraries).

However, there is race in two possible places.

1) multiple writers truncate the same page cache concurrently;
2) collapse_file rolls back when writer truncates the page cache;

In both cases, subpage(s) of file THP can be revealed by find_get_entry
in truncate_inode_pages_range, which will trigger PageTail BUG_ON in
truncate_inode_page, as follows.

[40326.247034] page:000000009e420ff2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x7ff pfn:0x50c3ff
[40326.247041] head:0000000075ff816d order:9 compound_mapcount:0 compound_pincount:0
[40326.247046] flags: 0x37fffe0000010815(locked|uptodate|lru|arch_1|head)
[40326.247051] raw: 37fffe0000000000 fffffe0013108001 dead000000000122 dead000000000400
[40326.247053] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
[40326.247055] head: 37fffe0000010815 fffffe001066bd48 ffff000404183c20 0000000000000000
[40326.247057] head: 0000000000000600 0000000000000000 00000001ffffffff ffff000c0345a000
[40326.247058] page dumped because: VM_BUG_ON_PAGE(PageTail(page))
[40326.247077] ------------[ cut here ]------------
[40326.247080] kernel BUG at mm/truncate.c:213!
[40326.280581] Internal error: Oops - BUG: 0 [#1] SMP
[40326.281077] Modules linked in: xfs(E) libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) cryptd(E) aes_ce_cipher(E) crct10dif_ce(E) ghash_ce(E) sha1_ce(E) uio_pdrv_genirq(E) uio(E) nfsd(E) vfat(E) fat(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) sch_fq_codel(E) ip_tables(E) ext4(E) mbcache(E) jbd2(E) virtio_net(E) net_failover(E) virtio_blk(E) failover(E) sha2_ce(E) sha256_arm64(E) virtio_mmio(E) virtio_pci(E) virtio_ring(E) virtio(E)
[40326.285130] CPU: 14 PID: 11394 Comm: check_madvise_d Kdump: loaded Tainted: G        W   E     5.10.46-hugetext+ #55
[40326.286202] Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS 0.0.0 02/06/2015
[40326.286968] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
[40326.287584] pc : truncate_inode_page+0x64/0x70
[40326.288040] lr : truncate_inode_page+0x64/0x70
[40326.288498] sp : ffff80001b60b900
[40326.288837] x29: ffff80001b60b900 x28: 00000000000007ff
[40326.289377] x27: ffff80001b60b9a0 x26: 0000000000000000
[40326.289943] x25: 000000000000000f x24: ffff80001b60b9a0
[40326.290485] x23: ffff80001b60ba18 x22: ffff0001e0999ea8
[40326.291027] x21: ffff0000c21db300 x20: ffffffffffffffff
[40326.291566] x19: fffffe001310ffc0 x18: 0000000000000020
[40326.292106] x17: 0000000000000000 x16: 0000000000000000
[40326.292655] x15: ffff0000c21db960 x14: 3030306666666620
[40326.293197] x13: 6666666666666666 x12: 3130303030303030
[40326.293746] x11: ffff8000117b69b8 x10: 00000000ffff8000
[40326.294313] x9 : ffff80001012690c x8 : 0000000000000000
[40326.294851] x7 : ffff8000114f69b8 x6 : 0000000000017ffd
[40326.295392] x5 : ffff0007fffbcbc8 x4 : ffff80001b60b5c0
[40326.295942] x3 : 0000000000000001 x2 : 0000000000000000
[40326.296497] x1 : 0000000000000000 x0 : 0000000000000000
[40326.297047] Call trace:
[40326.297304]  truncate_inode_page+0x64/0x70
[40326.297724]  truncate_inode_pages_range+0x550/0x7e4
[40326.298251]  truncate_pagecache+0x58/0x80
[40326.298662]  do_dentry_open+0x1e4/0x3c0
[40326.299052]  vfs_open+0x38/0x44
[40326.299377]  do_open+0x1f0/0x310
[40326.299709]  path_openat+0x114/0x1dc
[40326.300077]  do_filp_open+0x84/0x134
[40326.300444]  do_sys_openat2+0xbc/0x164
[40326.300825]  __arm64_sys_openat+0x74/0xc0
[40326.301236]  el0_svc_common.constprop.0+0x88/0x220
[40326.301723]  do_el0_svc+0x30/0xa0
[40326.302089]  el0_svc+0x20/0x30
[40326.302404]  el0_sync_handler+0x1a4/0x1b0
[40326.302814]  el0_sync+0x180/0x1c0
[40326.303157] Code: aa0103e0 900061e1 910ec021 9400d300 (d4210000)
[40326.303775] ---[ end trace f70cdb42cb7c2d42 ]---
[40326.304244] Kernel panic - not syncing: Oops - BUG: Fatal exception

This checks the page mapping and retries when subpage of file THP is
found, in truncate_inode_pages_range.

Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
---
 mm/filemap.c  |  7 ++++++-
 mm/truncate.c | 17 ++++++++++++++++-
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index dae481293..a3af2ec 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2093,7 +2093,6 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
 		if (!xa_is_value(page)) {
 			if (page->index < start)
 				goto put;
-			VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
 			if (page->index + thp_nr_pages(page) - 1 > end)
 				goto put;
 			if (!trylock_page(page))
@@ -2102,6 +2101,12 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
 				goto unlock;
 			VM_BUG_ON_PAGE(!thp_contains(page, xas.xa_index),
 					page);
+			/*
+			 * We can find and get head page of file THP with
+			 * non-head index. The head page should have already
+			 * be truncated with page->mapping reset to NULL.
+			 */
+			VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
 		}
 		indices[pvec->nr] = xas.xa_index;
 		if (!pagevec_add(pvec, page))
diff --git a/mm/truncate.c b/mm/truncate.c
index 714eaf1..8c59c00 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -319,7 +319,8 @@ void truncate_inode_pages_range(struct address_space *mapping,
 	index = start;
 	while (index < end && find_lock_entries(mapping, index, end - 1,
 			&pvec, indices)) {
-		index = indices[pagevec_count(&pvec) - 1] + 1;
+		index = indices[pagevec_count(&pvec) - 1] +
+			thp_nr_pages(pvec.pages[pagevec_count(&pvec) - 1]);
 		truncate_exceptional_pvec_entries(mapping, &pvec, indices);
 		for (i = 0; i < pagevec_count(&pvec); i++)
 			truncate_cleanup_page(pvec.pages[i]);
@@ -391,6 +392,20 @@ void truncate_inode_pages_range(struct address_space *mapping,
 			if (xa_is_value(page))
 				continue;
 
+			/*
+			 * Already truncated? We can find and get subpage
+			 * of file THP, of which the head page is truncated.
+			 *
+			 * In addition, another race will be avoided, where
+			 * collapse_file rolls back when writer truncates the
+			 * page cache.
+			 */
+			if (page_mapping(page) != mapping) {
+				/* Restart to make sure all gone */
+				index = start - 1;
+				continue;
+			}
+
 			lock_page(page);
 			WARN_ON(page_to_index(page) != index);
 			wait_on_page_writeback(page);
-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 61+ messages in thread

* [PATCH 2/2] mm, thp: bail out early in collapse_file for writeback page
  2021-09-06 12:11 [PATCH 0/2] mm, thp: fix file-backed THP race in collapse_file Rongwei Wang
  2021-09-06 12:11 ` [PATCH 1/2] mm, thp: check page mapping when truncating page cache Rongwei Wang
@ 2021-09-06 12:12 ` Rongwei Wang
  2021-09-07 16:56   ` Yang Shi
  2021-09-22  7:06 ` [PATCH v2 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache Rongwei Wang
                   ` (4 subsequent siblings)
  6 siblings, 1 reply; 61+ messages in thread
From: Rongwei Wang @ 2021-09-06 12:12 UTC (permalink / raw)
  To: linux-mm, linux-kernel; +Cc: akpm, cfijalkovich, song, william.kucharski, hughd

Currently collapse_file does not explicitly check PG_writeback, instead,
page_has_private and try_to_release_page are used to filter writeback
pages. This does not work for xfs with blocksize equal to or larger
than pagesize, because in such case xfs has no page->private.

This makes collapse_file bail out early for writeback page. Otherwise,
xfs end_page_writeback will panic as follows.

[ 6411.448211] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:ffff0003f88c86a8 index:0x0 pfn:0x84ef32
[ 6411.448304] aops:xfs_address_space_operations [xfs] ino:30000b7 dentry name:"libtest.so"
[ 6411.448312] flags: 0x57fffe0000008027(locked|referenced|uptodate|active|writeback)
[ 6411.448317] raw: 57fffe0000008027 ffff80001b48bc28 ffff80001b48bc28 ffff0003f88c86a8
[ 6411.448321] raw: 0000000000000000 0000000000000000 00000000ffffffff ffff0000c3e9a000
[ 6411.448324] page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u <= 127u))
[ 6411.448327] page->mem_cgroup:ffff0000c3e9a000
[ 6411.448340] ------------[ cut here ]------------
[ 6411.448343] kernel BUG at include/linux/mm.h:1212!
[ 6411.449288] Internal error: Oops - BUG: 0 [#1] SMP
[ 6411.449786] Modules linked in:
[ 6411.449790] BUG: Bad page state in process khugepaged  pfn:84ef32
[ 6411.450143]  xfs(E)
[ 6411.450459] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:0 index:0x0 pfn:0x84ef32
[ 6411.451361]  libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) cryptd(E) aes_ce_cipher(E) crct10dif_ce(E) ghash_ce(E) sha1_ce(E) uio_pdrv_genirq(E) uio(E) vfat(E) nfsd(E) fat(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) sch_fq_codel(E) ip_tables(E) ext4(E) mbcache(E) jbd2(E) virtio_net(E) net_failover(E) virtio_blk(E) failover(E) sha2_ce(E) sha256_arm64(E) virtio_mmio(E) virtio_pci(E) virtio_ring(E) virtio(E)
[ 6411.451387] CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Tainted: G        W   E
[ 6411.451389] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
[ 6411.451393] pc : end_page_writeback+0x1c0/0x214
[ 6411.451394] lr : end_page_writeback+0x1c0/0x214
[ 6411.451395] sp : ffff800011ce3cc0
[ 6411.451396] x29: ffff800011ce3cc0 x28: 0000000000000000
[ 6411.451398] x27: ffff000c04608040 x26: 0000000000000000
[ 6411.451399] x25: ffff000c04608040 x24: 0000000000001000
[ 6411.451401] x23: ffff0003f88c8530 x22: 0000000000001000
[ 6411.451403] x21: ffff0003f88c8530 x20: 0000000000000000
[ 6411.451404] x19: fffffe00201bcc80 x18: 0000000000000030
[ 6411.451406] x17: 0000000000000000 x16: 0000000000000000
[ 6411.451407] x15: ffff000c018f9760 x14: ffffffffffffffff
[ 6411.451409] x13: ffff8000119d72b0 x12: ffff8000119d6ee3
[ 6411.451410] x11: ffff8000117b69b8 x10: 00000000ffff8000
[ 6411.451412] x9 : ffff800010617534 x8 : 0000000000000000
[ 6411.451413] x7 : ffff8000114f69b8 x6 : 000000000000000f
[ 6411.451415] x5 : 0000000000000000 x4 : 0000000000000000
[ 6411.451416] x3 : 0000000000000400 x2 : 0000000000000000
[ 6411.451418] x1 : 0000000000000000 x0 : 0000000000000000
[ 6411.451420] Call trace:
[ 6411.451421]  end_page_writeback+0x1c0/0x214
[ 6411.451424]  iomap_finish_page_writeback+0x13c/0x204
[ 6411.451425]  iomap_finish_ioend+0xe8/0x19c
[ 6411.451426]  iomap_writepage_end_bio+0x38/0x50
[ 6411.451427]  bio_endio+0x168/0x1ec
[ 6411.451430]  blk_update_request+0x278/0x3f0
[ 6411.451432]  blk_mq_end_request+0x34/0x15c
[ 6411.451435]  virtblk_request_done+0x38/0x74 [virtio_blk]
[ 6411.451437]  blk_done_softirq+0xc4/0x110
[ 6411.451439]  __do_softirq+0x128/0x38c
[ 6411.451441]  __irq_exit_rcu+0x118/0x150
[ 6411.451442]  irq_exit+0x1c/0x30
[ 6411.451445]  __handle_domain_irq+0x8c/0xf0
[ 6411.451446]  gic_handle_irq+0x84/0x108
[ 6411.451447]  el1_irq+0xcc/0x180
[ 6411.451448]  arch_cpu_idle+0x18/0x40
[ 6411.451450]  default_idle_call+0x4c/0x1a0
[ 6411.451453]  cpuidle_idle_call+0x168/0x1e0
[ 6411.451454]  do_idle+0xb4/0x104
[ 6411.451455]  cpu_startup_entry+0x30/0x9c
[ 6411.451458]  secondary_start_kernel+0x104/0x180
[ 6411.451460] Code: d4210000 b0006161 910c8021 94013f4d (d4210000)
[ 6411.451462] ---[ end trace 4a88c6a074082f8c ]---
[ 6411.451464] Kernel panic - not syncing: Oops - BUG: Fatal exception in interrupt

Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
---
 mm/khugepaged.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 045cc57..529b117 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -1798,7 +1798,8 @@ static void collapse_file(struct mm_struct *mm,
 			goto out_unlock;
 		}
 
-		if (!is_shmem && PageDirty(page)) {
+		if (!is_shmem && (PageDirty(page) ||
+				  PageWriteback(page))) {
 			/*
 			 * khugepaged only works on read-only fd, so this
 			 * page is dirty because it hasn't been flushed
-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-06 12:11 ` [PATCH 1/2] mm, thp: check page mapping when truncating page cache Rongwei Wang
@ 2021-09-07  2:49   ` Yu Xu
  2021-09-07 18:08   ` Yang Shi
  2021-09-13 14:49   ` [mm, thp] 20753096b6: BUG:unable_to_handle_page_fault_for_address kernel test robot
  2 siblings, 0 replies; 61+ messages in thread
From: Yu Xu @ 2021-09-07  2:49 UTC (permalink / raw)
  To: Rongwei Wang, linux-mm, linux-kernel
  Cc: akpm, cfijalkovich, song, william.kucharski, hughd

On 9/6/21 8:11 PM, Rongwei Wang wrote:
> Transparent huge page has supported read-only non-shmem files. The file-
> backed THP is collapsed by khugepaged and truncated when written (for
> shared libraries).
> 
> However, there is race in two possible places.
> 
> 1) multiple writers truncate the same page cache concurrently;
> 2) collapse_file rolls back when writer truncates the page cache;
> 
> In both cases, subpage(s) of file THP can be revealed by find_get_entry
> in truncate_inode_pages_range, which will trigger PageTail BUG_ON in
> truncate_inode_page, as follows.
> 
> [40326.247034] page:000000009e420ff2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x7ff pfn:0x50c3ff
> [40326.247041] head:0000000075ff816d order:9 compound_mapcount:0 compound_pincount:0
> [40326.247046] flags: 0x37fffe0000010815(locked|uptodate|lru|arch_1|head)
> [40326.247051] raw: 37fffe0000000000 fffffe0013108001 dead000000000122 dead000000000400
> [40326.247053] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
> [40326.247055] head: 37fffe0000010815 fffffe001066bd48 ffff000404183c20 0000000000000000
> [40326.247057] head: 0000000000000600 0000000000000000 00000001ffffffff ffff000c0345a000
> [40326.247058] page dumped because: VM_BUG_ON_PAGE(PageTail(page))
> [40326.247077] ------------[ cut here ]------------
> [40326.247080] kernel BUG at mm/truncate.c:213!
> [40326.280581] Internal error: Oops - BUG: 0 [#1] SMP
> [40326.281077] Modules linked in: xfs(E) libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) cryptd(E) aes_ce_cipher(E) crct10dif_ce(E) ghash_ce(E) sha1_ce(E) uio_pdrv_genirq(E) uio(E) nfsd(E) vfat(E) fat(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) sch_fq_codel(E) ip_tables(E) ext4(E) mbcache(E) jbd2(E) virtio_net(E) net_failover(E) virtio_blk(E) failover(E) sha2_ce(E) sha256_arm64(E) virtio_mmio(E) virtio_pci(E) virtio_ring(E) virtio(E)
> [40326.285130] CPU: 14 PID: 11394 Comm: check_madvise_d Kdump: loaded Tainted: G        W   E     5.10.46-hugetext+ #55
> [40326.286202] Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS 0.0.0 02/06/2015
> [40326.286968] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
> [40326.287584] pc : truncate_inode_page+0x64/0x70
> [40326.288040] lr : truncate_inode_page+0x64/0x70
> [40326.288498] sp : ffff80001b60b900
> [40326.288837] x29: ffff80001b60b900 x28: 00000000000007ff
> [40326.289377] x27: ffff80001b60b9a0 x26: 0000000000000000
> [40326.289943] x25: 000000000000000f x24: ffff80001b60b9a0
> [40326.290485] x23: ffff80001b60ba18 x22: ffff0001e0999ea8
> [40326.291027] x21: ffff0000c21db300 x20: ffffffffffffffff
> [40326.291566] x19: fffffe001310ffc0 x18: 0000000000000020
> [40326.292106] x17: 0000000000000000 x16: 0000000000000000
> [40326.292655] x15: ffff0000c21db960 x14: 3030306666666620
> [40326.293197] x13: 6666666666666666 x12: 3130303030303030
> [40326.293746] x11: ffff8000117b69b8 x10: 00000000ffff8000
> [40326.294313] x9 : ffff80001012690c x8 : 0000000000000000
> [40326.294851] x7 : ffff8000114f69b8 x6 : 0000000000017ffd
> [40326.295392] x5 : ffff0007fffbcbc8 x4 : ffff80001b60b5c0
> [40326.295942] x3 : 0000000000000001 x2 : 0000000000000000
> [40326.296497] x1 : 0000000000000000 x0 : 0000000000000000
> [40326.297047] Call trace:
> [40326.297304]  truncate_inode_page+0x64/0x70
> [40326.297724]  truncate_inode_pages_range+0x550/0x7e4
> [40326.298251]  truncate_pagecache+0x58/0x80
> [40326.298662]  do_dentry_open+0x1e4/0x3c0
> [40326.299052]  vfs_open+0x38/0x44
> [40326.299377]  do_open+0x1f0/0x310
> [40326.299709]  path_openat+0x114/0x1dc
> [40326.300077]  do_filp_open+0x84/0x134
> [40326.300444]  do_sys_openat2+0xbc/0x164
> [40326.300825]  __arm64_sys_openat+0x74/0xc0
> [40326.301236]  el0_svc_common.constprop.0+0x88/0x220
> [40326.301723]  do_el0_svc+0x30/0xa0
> [40326.302089]  el0_svc+0x20/0x30
> [40326.302404]  el0_sync_handler+0x1a4/0x1b0
> [40326.302814]  el0_sync+0x180/0x1c0
> [40326.303157] Code: aa0103e0 900061e1 910ec021 9400d300 (d4210000)
> [40326.303775] ---[ end trace f70cdb42cb7c2d42 ]---
> [40326.304244] Kernel panic - not syncing: Oops - BUG: Fatal exception
> 
> This checks the page mapping and retries when subpage of file THP is
> found, in truncate_inode_pages_range.
> 
> Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
> Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
> Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
> ---
>   mm/filemap.c  |  7 ++++++-
>   mm/truncate.c | 17 ++++++++++++++++-
>   2 files changed, 22 insertions(+), 2 deletions(-)
> 
> diff --git a/mm/filemap.c b/mm/filemap.c
> index dae481293..a3af2ec 100644
> --- a/mm/filemap.c
> +++ b/mm/filemap.c
> @@ -2093,7 +2093,6 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
>   		if (!xa_is_value(page)) {
>   			if (page->index < start)
>   				goto put;
> -			VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
>   			if (page->index + thp_nr_pages(page) - 1 > end)
>   				goto put;
>   			if (!trylock_page(page))
> @@ -2102,6 +2101,12 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
>   				goto unlock;
>   			VM_BUG_ON_PAGE(!thp_contains(page, xas.xa_index),
>   					page);
> +			/*
> +			 * We can find and get head page of file THP with
> +			 * non-head index. The head page should have already
> +			 * be truncated with page->mapping reset to NULL.
> +			 */
> +			VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
>   		}
>   		indices[pvec->nr] = xas.xa_index;
>   		if (!pagevec_add(pvec, page))
> diff --git a/mm/truncate.c b/mm/truncate.c
> index 714eaf1..8c59c00 100644
> --- a/mm/truncate.c
> +++ b/mm/truncate.c
> @@ -319,7 +319,8 @@ void truncate_inode_pages_range(struct address_space *mapping,
>   	index = start;
>   	while (index < end && find_lock_entries(mapping, index, end - 1,
>   			&pvec, indices)) {
> -		index = indices[pagevec_count(&pvec) - 1] + 1;
> +		index = indices[pagevec_count(&pvec) - 1] +
> +			thp_nr_pages(pvec.pages[pagevec_count(&pvec) - 1]);
>   		truncate_exceptional_pvec_entries(mapping, &pvec, indices);
>   		for (i = 0; i < pagevec_count(&pvec); i++)
>   			truncate_cleanup_page(pvec.pages[i]);
> @@ -391,6 +392,20 @@ void truncate_inode_pages_range(struct address_space *mapping,
>   			if (xa_is_value(page))
>   				continue;
>   
> +			/*
> +			 * Already truncated? We can find and get subpage
> +			 * of file THP, of which the head page is truncated.
> +			 *
> +			 * In addition, another race will be avoided, where
> +			 * collapse_file rolls back when writer truncates the
> +			 * page cache.
> +			 */
> +			if (page_mapping(page) != mapping) {
> +				/* Restart to make sure all gone */
> +				index = start - 1;
> +				continue;
> +			}
> +
>   			lock_page(page);

Better to check page mapping with page lock, i.e., move above chunk
after lock_page(page), and do not forget to unlock.

                         lock_page(page);
+                       /*
+                        * Already truncated? We can find and get subpage
+                        * of file THP, of which the head page is truncated.
+                        *
+                        * In addition, another race will be avoided, where
+                        * collapse_file rolls back when writer 
truncates the
+                        * page cache.
+                        */
+                       if (page_mapping(page) != mapping) {
+                               unlock_page(page);
+                               /* Restart to make sure all gone */
+                               index = start - 1;
+                               break;
+                       }
+


We will wait for other reviews till we send out v2.



>   			WARN_ON(page_to_index(page) != index);
>   			wait_on_page_writeback(page);
> 

-- 
Thanks,
Yu

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH 2/2] mm, thp: bail out early in collapse_file for writeback page
  2021-09-06 12:12 ` [PATCH 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
@ 2021-09-07 16:56   ` Yang Shi
       [not found]     ` <44BE85B4-692C-41E8-B5A0-C1E0B0272ACD@linux.alibaba.com>
  0 siblings, 1 reply; 61+ messages in thread
From: Yang Shi @ 2021-09-07 16:56 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: Linux MM, Linux Kernel Mailing List, Andrew Morton, cfijalkovich,
	song, william.kucharski, Hugh Dickins, Kirill A. Shutemov

On Mon, Sep 6, 2021 at 5:12 AM Rongwei Wang
<rongwei.wang@linux.alibaba.com> wrote:
>
> Currently collapse_file does not explicitly check PG_writeback, instead,
> page_has_private and try_to_release_page are used to filter writeback
> pages. This does not work for xfs with blocksize equal to or larger

I'm not quite sure if using try_to_release() to check the writeback
flag is on purpose or not, but it should be better to check the flag
more explicitly.

> than pagesize, because in such case xfs has no page->private.
>
> This makes collapse_file bail out early for writeback page. Otherwise,
> xfs end_page_writeback will panic as follows.
>
> [ 6411.448211] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:ffff0003f88c86a8 index:0x0 pfn:0x84ef32
> [ 6411.448304] aops:xfs_address_space_operations [xfs] ino:30000b7 dentry name:"libtest.so"
> [ 6411.448312] flags: 0x57fffe0000008027(locked|referenced|uptodate|active|writeback)
> [ 6411.448317] raw: 57fffe0000008027 ffff80001b48bc28 ffff80001b48bc28 ffff0003f88c86a8
> [ 6411.448321] raw: 0000000000000000 0000000000000000 00000000ffffffff ffff0000c3e9a000
> [ 6411.448324] page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u <= 127u))
> [ 6411.448327] page->mem_cgroup:ffff0000c3e9a000
> [ 6411.448340] ------------[ cut here ]------------
> [ 6411.448343] kernel BUG at include/linux/mm.h:1212!
> [ 6411.449288] Internal error: Oops - BUG: 0 [#1] SMP
> [ 6411.449786] Modules linked in:
> [ 6411.449790] BUG: Bad page state in process khugepaged  pfn:84ef32
> [ 6411.450143]  xfs(E)
> [ 6411.450459] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:0 index:0x0 pfn:0x84ef32
> [ 6411.451361]  libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) cryptd(E) aes_ce_cipher(E) crct10dif_ce(E) ghash_ce(E) sha1_ce(E) uio_pdrv_genirq(E) uio(E) vfat(E) nfsd(E) fat(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) sch_fq_codel(E) ip_tables(E) ext4(E) mbcache(E) jbd2(E) virtio_net(E) net_failover(E) virtio_blk(E) failover(E) sha2_ce(E) sha256_arm64(E) virtio_mmio(E) virtio_pci(E) virtio_ring(E) virtio(E)
> [ 6411.451387] CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Tainted: G        W   E
> [ 6411.451389] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
> [ 6411.451393] pc : end_page_writeback+0x1c0/0x214
> [ 6411.451394] lr : end_page_writeback+0x1c0/0x214
> [ 6411.451395] sp : ffff800011ce3cc0
> [ 6411.451396] x29: ffff800011ce3cc0 x28: 0000000000000000
> [ 6411.451398] x27: ffff000c04608040 x26: 0000000000000000
> [ 6411.451399] x25: ffff000c04608040 x24: 0000000000001000
> [ 6411.451401] x23: ffff0003f88c8530 x22: 0000000000001000
> [ 6411.451403] x21: ffff0003f88c8530 x20: 0000000000000000
> [ 6411.451404] x19: fffffe00201bcc80 x18: 0000000000000030
> [ 6411.451406] x17: 0000000000000000 x16: 0000000000000000
> [ 6411.451407] x15: ffff000c018f9760 x14: ffffffffffffffff
> [ 6411.451409] x13: ffff8000119d72b0 x12: ffff8000119d6ee3
> [ 6411.451410] x11: ffff8000117b69b8 x10: 00000000ffff8000
> [ 6411.451412] x9 : ffff800010617534 x8 : 0000000000000000
> [ 6411.451413] x7 : ffff8000114f69b8 x6 : 000000000000000f
> [ 6411.451415] x5 : 0000000000000000 x4 : 0000000000000000
> [ 6411.451416] x3 : 0000000000000400 x2 : 0000000000000000
> [ 6411.451418] x1 : 0000000000000000 x0 : 0000000000000000
> [ 6411.451420] Call trace:
> [ 6411.451421]  end_page_writeback+0x1c0/0x214
> [ 6411.451424]  iomap_finish_page_writeback+0x13c/0x204
> [ 6411.451425]  iomap_finish_ioend+0xe8/0x19c
> [ 6411.451426]  iomap_writepage_end_bio+0x38/0x50
> [ 6411.451427]  bio_endio+0x168/0x1ec
> [ 6411.451430]  blk_update_request+0x278/0x3f0
> [ 6411.451432]  blk_mq_end_request+0x34/0x15c
> [ 6411.451435]  virtblk_request_done+0x38/0x74 [virtio_blk]
> [ 6411.451437]  blk_done_softirq+0xc4/0x110
> [ 6411.451439]  __do_softirq+0x128/0x38c
> [ 6411.451441]  __irq_exit_rcu+0x118/0x150
> [ 6411.451442]  irq_exit+0x1c/0x30
> [ 6411.451445]  __handle_domain_irq+0x8c/0xf0
> [ 6411.451446]  gic_handle_irq+0x84/0x108
> [ 6411.451447]  el1_irq+0xcc/0x180
> [ 6411.451448]  arch_cpu_idle+0x18/0x40
> [ 6411.451450]  default_idle_call+0x4c/0x1a0
> [ 6411.451453]  cpuidle_idle_call+0x168/0x1e0
> [ 6411.451454]  do_idle+0xb4/0x104
> [ 6411.451455]  cpu_startup_entry+0x30/0x9c
> [ 6411.451458]  secondary_start_kernel+0x104/0x180
> [ 6411.451460] Code: d4210000 b0006161 910c8021 94013f4d (d4210000)
> [ 6411.451462] ---[ end trace 4a88c6a074082f8c ]---
> [ 6411.451464] Kernel panic - not syncing: Oops - BUG: Fatal exception in interrupt
>
> Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
> Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
> Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
> ---
>  mm/khugepaged.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/mm/khugepaged.c b/mm/khugepaged.c
> index 045cc57..529b117 100644
> --- a/mm/khugepaged.c
> +++ b/mm/khugepaged.c
> @@ -1798,7 +1798,8 @@ static void collapse_file(struct mm_struct *mm,
>                         goto out_unlock;
>                 }
>
> -               if (!is_shmem && PageDirty(page)) {
> +               if (!is_shmem && (PageDirty(page) ||
> +                                 PageWriteback(page))) {

Why not check the writeback flag in the place before taking page lock too?

>                         /*
>                          * khugepaged only works on read-only fd, so this
>                          * page is dirty because it hasn't been flushed
> --
> 1.8.3.1
>
>

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-06 12:11 ` [PATCH 1/2] mm, thp: check page mapping when truncating page cache Rongwei Wang
  2021-09-07  2:49   ` Yu Xu
@ 2021-09-07 18:08   ` Yang Shi
       [not found]     ` <38AF4DC8-5E6F-4568-B2E3-0434BD847BC9@linux.alibaba.com>
  2021-09-13 14:49   ` [mm, thp] 20753096b6: BUG:unable_to_handle_page_fault_for_address kernel test robot
  2 siblings, 1 reply; 61+ messages in thread
From: Yang Shi @ 2021-09-07 18:08 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: Linux MM, Linux Kernel Mailing List, Andrew Morton, cfijalkovich,
	song, william.kucharski, Hugh Dickins, Matthew Wilcox

On Mon, Sep 6, 2021 at 5:12 AM Rongwei Wang
<rongwei.wang@linux.alibaba.com> wrote:
>
> Transparent huge page has supported read-only non-shmem files. The file-
> backed THP is collapsed by khugepaged and truncated when written (for
> shared libraries).
>
> However, there is race in two possible places.
>
> 1) multiple writers truncate the same page cache concurrently;
> 2) collapse_file rolls back when writer truncates the page cache;
>
> In both cases, subpage(s) of file THP can be revealed by find_get_entry
> in truncate_inode_pages_range, which will trigger PageTail BUG_ON in
> truncate_inode_page, as follows.
>
> [40326.247034] page:000000009e420ff2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x7ff pfn:0x50c3ff
> [40326.247041] head:0000000075ff816d order:9 compound_mapcount:0 compound_pincount:0
> [40326.247046] flags: 0x37fffe0000010815(locked|uptodate|lru|arch_1|head)
> [40326.247051] raw: 37fffe0000000000 fffffe0013108001 dead000000000122 dead000000000400
> [40326.247053] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
> [40326.247055] head: 37fffe0000010815 fffffe001066bd48 ffff000404183c20 0000000000000000
> [40326.247057] head: 0000000000000600 0000000000000000 00000001ffffffff ffff000c0345a000
> [40326.247058] page dumped because: VM_BUG_ON_PAGE(PageTail(page))
> [40326.247077] ------------[ cut here ]------------
> [40326.247080] kernel BUG at mm/truncate.c:213!
> [40326.280581] Internal error: Oops - BUG: 0 [#1] SMP
> [40326.281077] Modules linked in: xfs(E) libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) cryptd(E) aes_ce_cipher(E) crct10dif_ce(E) ghash_ce(E) sha1_ce(E) uio_pdrv_genirq(E) uio(E) nfsd(E) vfat(E) fat(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) sch_fq_codel(E) ip_tables(E) ext4(E) mbcache(E) jbd2(E) virtio_net(E) net_failover(E) virtio_blk(E) failover(E) sha2_ce(E) sha256_arm64(E) virtio_mmio(E) virtio_pci(E) virtio_ring(E) virtio(E)
> [40326.285130] CPU: 14 PID: 11394 Comm: check_madvise_d Kdump: loaded Tainted: G        W   E     5.10.46-hugetext+ #55
> [40326.286202] Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS 0.0.0 02/06/2015
> [40326.286968] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
> [40326.287584] pc : truncate_inode_page+0x64/0x70
> [40326.288040] lr : truncate_inode_page+0x64/0x70
> [40326.288498] sp : ffff80001b60b900
> [40326.288837] x29: ffff80001b60b900 x28: 00000000000007ff
> [40326.289377] x27: ffff80001b60b9a0 x26: 0000000000000000
> [40326.289943] x25: 000000000000000f x24: ffff80001b60b9a0
> [40326.290485] x23: ffff80001b60ba18 x22: ffff0001e0999ea8
> [40326.291027] x21: ffff0000c21db300 x20: ffffffffffffffff
> [40326.291566] x19: fffffe001310ffc0 x18: 0000000000000020
> [40326.292106] x17: 0000000000000000 x16: 0000000000000000
> [40326.292655] x15: ffff0000c21db960 x14: 3030306666666620
> [40326.293197] x13: 6666666666666666 x12: 3130303030303030
> [40326.293746] x11: ffff8000117b69b8 x10: 00000000ffff8000
> [40326.294313] x9 : ffff80001012690c x8 : 0000000000000000
> [40326.294851] x7 : ffff8000114f69b8 x6 : 0000000000017ffd
> [40326.295392] x5 : ffff0007fffbcbc8 x4 : ffff80001b60b5c0
> [40326.295942] x3 : 0000000000000001 x2 : 0000000000000000
> [40326.296497] x1 : 0000000000000000 x0 : 0000000000000000
> [40326.297047] Call trace:
> [40326.297304]  truncate_inode_page+0x64/0x70
> [40326.297724]  truncate_inode_pages_range+0x550/0x7e4
> [40326.298251]  truncate_pagecache+0x58/0x80
> [40326.298662]  do_dentry_open+0x1e4/0x3c0
> [40326.299052]  vfs_open+0x38/0x44
> [40326.299377]  do_open+0x1f0/0x310
> [40326.299709]  path_openat+0x114/0x1dc
> [40326.300077]  do_filp_open+0x84/0x134
> [40326.300444]  do_sys_openat2+0xbc/0x164
> [40326.300825]  __arm64_sys_openat+0x74/0xc0
> [40326.301236]  el0_svc_common.constprop.0+0x88/0x220
> [40326.301723]  do_el0_svc+0x30/0xa0
> [40326.302089]  el0_svc+0x20/0x30
> [40326.302404]  el0_sync_handler+0x1a4/0x1b0
> [40326.302814]  el0_sync+0x180/0x1c0
> [40326.303157] Code: aa0103e0 900061e1 910ec021 9400d300 (d4210000)
> [40326.303775] ---[ end trace f70cdb42cb7c2d42 ]---
> [40326.304244] Kernel panic - not syncing: Oops - BUG: Fatal exception
>
> This checks the page mapping and retries when subpage of file THP is
> found, in truncate_inode_pages_range.
>
> Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
> Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
> Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
> ---
>  mm/filemap.c  |  7 ++++++-
>  mm/truncate.c | 17 ++++++++++++++++-
>  2 files changed, 22 insertions(+), 2 deletions(-)
>
> diff --git a/mm/filemap.c b/mm/filemap.c
> index dae481293..a3af2ec 100644
> --- a/mm/filemap.c
> +++ b/mm/filemap.c
> @@ -2093,7 +2093,6 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
>                 if (!xa_is_value(page)) {
>                         if (page->index < start)
>                                 goto put;
> -                       VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
>                         if (page->index + thp_nr_pages(page) - 1 > end)
>                                 goto put;
>                         if (!trylock_page(page))
> @@ -2102,6 +2101,12 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
>                                 goto unlock;
>                         VM_BUG_ON_PAGE(!thp_contains(page, xas.xa_index),
>                                         page);
> +                       /*
> +                        * We can find and get head page of file THP with
> +                        * non-head index. The head page should have already
> +                        * be truncated with page->mapping reset to NULL.
> +                        */
> +                       VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
>                 }
>                 indices[pvec->nr] = xas.xa_index;
>                 if (!pagevec_add(pvec, page))
> diff --git a/mm/truncate.c b/mm/truncate.c
> index 714eaf1..8c59c00 100644
> --- a/mm/truncate.c
> +++ b/mm/truncate.c
> @@ -319,7 +319,8 @@ void truncate_inode_pages_range(struct address_space *mapping,
>         index = start;
>         while (index < end && find_lock_entries(mapping, index, end - 1,
>                         &pvec, indices)) {
> -               index = indices[pagevec_count(&pvec) - 1] + 1;
> +               index = indices[pagevec_count(&pvec) - 1] +
> +                       thp_nr_pages(pvec.pages[pagevec_count(&pvec) - 1]);

I don't quite get what this change is doing for. IIUC
find_lock_entries() already handles index advance correctly. If
truncate range is partial THP, it will be handled in the second pass.
AFAICT, the problem is why the THP is not split if it will get
partially truncated. Did I miss something?


>                 truncate_exceptional_pvec_entries(mapping, &pvec, indices);
>                 for (i = 0; i < pagevec_count(&pvec); i++)
>                         truncate_cleanup_page(pvec.pages[i]);
> @@ -391,6 +392,20 @@ void truncate_inode_pages_range(struct address_space *mapping,
>                         if (xa_is_value(page))
>                                 continue;
>
> +                       /*
> +                        * Already truncated? We can find and get subpage
> +                        * of file THP, of which the head page is truncated.
> +                        *
> +                        * In addition, another race will be avoided, where
> +                        * collapse_file rolls back when writer truncates the
> +                        * page cache.
> +                        */
> +                       if (page_mapping(page) != mapping) {
> +                               /* Restart to make sure all gone */
> +                               index = start - 1;
> +                               continue;
> +                       }
> +
>                         lock_page(page);
>                         WARN_ON(page_to_index(page) != index);
>                         wait_on_page_writeback(page);
> --
> 1.8.3.1
>
>

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH 1/2] mm, thp: check page mapping when truncating page cache
       [not found]     ` <38AF4DC8-5E6F-4568-B2E3-0434BD847BC9@linux.alibaba.com>
@ 2021-09-08 21:48       ` Yang Shi
  0 siblings, 0 replies; 61+ messages in thread
From: Yang Shi @ 2021-09-08 21:48 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: Linux MM, Linux Kernel Mailing List, Andrew Morton, cfijalkovich,
	song, william.kucharski, Hugh Dickins, Matthew Wilcox

On Tue, Sep 7, 2021 at 7:41 PM Rongwei Wang
<rongwei.wang@linux.alibaba.com> wrote:
>
>
>
> On Sep 8, 2021, at 2:08 AM, Yang Shi <shy828301@gmail.com> wrote:
>
> On Mon, Sep 6, 2021 at 5:12 AM Rongwei Wang
> <rongwei.wang@linux.alibaba.com> wrote:
>
>
> Transparent huge page has supported read-only non-shmem files. The file-
> backed THP is collapsed by khugepaged and truncated when written (for
> shared libraries).
>
> However, there is race in two possible places.
>
> 1) multiple writers truncate the same page cache concurrently;
> 2) collapse_file rolls back when writer truncates the page cache;
>
> In both cases, subpage(s) of file THP can be revealed by find_get_entry
> in truncate_inode_pages_range, which will trigger PageTail BUG_ON in
> truncate_inode_page, as follows.
>
> [40326.247034] page:000000009e420ff2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x7ff pfn:0x50c3ff
> [40326.247041] head:0000000075ff816d order:9 compound_mapcount:0 compound_pincount:0
> [40326.247046] flags: 0x37fffe0000010815(locked|uptodate|lru|arch_1|head)
> [40326.247051] raw: 37fffe0000000000 fffffe0013108001 dead000000000122 dead000000000400
> [40326.247053] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
> [40326.247055] head: 37fffe0000010815 fffffe001066bd48 ffff000404183c20 0000000000000000
> [40326.247057] head: 0000000000000600 0000000000000000 00000001ffffffff ffff000c0345a000
> [40326.247058] page dumped because: VM_BUG_ON_PAGE(PageTail(page))
> [40326.247077] ------------[ cut here ]------------
> [40326.247080] kernel BUG at mm/truncate.c:213!
> [40326.280581] Internal error: Oops - BUG: 0 [#1] SMP
> [40326.281077] Modules linked in: xfs(E) libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) cryptd(E) aes_ce_cipher(E) crct10dif_ce(E) ghash_ce(E) sha1_ce(E) uio_pdrv_genirq(E) uio(E) nfsd(E) vfat(E) fat(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) sch_fq_codel(E) ip_tables(E) ext4(E) mbcache(E) jbd2(E) virtio_net(E) net_failover(E) virtio_blk(E) failover(E) sha2_ce(E) sha256_arm64(E) virtio_mmio(E) virtio_pci(E) virtio_ring(E) virtio(E)
> [40326.285130] CPU: 14 PID: 11394 Comm: check_madvise_d Kdump: loaded Tainted: G        W   E     5.10.46-hugetext+ #55
> [40326.286202] Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS 0.0.0 02/06/2015
> [40326.286968] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
> [40326.287584] pc : truncate_inode_page+0x64/0x70
> [40326.288040] lr : truncate_inode_page+0x64/0x70
> [40326.288498] sp : ffff80001b60b900
> [40326.288837] x29: ffff80001b60b900 x28: 00000000000007ff
> [40326.289377] x27: ffff80001b60b9a0 x26: 0000000000000000
> [40326.289943] x25: 000000000000000f x24: ffff80001b60b9a0
> [40326.290485] x23: ffff80001b60ba18 x22: ffff0001e0999ea8
> [40326.291027] x21: ffff0000c21db300 x20: ffffffffffffffff
> [40326.291566] x19: fffffe001310ffc0 x18: 0000000000000020
> [40326.292106] x17: 0000000000000000 x16: 0000000000000000
> [40326.292655] x15: ffff0000c21db960 x14: 3030306666666620
> [40326.293197] x13: 6666666666666666 x12: 3130303030303030
> [40326.293746] x11: ffff8000117b69b8 x10: 00000000ffff8000
> [40326.294313] x9 : ffff80001012690c x8 : 0000000000000000
> [40326.294851] x7 : ffff8000114f69b8 x6 : 0000000000017ffd
> [40326.295392] x5 : ffff0007fffbcbc8 x4 : ffff80001b60b5c0
> [40326.295942] x3 : 0000000000000001 x2 : 0000000000000000
> [40326.296497] x1 : 0000000000000000 x0 : 0000000000000000
> [40326.297047] Call trace:
> [40326.297304]  truncate_inode_page+0x64/0x70
> [40326.297724]  truncate_inode_pages_range+0x550/0x7e4
> [40326.298251]  truncate_pagecache+0x58/0x80
> [40326.298662]  do_dentry_open+0x1e4/0x3c0
> [40326.299052]  vfs_open+0x38/0x44
> [40326.299377]  do_open+0x1f0/0x310
> [40326.299709]  path_openat+0x114/0x1dc
> [40326.300077]  do_filp_open+0x84/0x134
> [40326.300444]  do_sys_openat2+0xbc/0x164
> [40326.300825]  __arm64_sys_openat+0x74/0xc0
> [40326.301236]  el0_svc_common.constprop.0+0x88/0x220
> [40326.301723]  do_el0_svc+0x30/0xa0
> [40326.302089]  el0_svc+0x20/0x30
> [40326.302404]  el0_sync_handler+0x1a4/0x1b0
> [40326.302814]  el0_sync+0x180/0x1c0
> [40326.303157] Code: aa0103e0 900061e1 910ec021 9400d300 (d4210000)
> [40326.303775] ---[ end trace f70cdb42cb7c2d42 ]---
> [40326.304244] Kernel panic - not syncing: Oops - BUG: Fatal exception
>
> This checks the page mapping and retries when subpage of file THP is
> found, in truncate_inode_pages_range.
>
> Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
> Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
> Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
> ---
> mm/filemap.c  |  7 ++++++-
> mm/truncate.c | 17 ++++++++++++++++-
> 2 files changed, 22 insertions(+), 2 deletions(-)
>
> diff --git a/mm/filemap.c b/mm/filemap.c
> index dae481293..a3af2ec 100644
> --- a/mm/filemap.c
> +++ b/mm/filemap.c
> @@ -2093,7 +2093,6 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
>                if (!xa_is_value(page)) {
>                        if (page->index < start)
>                                goto put;
> -                       VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
>                        if (page->index + thp_nr_pages(page) - 1 > end)
>                                goto put;
>                        if (!trylock_page(page))
> @@ -2102,6 +2101,12 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
>                                goto unlock;
>                        VM_BUG_ON_PAGE(!thp_contains(page, xas.xa_index),
>                                        page);
> +                       /*
> +                        * We can find and get head page of file THP with
> +                        * non-head index. The head page should have already
> +                        * be truncated with page->mapping reset to NULL.
> +                        */
> +                       VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
>                }
>                indices[pvec->nr] = xas.xa_index;
>                if (!pagevec_add(pvec, page))
> diff --git a/mm/truncate.c b/mm/truncate.c
> index 714eaf1..8c59c00 100644
> --- a/mm/truncate.c
> +++ b/mm/truncate.c
> @@ -319,7 +319,8 @@ void truncate_inode_pages_range(struct address_space *mapping,
>        index = start;
>        while (index < end && find_lock_entries(mapping, index, end - 1,
>                        &pvec, indices)) {
> -               index = indices[pagevec_count(&pvec) - 1] + 1;
> +               index = indices[pagevec_count(&pvec) - 1] +
> +                       thp_nr_pages(pvec.pages[pagevec_count(&pvec) - 1]);
>
>
> I don't quite get what this change is doing for. IIUC
> find_lock_entries() already handles index advance correctly. If
> truncate range is partial THP, it will be handled in the second pass.
>
> Yes, agree.
>
> AFAICT, the problem is why the THP is not split if it will get
>
> Yes, agree.
>
> This change is not necessary, but nice to have. Because find_lock_entries()
> return only head page if any, and it is better to advance the index by thp_nr_pages(), instead of 1.
>
> If you think it introduces unnecessary complexity, I don't mind discarding this change.

IIUC this change may reduce some runtime overhead (-1 call to
find_lock_entries()), but I'd suggest you wait for the comments from
Matthew.

>
> partially truncated. Did I miss something?
>
>
>
>                truncate_exceptional_pvec_entries(mapping, &pvec, indices);
>                for (i = 0; i < pagevec_count(&pvec); i++)
>                        truncate_cleanup_page(pvec.pages[i]);
> @@ -391,6 +392,20 @@ void truncate_inode_pages_range(struct address_space *mapping,
>                        if (xa_is_value(page))
>                                continue;
>
> +                       /*
> +                        * Already truncated? We can find and get subpage
> +                        * of file THP, of which the head page is truncated.
> +                        *
> +                        * In addition, another race will be avoided, where
> +                        * collapse_file rolls back when writer truncates the
> +                        * page cache.
> +                        */
> +                       if (page_mapping(page) != mapping) {
> +                               /* Restart to make sure all gone */
> +                               index = start - 1;
> +                               continue;
> +                       }
> +
>                        lock_page(page);
>                        WARN_ON(page_to_index(page) != index);
>                        wait_on_page_writeback(page);
> —
> 1.8.3.1
>
> Thanks,
> Rongwei Wang
>

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH 2/2] mm, thp: bail out early in collapse_file for writeback page
       [not found]     ` <44BE85B4-692C-41E8-B5A0-C1E0B0272ACD@linux.alibaba.com>
@ 2021-09-08 21:51       ` Yang Shi
  0 siblings, 0 replies; 61+ messages in thread
From: Yang Shi @ 2021-09-08 21:51 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: Linux MM, Linux Kernel Mailing List, Andrew Morton, cfijalkovich,
	song, william.kucharski, Hugh Dickins, Kirill A. Shutemov

On Tue, Sep 7, 2021 at 7:16 PM Rongwei Wang
<rongwei.wang@linux.alibaba.com> wrote:
>
>
>
> On Sep 8, 2021, at 12:56 AM, Yang Shi <shy828301@gmail.com> wrote:
>
> On Mon, Sep 6, 2021 at 5:12 AM Rongwei Wang
> <rongwei.wang@linux.alibaba.com> wrote:
>
>
> Currently collapse_file does not explicitly check PG_writeback, instead,
> page_has_private and try_to_release_page are used to filter writeback
> pages. This does not work for xfs with blocksize equal to or larger
>
>
> I'm not quite sure if using try_to_release() to check the writeback
> flag is on purpose or not, but it should be better to check the flag
> more explicitly.
>
> Uh-huh. It is sure that try_to_release_page will check the writeback flag
> of page. But the place where check the writeback flag using:
>
> If (page_has_private(page) &&
> !try_to_release_page(page, GFP_KERNEL)) {
> ...
> }
>
> The original code will miss the page which in writeback status but has no private data.
> The XFS case that above mentioned belongs to.
>
> Thanks!
>
>
> than pagesize, because in such case xfs has no page->private.
>
> This makes collapse_file bail out early for writeback page. Otherwise,
> xfs end_page_writeback will panic as follows.
>
> [ 6411.448211] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:ffff0003f88c86a8 index:0x0 pfn:0x84ef32
> [ 6411.448304] aops:xfs_address_space_operations [xfs] ino:30000b7 dentry name:"libtest.so"
> [ 6411.448312] flags: 0x57fffe0000008027(locked|referenced|uptodate|active|writeback)
> [ 6411.448317] raw: 57fffe0000008027 ffff80001b48bc28 ffff80001b48bc28 ffff0003f88c86a8
> [ 6411.448321] raw: 0000000000000000 0000000000000000 00000000ffffffff ffff0000c3e9a000
> [ 6411.448324] page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u <= 127u))
> [ 6411.448327] page->mem_cgroup:ffff0000c3e9a000
> [ 6411.448340] ------------[ cut here ]------------
> [ 6411.448343] kernel BUG at include/linux/mm.h:1212!
> [ 6411.449288] Internal error: Oops - BUG: 0 [#1] SMP
> [ 6411.449786] Modules linked in:
> [ 6411.449790] BUG: Bad page state in process khugepaged  pfn:84ef32
> [ 6411.450143]  xfs(E)
> [ 6411.450459] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:0 index:0x0 pfn:0x84ef32
> [ 6411.451361]  libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) cryptd(E) aes_ce_cipher(E) crct10dif_ce(E) ghash_ce(E) sha1_ce(E) uio_pdrv_genirq(E) uio(E) vfat(E) nfsd(E) fat(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) sch_fq_codel(E) ip_tables(E) ext4(E) mbcache(E) jbd2(E) virtio_net(E) net_failover(E) virtio_blk(E) failover(E) sha2_ce(E) sha256_arm64(E) virtio_mmio(E) virtio_pci(E) virtio_ring(E) virtio(E)
> [ 6411.451387] CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Tainted: G        W   E
> [ 6411.451389] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
> [ 6411.451393] pc : end_page_writeback+0x1c0/0x214
> [ 6411.451394] lr : end_page_writeback+0x1c0/0x214
> [ 6411.451395] sp : ffff800011ce3cc0
> [ 6411.451396] x29: ffff800011ce3cc0 x28: 0000000000000000
> [ 6411.451398] x27: ffff000c04608040 x26: 0000000000000000
> [ 6411.451399] x25: ffff000c04608040 x24: 0000000000001000
> [ 6411.451401] x23: ffff0003f88c8530 x22: 0000000000001000
> [ 6411.451403] x21: ffff0003f88c8530 x20: 0000000000000000
> [ 6411.451404] x19: fffffe00201bcc80 x18: 0000000000000030
> [ 6411.451406] x17: 0000000000000000 x16: 0000000000000000
> [ 6411.451407] x15: ffff000c018f9760 x14: ffffffffffffffff
> [ 6411.451409] x13: ffff8000119d72b0 x12: ffff8000119d6ee3
> [ 6411.451410] x11: ffff8000117b69b8 x10: 00000000ffff8000
> [ 6411.451412] x9 : ffff800010617534 x8 : 0000000000000000
> [ 6411.451413] x7 : ffff8000114f69b8 x6 : 000000000000000f
> [ 6411.451415] x5 : 0000000000000000 x4 : 0000000000000000
> [ 6411.451416] x3 : 0000000000000400 x2 : 0000000000000000
> [ 6411.451418] x1 : 0000000000000000 x0 : 0000000000000000
> [ 6411.451420] Call trace:
> [ 6411.451421]  end_page_writeback+0x1c0/0x214
> [ 6411.451424]  iomap_finish_page_writeback+0x13c/0x204
> [ 6411.451425]  iomap_finish_ioend+0xe8/0x19c
> [ 6411.451426]  iomap_writepage_end_bio+0x38/0x50
> [ 6411.451427]  bio_endio+0x168/0x1ec
> [ 6411.451430]  blk_update_request+0x278/0x3f0
> [ 6411.451432]  blk_mq_end_request+0x34/0x15c
> [ 6411.451435]  virtblk_request_done+0x38/0x74 [virtio_blk]
> [ 6411.451437]  blk_done_softirq+0xc4/0x110
> [ 6411.451439]  __do_softirq+0x128/0x38c
> [ 6411.451441]  __irq_exit_rcu+0x118/0x150
> [ 6411.451442]  irq_exit+0x1c/0x30
> [ 6411.451445]  __handle_domain_irq+0x8c/0xf0
> [ 6411.451446]  gic_handle_irq+0x84/0x108
> [ 6411.451447]  el1_irq+0xcc/0x180
> [ 6411.451448]  arch_cpu_idle+0x18/0x40
> [ 6411.451450]  default_idle_call+0x4c/0x1a0
> [ 6411.451453]  cpuidle_idle_call+0x168/0x1e0
> [ 6411.451454]  do_idle+0xb4/0x104
> [ 6411.451455]  cpu_startup_entry+0x30/0x9c
> [ 6411.451458]  secondary_start_kernel+0x104/0x180
> [ 6411.451460] Code: d4210000 b0006161 910c8021 94013f4d (d4210000)
> [ 6411.451462] ---[ end trace 4a88c6a074082f8c ]---
> [ 6411.451464] Kernel panic - not syncing: Oops - BUG: Fatal exception in interrupt
>
> Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
> Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
> Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
> ---
> mm/khugepaged.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/mm/khugepaged.c b/mm/khugepaged.c
> index 045cc57..529b117 100644
> --- a/mm/khugepaged.c
> +++ b/mm/khugepaged.c
> @@ -1798,7 +1798,8 @@ static void collapse_file(struct mm_struct *mm,
>                        goto out_unlock;
>                }
>
> -               if (!is_shmem && PageDirty(page)) {
> +               if (!is_shmem && (PageDirty(page) ||
> +                                 PageWriteback(page))) {
>
>
> Why not check the writeback flag in the place before taking page lock too?
>
> Thanks! Your words remind me. I will double check the writeback flag before
> and after taking page lock. Likes:
>
> +                       } else if (PageWriteback(page)) {
> +                               xas_unlock_irq(&xas);
> +                               result = SCAN_FAIL;
> +                               goto xa_unlocked;
>                         } else if (trylock_page(page)) {
>                                 get_page(page);
>                                 xas_unlock_irq(&xas);
> @@ -1798,7 +1802,8 @@ static void collapse_file(struct mm_struct *mm,
>                         goto out_unlock;
>                 }
>
> -               if (!is_shmem && PageDirty(page)) {
> +               if (!is_shmem && (PageDirty(page) ||
> +                                 PageWriteback(page))) {

Yeah, this is what I meant. Thanks.

>
> Thanks!
>
>
>                        /*
>                         * khugepaged only works on read-only fd, so this
>                         * page is dirty because it hasn't been flushed
> --
> 1.8.3.1
>
>

^ permalink raw reply	[flat|nested] 61+ messages in thread

* [mm, thp]  20753096b6: BUG:unable_to_handle_page_fault_for_address
  2021-09-06 12:11 ` [PATCH 1/2] mm, thp: check page mapping when truncating page cache Rongwei Wang
  2021-09-07  2:49   ` Yu Xu
  2021-09-07 18:08   ` Yang Shi
@ 2021-09-13 14:49   ` kernel test robot
  2 siblings, 0 replies; 61+ messages in thread
From: kernel test robot @ 2021-09-13 14:49 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: 0day robot, Xu Yu, LKML, lkp, linux-mm, akpm, cfijalkovich, song,
	william.kucharski, hughd

[-- Attachment #1: Type: text/plain, Size: 6568 bytes --]



Greeting,

FYI, we noticed the following commit (built with gcc-9):

commit: 20753096b67c9e841862c4f6f984aaac7dbe7183 ("[PATCH 1/2] mm, thp: check page mapping when truncating page cache")
url: https://github.com/0day-ci/linux/commits/Rongwei-Wang/mm-thp-fix-file-backed-THP-race-in-collapse_file/20210906-201318
base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git 27151f177827d478508e756c7657273261aaf8a9

in testcase: nvml
version: nvml-x86_64-ff6f0f125-1_20210908
with following parameters:

	test: pmem
	group: pmem
	nr_pmem: 1
	fs: ext4
	mount_option: dax
	bp_memmap: 32G!4G
	ucode: 0x7000019



on test machine: 16 threads 1 sockets Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 48G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):



If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@intel.com>


[  491.999010][T20052] BUG: unable to handle page fault for address: 00000000131ac00d
[  492.019156][T20052] #PF: supervisor read access in kernel mode
[  492.024977][T20052] #PF: error_code(0x0000) - not-present page
[  492.030802][T20052] PGD 0 P4D 0
[  492.034026][T20052] Oops: 0000 [#1] SMP PTI
[  492.038204][T20052] CPU: 11 PID: 20052 Comm: rm Not tainted 5.14.0-09688-g20753096b67c #1
[  492.046370][T20052] Hardware name: Supermicro SYS-5018D-FN4T/X10SDV-8C-TLN4F, BIOS 1.1 03/02/2016
[  492.055225][T20052] RIP: 0010:truncate_inode_pages_range+0xd3/0x7c0
[  492.061490][T20052] Code: 89 fa 48 89 ee 4c 89 e7 e8 0a 05 ff ff 85 c0 0f 84 de 00 00 00 0f b6 84 24 90 00 00 00 8d 48 ff 89 c2 48 8b 84 cc 98 00 00 00 <48> 8b 00 48 c1 e8 10 83 e0 01 3c 01 48 19 ed 48 81 e5 01 fe ff ff
[  492.080932][T20052] RSP: 0018:ffffc900014e7d10 EFLAGS: 00010202
[  492.086850][T20052] RAX: 00000000131ac00d RBX: ffffc900014e7da0 RCX: 0000000000000000
[  492.094668][T20052] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffc900014e7ca0
[  492.102485][T20052] RBP: 0000000000000000 R08: 0000000000000000 R09: fffffffffffffffe
[  492.110301][T20052] R10: 0000000000001000 R11: ffff888977af07f0 R12: ffff88891aa77010
[  492.118119][T20052] R13: ffffc900014e7d28 R14: ffff88891aa76e98 R15: fffffffffffffffe
[  492.125937][T20052] FS:  00007f546799d580(0000) GS:ffff888c4aac0000(0000) knlGS:0000000000000000
[  492.134715][T20052] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  492.141147][T20052] CR2: 00000000131ac00d CR3: 000000098d508002 CR4: 00000000003706e0
[  492.148962][T20052] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  492.156781][T20052] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  492.164597][T20052] Call Trace:
[  492.167737][T20052]  ? __wake_up_common_lock+0x8a/0xc0
[  492.172880][T20052]  ? jbd2_journal_stop+0x14e/0x300
[  492.177840][T20052]  ext4_evict_inode+0x113/0x6c0
[  492.182537][T20052]  evict+0xd8/0x180
[  492.186194][T20052]  do_unlinkat+0x1d8/0x300
[  492.190459][T20052]  __x64_sys_unlinkat+0x34/0x80
[  492.195155][T20052]  do_syscall_64+0x3b/0xc0
[  492.199421][T20052]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[  492.205166][T20052] RIP: 0033:0x7f54678beff7
[  492.209430][T20052] Code: 73 01 c3 48 8b 0d 99 ee 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 07 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 69 ee 0c 00 f7 d8 64 89 01 48
[  492.228885][T20052] RSP: 002b:00007ffc1b088f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000107
[  492.237145][T20052] RAX: ffffffffffffffda RBX: 00005638f43dd6d0 RCX: 00007f54678beff7
[  492.244964][T20052] RDX: 0000000000000000 RSI: 00005638f43dd7d8 RDI: 0000000000000005
[  492.252779][T20052] RBP: 00005638f43dc2b0 R08: 0000000000000003 R09: 0000000000000000
[  492.260597][T20052] R10: fffffffffffffbd8 R11: 0000000000000206 R12: 00007ffc1b089100
[  492.268413][T20052] R13: 0000000000000000 R14: 00005638f43dd6d0 R15: 0000000000000000
[  492.276233][T20052] Modules linked in: dm_mod xfs intel_rapl_msr intel_rapl_common btrfs blake2b_generic xor zstd_compress raid6_pq libcrc32c sb_edac x86_pkg_temp_thermal intel_powerclamp sd_mod t10_pi sg coretemp ast drm_vram_helper kvm_intel drm_ttm_helper ttm kvm drm_kms_helper irqbypass ipmi_ssif crct10dif_pclmul dax_pmem_compat crc32_pclmul crc32c_intel syscopyarea ghash_clmulni_intel sysfillrect device_dax sysimgblt rapl nd_pmem ahci dax_pmem_core nd_btt fb_sys_fops libahci intel_cstate acpi_ipmi mxm_wmi nd_e820 drm mei_me libata ipmi_si gpio_ich intel_pch_thermal intel_uncore libnvdimm ioatdma mei joydev ipmi_devintf dca ipmi_msghandler wmi acpi_pad ip_tables
[  492.335150][T20052] CR2: 00000000131ac00d
[  492.339162][T20052] ---[ end trace 0052004592872eb3 ]---
[  492.360394][T20052] RIP: 0010:truncate_inode_pages_range+0xd3/0x7c0
[  492.366659][T20052] Code: 89 fa 48 89 ee 4c 89 e7 e8 0a 05 ff ff 85 c0 0f 84 de 00 00 00 0f b6 84 24 90 00 00 00 8d 48 ff 89 c2 48 8b 84 cc 98 00 00 00 <48> 8b 00 48 c1 e8 10 83 e0 01 3c 01 48 19 ed 48 81 e5 01 fe ff ff
[  492.386097][T20052] RSP: 0018:ffffc900014e7d10 EFLAGS: 00010202
[  492.392008][T20052] RAX: 00000000131ac00d RBX: ffffc900014e7da0 RCX: 0000000000000000
[  492.399827][T20052] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffc900014e7ca0
[  492.407651][T20052] RBP: 0000000000000000 R08: 0000000000000000 R09: fffffffffffffffe
[  492.415468][T20052] R10: 0000000000001000 R11: ffff888977af07f0 R12: ffff88891aa77010
[  492.423286][T20052] R13: ffffc900014e7d28 R14: ffff88891aa76e98 R15: fffffffffffffffe
[  492.431102][T20052] FS:  00007f546799d580(0000) GS:ffff888c4aac0000(0000) knlGS:0000000000000000
[  492.439879][T20052] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  492.446313][T20052] CR2: 00000000131ac00d CR3: 000000098d508002 CR4: 00000000003706e0
[  492.454129][T20052] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  492.461947][T20052] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  492.469766][T20052] Kernel panic - not syncing: Fatal exception
[  492.601630][T20052] Kernel Offset: disabled



To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install                job.yaml  # job file is attached in this email
        bin/lkp split-job --compatible job.yaml  # generate the yaml file for lkp run
        bin/lkp run                    generated-yaml-file



---
0DAY/LKP+ Test Infrastructure                   Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@lists.01.org       Intel Corporation

Thanks,
Oliver Sang


[-- Attachment #2: config-5.14.0-09688-g20753096b67c --]
[-- Type: text/plain, Size: 174915 bytes --]

#
# Automatically generated file; DO NOT EDIT.
# Linux/x86_64 5.14.0 Kernel Configuration
#
CONFIG_CC_VERSION_TEXT="gcc-9 (Debian 9.3.0-22) 9.3.0"
CONFIG_CC_IS_GCC=y
CONFIG_GCC_VERSION=90300
CONFIG_CLANG_VERSION=0
CONFIG_AS_IS_GNU=y
CONFIG_AS_VERSION=23502
CONFIG_LD_IS_BFD=y
CONFIG_LD_VERSION=23502
CONFIG_LLD_VERSION=0
CONFIG_CC_CAN_LINK=y
CONFIG_CC_CAN_LINK_STATIC=y
CONFIG_CC_HAS_ASM_GOTO=y
CONFIG_CC_HAS_ASM_INLINE=y
CONFIG_CC_HAS_NO_PROFILE_FN_ATTR=y
CONFIG_IRQ_WORK=y
CONFIG_BUILDTIME_TABLE_SORT=y
CONFIG_THREAD_INFO_IN_TASK=y

#
# General setup
#
CONFIG_INIT_ENV_ARG_LIMIT=32
# CONFIG_COMPILE_TEST is not set
# CONFIG_WERROR is not set
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_BUILD_SALT=""
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_BZIP2=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_HAVE_KERNEL_LZO=y
CONFIG_HAVE_KERNEL_LZ4=y
CONFIG_HAVE_KERNEL_ZSTD=y
CONFIG_KERNEL_GZIP=y
# CONFIG_KERNEL_BZIP2 is not set
# CONFIG_KERNEL_LZMA is not set
# CONFIG_KERNEL_XZ is not set
# CONFIG_KERNEL_LZO is not set
# CONFIG_KERNEL_LZ4 is not set
# CONFIG_KERNEL_ZSTD is not set
CONFIG_DEFAULT_INIT=""
CONFIG_DEFAULT_HOSTNAME="(none)"
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
# CONFIG_WATCH_QUEUE is not set
CONFIG_CROSS_MEMORY_ATTACH=y
# CONFIG_USELIB is not set
CONFIG_AUDIT=y
CONFIG_HAVE_ARCH_AUDITSYSCALL=y
CONFIG_AUDITSYSCALL=y

#
# IRQ subsystem
#
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_GENERIC_IRQ_MIGRATION=y
CONFIG_GENERIC_IRQ_INJECTION=y
CONFIG_HARDIRQS_SW_RESEND=y
CONFIG_IRQ_DOMAIN=y
CONFIG_IRQ_DOMAIN_HIERARCHY=y
CONFIG_GENERIC_MSI_IRQ=y
CONFIG_GENERIC_MSI_IRQ_DOMAIN=y
CONFIG_IRQ_MSI_IOMMU=y
CONFIG_GENERIC_IRQ_MATRIX_ALLOCATOR=y
CONFIG_GENERIC_IRQ_RESERVATION_MODE=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y
# CONFIG_GENERIC_IRQ_DEBUGFS is not set
# end of IRQ subsystem

CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_ARCH_CLOCKSOURCE_INIT=y
CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE=y
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_GENERIC_CLOCKEVENTS_MIN_ADJUST=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_HAVE_POSIX_CPU_TIMERS_TASK_WORK=y
CONFIG_POSIX_CPU_TIMERS_TASK_WORK=y
CONFIG_TIME_KUNIT_TEST=m

#
# Timers subsystem
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ_COMMON=y
# CONFIG_HZ_PERIODIC is not set
# CONFIG_NO_HZ_IDLE is not set
CONFIG_NO_HZ_FULL=y
CONFIG_CONTEXT_TRACKING=y
# CONFIG_CONTEXT_TRACKING_FORCE is not set
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
# end of Timers subsystem

CONFIG_BPF=y
CONFIG_HAVE_EBPF_JIT=y
CONFIG_ARCH_WANT_DEFAULT_BPF_JIT=y

#
# BPF subsystem
#
CONFIG_BPF_SYSCALL=y
CONFIG_BPF_JIT=y
CONFIG_BPF_JIT_ALWAYS_ON=y
CONFIG_BPF_JIT_DEFAULT_ON=y
# CONFIG_BPF_UNPRIV_DEFAULT_OFF is not set
# CONFIG_BPF_PRELOAD is not set
# CONFIG_BPF_LSM is not set
# end of BPF subsystem

# CONFIG_PREEMPT_NONE is not set
CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set
CONFIG_PREEMPT_COUNT=y
# CONFIG_SCHED_CORE is not set

#
# CPU/Task time and stats accounting
#
CONFIG_VIRT_CPU_ACCOUNTING=y
CONFIG_VIRT_CPU_ACCOUNTING_GEN=y
CONFIG_IRQ_TIME_ACCOUNTING=y
CONFIG_HAVE_SCHED_AVG_IRQ=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
CONFIG_TASKSTATS=y
CONFIG_TASK_DELAY_ACCT=y
CONFIG_TASK_XACCT=y
CONFIG_TASK_IO_ACCOUNTING=y
# CONFIG_PSI is not set
# end of CPU/Task time and stats accounting

CONFIG_CPU_ISOLATION=y

#
# RCU Subsystem
#
CONFIG_TREE_RCU=y
# CONFIG_RCU_EXPERT is not set
CONFIG_SRCU=y
CONFIG_TREE_SRCU=y
CONFIG_TASKS_RCU_GENERIC=y
CONFIG_TASKS_RUDE_RCU=y
CONFIG_TASKS_TRACE_RCU=y
CONFIG_RCU_STALL_COMMON=y
CONFIG_RCU_NEED_SEGCBLIST=y
CONFIG_RCU_NOCB_CPU=y
# end of RCU Subsystem

CONFIG_BUILD_BIN2C=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
# CONFIG_IKHEADERS is not set
CONFIG_LOG_BUF_SHIFT=20
CONFIG_LOG_CPU_MAX_BUF_SHIFT=12
CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=13
# CONFIG_PRINTK_INDEX is not set
CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y

#
# Scheduler features
#
# CONFIG_UCLAMP_TASK is not set
# end of Scheduler features

CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y
CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH=y
CONFIG_CC_HAS_INT128=y
CONFIG_ARCH_SUPPORTS_INT128=y
CONFIG_NUMA_BALANCING=y
CONFIG_NUMA_BALANCING_DEFAULT_ENABLED=y
CONFIG_CGROUPS=y
CONFIG_PAGE_COUNTER=y
CONFIG_MEMCG=y
CONFIG_MEMCG_SWAP=y
CONFIG_MEMCG_KMEM=y
CONFIG_BLK_CGROUP=y
CONFIG_CGROUP_WRITEBACK=y
CONFIG_CGROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
CONFIG_CFS_BANDWIDTH=y
CONFIG_RT_GROUP_SCHED=y
CONFIG_CGROUP_PIDS=y
CONFIG_CGROUP_RDMA=y
CONFIG_CGROUP_FREEZER=y
CONFIG_CGROUP_HUGETLB=y
CONFIG_CPUSETS=y
CONFIG_PROC_PID_CPUSET=y
CONFIG_CGROUP_DEVICE=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_CGROUP_PERF=y
CONFIG_CGROUP_BPF=y
# CONFIG_CGROUP_MISC is not set
# CONFIG_CGROUP_DEBUG is not set
CONFIG_SOCK_CGROUP_DATA=y
CONFIG_NAMESPACES=y
CONFIG_UTS_NS=y
CONFIG_TIME_NS=y
CONFIG_IPC_NS=y
CONFIG_USER_NS=y
CONFIG_PID_NS=y
CONFIG_NET_NS=y
CONFIG_CHECKPOINT_RESTORE=y
CONFIG_SCHED_AUTOGROUP=y
# CONFIG_SYSFS_DEPRECATED is not set
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_RD_GZIP=y
CONFIG_RD_BZIP2=y
CONFIG_RD_LZMA=y
CONFIG_RD_XZ=y
CONFIG_RD_LZO=y
CONFIG_RD_LZ4=y
CONFIG_RD_ZSTD=y
# CONFIG_BOOT_CONFIG is not set
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_LD_ORPHAN_WARN=y
CONFIG_SYSCTL=y
CONFIG_HAVE_UID16=y
CONFIG_SYSCTL_EXCEPTION_TRACE=y
CONFIG_HAVE_PCSPKR_PLATFORM=y
# CONFIG_EXPERT is not set
CONFIG_UID16=y
CONFIG_MULTIUSER=y
CONFIG_SGETMASK_SYSCALL=y
CONFIG_SYSFS_SYSCALL=y
CONFIG_FHANDLE=y
CONFIG_POSIX_TIMERS=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_PCSPKR_PLATFORM=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_FUTEX_PI=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
CONFIG_IO_URING=y
CONFIG_ADVISE_SYSCALLS=y
CONFIG_HAVE_ARCH_USERFAULTFD_WP=y
CONFIG_HAVE_ARCH_USERFAULTFD_MINOR=y
CONFIG_MEMBARRIER=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
CONFIG_KALLSYMS_ABSOLUTE_PERCPU=y
CONFIG_KALLSYMS_BASE_RELATIVE=y
CONFIG_USERFAULTFD=y
CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y
CONFIG_KCMP=y
CONFIG_RSEQ=y
# CONFIG_EMBEDDED is not set
CONFIG_HAVE_PERF_EVENTS=y

#
# Kernel Performance Events And Counters
#
CONFIG_PERF_EVENTS=y
# CONFIG_DEBUG_PERF_USE_VMALLOC is not set
# end of Kernel Performance Events And Counters

CONFIG_VM_EVENT_COUNTERS=y
CONFIG_SLUB_DEBUG=y
# CONFIG_COMPAT_BRK is not set
# CONFIG_SLAB is not set
CONFIG_SLUB=y
CONFIG_SLAB_MERGE_DEFAULT=y
CONFIG_SLAB_FREELIST_RANDOM=y
# CONFIG_SLAB_FREELIST_HARDENED is not set
CONFIG_SHUFFLE_PAGE_ALLOCATOR=y
CONFIG_SLUB_CPU_PARTIAL=y
CONFIG_SYSTEM_DATA_VERIFICATION=y
CONFIG_PROFILING=y
CONFIG_TRACEPOINTS=y
# end of General setup

CONFIG_64BIT=y
CONFIG_X86_64=y
CONFIG_X86=y
CONFIG_INSTRUCTION_DECODER=y
CONFIG_OUTPUT_FORMAT="elf64-x86-64"
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_MMU=y
CONFIG_ARCH_MMAP_RND_BITS_MIN=28
CONFIG_ARCH_MMAP_RND_BITS_MAX=32
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MIN=8
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MAX=16
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_ARCH_HAS_CPU_RELAX=y
CONFIG_ARCH_HAS_FILTER_PGPROT=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_ARCH_WANT_GENERAL_HUGETLB=y
CONFIG_AUDIT_ARCH=y
CONFIG_HAVE_INTEL_TXT=y
CONFIG_X86_64_SMP=y
CONFIG_ARCH_SUPPORTS_UPROBES=y
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_PGTABLE_LEVELS=5
CONFIG_CC_HAS_SANE_STACKPROTECTOR=y

#
# Processor type and features
#
CONFIG_SMP=y
CONFIG_X86_FEATURE_NAMES=y
CONFIG_X86_X2APIC=y
CONFIG_X86_MPPARSE=y
# CONFIG_GOLDFISH is not set
CONFIG_RETPOLINE=y
# CONFIG_X86_CPU_RESCTRL is not set
CONFIG_X86_EXTENDED_PLATFORM=y
# CONFIG_X86_NUMACHIP is not set
# CONFIG_X86_VSMP is not set
CONFIG_X86_UV=y
# CONFIG_X86_GOLDFISH is not set
# CONFIG_X86_INTEL_MID is not set
CONFIG_X86_INTEL_LPSS=y
# CONFIG_X86_AMD_PLATFORM_DEVICE is not set
CONFIG_IOSF_MBI=y
# CONFIG_IOSF_MBI_DEBUG is not set
CONFIG_X86_SUPPORTS_MEMORY_FAILURE=y
# CONFIG_SCHED_OMIT_FRAME_POINTER is not set
CONFIG_HYPERVISOR_GUEST=y
CONFIG_PARAVIRT=y
# CONFIG_PARAVIRT_DEBUG is not set
CONFIG_PARAVIRT_SPINLOCKS=y
CONFIG_X86_HV_CALLBACK_VECTOR=y
# CONFIG_XEN is not set
CONFIG_KVM_GUEST=y
CONFIG_ARCH_CPUIDLE_HALTPOLL=y
# CONFIG_PVH is not set
CONFIG_PARAVIRT_TIME_ACCOUNTING=y
CONFIG_PARAVIRT_CLOCK=y
# CONFIG_JAILHOUSE_GUEST is not set
# CONFIG_ACRN_GUEST is not set
# CONFIG_MK8 is not set
# CONFIG_MPSC is not set
# CONFIG_MCORE2 is not set
# CONFIG_MATOM is not set
CONFIG_GENERIC_CPU=y
CONFIG_X86_INTERNODE_CACHE_SHIFT=6
CONFIG_X86_L1_CACHE_SHIFT=6
CONFIG_X86_TSC=y
CONFIG_X86_CMPXCHG64=y
CONFIG_X86_CMOV=y
CONFIG_X86_MINIMUM_CPU_FAMILY=64
CONFIG_X86_DEBUGCTLMSR=y
CONFIG_IA32_FEAT_CTL=y
CONFIG_X86_VMX_FEATURE_NAMES=y
CONFIG_CPU_SUP_INTEL=y
CONFIG_CPU_SUP_AMD=y
CONFIG_CPU_SUP_HYGON=y
CONFIG_CPU_SUP_CENTAUR=y
CONFIG_CPU_SUP_ZHAOXIN=y
CONFIG_HPET_TIMER=y
CONFIG_HPET_EMULATE_RTC=y
CONFIG_DMI=y
# CONFIG_GART_IOMMU is not set
CONFIG_MAXSMP=y
CONFIG_NR_CPUS_RANGE_BEGIN=8192
CONFIG_NR_CPUS_RANGE_END=8192
CONFIG_NR_CPUS_DEFAULT=8192
CONFIG_NR_CPUS=8192
CONFIG_SCHED_SMT=y
CONFIG_SCHED_MC=y
CONFIG_SCHED_MC_PRIO=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS=y
CONFIG_X86_MCE=y
CONFIG_X86_MCELOG_LEGACY=y
CONFIG_X86_MCE_INTEL=y
CONFIG_X86_MCE_AMD=y
CONFIG_X86_MCE_THRESHOLD=y
CONFIG_X86_MCE_INJECT=m

#
# Performance monitoring
#
CONFIG_PERF_EVENTS_INTEL_UNCORE=m
CONFIG_PERF_EVENTS_INTEL_RAPL=m
CONFIG_PERF_EVENTS_INTEL_CSTATE=m
# CONFIG_PERF_EVENTS_AMD_POWER is not set
CONFIG_PERF_EVENTS_AMD_UNCORE=y
# end of Performance monitoring

CONFIG_X86_16BIT=y
CONFIG_X86_ESPFIX64=y
CONFIG_X86_VSYSCALL_EMULATION=y
CONFIG_X86_IOPL_IOPERM=y
CONFIG_I8K=m
CONFIG_MICROCODE=y
CONFIG_MICROCODE_INTEL=y
CONFIG_MICROCODE_AMD=y
CONFIG_MICROCODE_OLD_INTERFACE=y
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
CONFIG_X86_5LEVEL=y
CONFIG_X86_DIRECT_GBPAGES=y
# CONFIG_X86_CPA_STATISTICS is not set
# CONFIG_AMD_MEM_ENCRYPT is not set
CONFIG_NUMA=y
# CONFIG_AMD_NUMA is not set
CONFIG_X86_64_ACPI_NUMA=y
CONFIG_NUMA_EMU=y
CONFIG_NODES_SHIFT=10
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_DEFAULT=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
# CONFIG_ARCH_MEMORY_PROBE is not set
CONFIG_ARCH_PROC_KCORE_TEXT=y
CONFIG_ILLEGAL_POINTER_VALUE=0xdead000000000000
CONFIG_X86_PMEM_LEGACY_DEVICE=y
CONFIG_X86_PMEM_LEGACY=m
CONFIG_X86_CHECK_BIOS_CORRUPTION=y
# CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK is not set
CONFIG_MTRR=y
CONFIG_MTRR_SANITIZER=y
CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1
CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
CONFIG_X86_PAT=y
CONFIG_ARCH_USES_PG_UNCACHED=y
CONFIG_ARCH_RANDOM=y
CONFIG_X86_SMAP=y
CONFIG_X86_UMIP=y
CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS=y
CONFIG_X86_INTEL_TSX_MODE_OFF=y
# CONFIG_X86_INTEL_TSX_MODE_ON is not set
# CONFIG_X86_INTEL_TSX_MODE_AUTO is not set
# CONFIG_X86_SGX is not set
CONFIG_EFI=y
CONFIG_EFI_STUB=y
CONFIG_EFI_MIXED=y
# CONFIG_HZ_100 is not set
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
CONFIG_HZ_1000=y
CONFIG_HZ=1000
CONFIG_SCHED_HRTICK=y
CONFIG_KEXEC=y
CONFIG_KEXEC_FILE=y
CONFIG_ARCH_HAS_KEXEC_PURGATORY=y
# CONFIG_KEXEC_SIG is not set
CONFIG_CRASH_DUMP=y
CONFIG_KEXEC_JUMP=y
CONFIG_PHYSICAL_START=0x1000000
CONFIG_RELOCATABLE=y
CONFIG_RANDOMIZE_BASE=y
CONFIG_X86_NEED_RELOCS=y
CONFIG_PHYSICAL_ALIGN=0x200000
CONFIG_DYNAMIC_MEMORY_LAYOUT=y
CONFIG_RANDOMIZE_MEMORY=y
CONFIG_RANDOMIZE_MEMORY_PHYSICAL_PADDING=0xa
CONFIG_HOTPLUG_CPU=y
CONFIG_BOOTPARAM_HOTPLUG_CPU0=y
# CONFIG_DEBUG_HOTPLUG_CPU0 is not set
# CONFIG_COMPAT_VDSO is not set
CONFIG_LEGACY_VSYSCALL_EMULATE=y
# CONFIG_LEGACY_VSYSCALL_XONLY is not set
# CONFIG_LEGACY_VSYSCALL_NONE is not set
# CONFIG_CMDLINE_BOOL is not set
CONFIG_MODIFY_LDT_SYSCALL=y
CONFIG_HAVE_LIVEPATCH=y
CONFIG_LIVEPATCH=y
# end of Processor type and features

CONFIG_ARCH_HAS_ADD_PAGES=y
CONFIG_ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE=y
CONFIG_USE_PERCPU_NUMA_NODE_ID=y

#
# Power management and ACPI options
#
CONFIG_ARCH_HIBERNATION_HEADER=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
CONFIG_HIBERNATE_CALLBACKS=y
CONFIG_HIBERNATION=y
CONFIG_HIBERNATION_SNAPSHOT_DEV=y
CONFIG_PM_STD_PARTITION=""
CONFIG_PM_SLEEP=y
CONFIG_PM_SLEEP_SMP=y
# CONFIG_PM_AUTOSLEEP is not set
# CONFIG_PM_WAKELOCKS is not set
CONFIG_PM=y
CONFIG_PM_DEBUG=y
# CONFIG_PM_ADVANCED_DEBUG is not set
# CONFIG_PM_TEST_SUSPEND is not set
CONFIG_PM_SLEEP_DEBUG=y
# CONFIG_PM_TRACE_RTC is not set
CONFIG_PM_CLK=y
# CONFIG_WQ_POWER_EFFICIENT_DEFAULT is not set
# CONFIG_ENERGY_MODEL is not set
CONFIG_ARCH_SUPPORTS_ACPI=y
CONFIG_ACPI=y
CONFIG_ACPI_LEGACY_TABLES_LOOKUP=y
CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC=y
CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT=y
# CONFIG_ACPI_DEBUGGER is not set
CONFIG_ACPI_SPCR_TABLE=y
# CONFIG_ACPI_FPDT is not set
CONFIG_ACPI_LPIT=y
CONFIG_ACPI_SLEEP=y
CONFIG_ACPI_REV_OVERRIDE_POSSIBLE=y
CONFIG_ACPI_EC_DEBUGFS=m
CONFIG_ACPI_AC=y
CONFIG_ACPI_BATTERY=y
CONFIG_ACPI_BUTTON=y
CONFIG_ACPI_VIDEO=m
CONFIG_ACPI_FAN=y
CONFIG_ACPI_TAD=m
CONFIG_ACPI_DOCK=y
CONFIG_ACPI_CPU_FREQ_PSS=y
CONFIG_ACPI_PROCESSOR_CSTATE=y
CONFIG_ACPI_PROCESSOR_IDLE=y
CONFIG_ACPI_CPPC_LIB=y
CONFIG_ACPI_PROCESSOR=y
CONFIG_ACPI_IPMI=m
CONFIG_ACPI_HOTPLUG_CPU=y
CONFIG_ACPI_PROCESSOR_AGGREGATOR=m
CONFIG_ACPI_THERMAL=y
CONFIG_ACPI_PLATFORM_PROFILE=m
CONFIG_ARCH_HAS_ACPI_TABLE_UPGRADE=y
CONFIG_ACPI_TABLE_UPGRADE=y
# CONFIG_ACPI_DEBUG is not set
CONFIG_ACPI_PCI_SLOT=y
CONFIG_ACPI_CONTAINER=y
CONFIG_ACPI_HOTPLUG_MEMORY=y
CONFIG_ACPI_HOTPLUG_IOAPIC=y
CONFIG_ACPI_SBS=m
CONFIG_ACPI_HED=y
# CONFIG_ACPI_CUSTOM_METHOD is not set
CONFIG_ACPI_BGRT=y
CONFIG_ACPI_NFIT=m
# CONFIG_NFIT_SECURITY_DEBUG is not set
CONFIG_ACPI_NUMA=y
# CONFIG_ACPI_HMAT is not set
CONFIG_HAVE_ACPI_APEI=y
CONFIG_HAVE_ACPI_APEI_NMI=y
CONFIG_ACPI_APEI=y
CONFIG_ACPI_APEI_GHES=y
CONFIG_ACPI_APEI_PCIEAER=y
CONFIG_ACPI_APEI_MEMORY_FAILURE=y
CONFIG_ACPI_APEI_EINJ=m
# CONFIG_ACPI_APEI_ERST_DEBUG is not set
# CONFIG_ACPI_DPTF is not set
CONFIG_ACPI_WATCHDOG=y
CONFIG_ACPI_EXTLOG=m
CONFIG_ACPI_ADXL=y
# CONFIG_ACPI_CONFIGFS is not set
CONFIG_PMIC_OPREGION=y
CONFIG_X86_PM_TIMER=y
CONFIG_ACPI_PRMT=y

#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_GOV_ATTR_SET=y
CONFIG_CPU_FREQ_GOV_COMMON=y
CONFIG_CPU_FREQ_STAT=y
CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y

#
# CPU frequency scaling drivers
#
CONFIG_X86_INTEL_PSTATE=y
# CONFIG_X86_PCC_CPUFREQ is not set
CONFIG_X86_ACPI_CPUFREQ=m
CONFIG_X86_ACPI_CPUFREQ_CPB=y
CONFIG_X86_POWERNOW_K8=m
# CONFIG_X86_AMD_FREQ_SENSITIVITY is not set
# CONFIG_X86_SPEEDSTEP_CENTRINO is not set
CONFIG_X86_P4_CLOCKMOD=m

#
# shared options
#
CONFIG_X86_SPEEDSTEP_LIB=m
# end of CPU Frequency scaling

#
# CPU Idle
#
CONFIG_CPU_IDLE=y
# CONFIG_CPU_IDLE_GOV_LADDER is not set
CONFIG_CPU_IDLE_GOV_MENU=y
# CONFIG_CPU_IDLE_GOV_TEO is not set
# CONFIG_CPU_IDLE_GOV_HALTPOLL is not set
CONFIG_HALTPOLL_CPUIDLE=y
# end of CPU Idle

CONFIG_INTEL_IDLE=y
# end of Power management and ACPI options

#
# Bus options (PCI etc.)
#
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_MMCONF_FAM10H=y
CONFIG_ISA_DMA_API=y
CONFIG_AMD_NB=y
# end of Bus options (PCI etc.)

#
# Binary Emulations
#
CONFIG_IA32_EMULATION=y
# CONFIG_X86_X32 is not set
CONFIG_COMPAT_32=y
CONFIG_COMPAT=y
CONFIG_COMPAT_FOR_U64_ALIGNMENT=y
CONFIG_SYSVIPC_COMPAT=y
# end of Binary Emulations

#
# Firmware Drivers
#

#
# ARM System Control and Management Interface Protocol
#
# end of ARM System Control and Management Interface Protocol

CONFIG_EDD=m
# CONFIG_EDD_OFF is not set
CONFIG_FIRMWARE_MEMMAP=y
CONFIG_DMIID=y
CONFIG_DMI_SYSFS=y
CONFIG_DMI_SCAN_MACHINE_NON_EFI_FALLBACK=y
# CONFIG_ISCSI_IBFT is not set
CONFIG_FW_CFG_SYSFS=y
# CONFIG_FW_CFG_SYSFS_CMDLINE is not set
CONFIG_SYSFB=y
# CONFIG_SYSFB_SIMPLEFB is not set
# CONFIG_GOOGLE_FIRMWARE is not set

#
# EFI (Extensible Firmware Interface) Support
#
CONFIG_EFI_VARS=y
CONFIG_EFI_ESRT=y
CONFIG_EFI_VARS_PSTORE=y
CONFIG_EFI_VARS_PSTORE_DEFAULT_DISABLE=y
CONFIG_EFI_RUNTIME_MAP=y
# CONFIG_EFI_FAKE_MEMMAP is not set
CONFIG_EFI_RUNTIME_WRAPPERS=y
CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER=y
# CONFIG_EFI_BOOTLOADER_CONTROL is not set
# CONFIG_EFI_CAPSULE_LOADER is not set
# CONFIG_EFI_TEST is not set
CONFIG_APPLE_PROPERTIES=y
# CONFIG_RESET_ATTACK_MITIGATION is not set
# CONFIG_EFI_RCI2_TABLE is not set
# CONFIG_EFI_DISABLE_PCI_DMA is not set
# end of EFI (Extensible Firmware Interface) Support

CONFIG_UEFI_CPER=y
CONFIG_UEFI_CPER_X86=y
CONFIG_EFI_DEV_PATH_PARSER=y
CONFIG_EFI_EARLYCON=y
CONFIG_EFI_CUSTOM_SSDT_OVERLAYS=y

#
# Tegra firmware driver
#
# end of Tegra firmware driver
# end of Firmware Drivers

CONFIG_HAVE_KVM=y
CONFIG_HAVE_KVM_IRQCHIP=y
CONFIG_HAVE_KVM_IRQFD=y
CONFIG_HAVE_KVM_IRQ_ROUTING=y
CONFIG_HAVE_KVM_EVENTFD=y
CONFIG_KVM_MMIO=y
CONFIG_KVM_ASYNC_PF=y
CONFIG_HAVE_KVM_MSI=y
CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT=y
CONFIG_KVM_VFIO=y
CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT=y
CONFIG_KVM_COMPAT=y
CONFIG_HAVE_KVM_IRQ_BYPASS=y
CONFIG_HAVE_KVM_NO_POLL=y
CONFIG_KVM_XFER_TO_GUEST_WORK=y
CONFIG_HAVE_KVM_PM_NOTIFIER=y
CONFIG_VIRTUALIZATION=y
CONFIG_KVM=m
CONFIG_KVM_INTEL=m
# CONFIG_KVM_AMD is not set
# CONFIG_KVM_XEN is not set
CONFIG_KVM_MMU_AUDIT=y
CONFIG_AS_AVX512=y
CONFIG_AS_SHA1_NI=y
CONFIG_AS_SHA256_NI=y
CONFIG_AS_TPAUSE=y

#
# General architecture-dependent options
#
CONFIG_CRASH_CORE=y
CONFIG_KEXEC_CORE=y
CONFIG_HOTPLUG_SMT=y
CONFIG_GENERIC_ENTRY=y
CONFIG_KPROBES=y
CONFIG_JUMP_LABEL=y
# CONFIG_STATIC_KEYS_SELFTEST is not set
# CONFIG_STATIC_CALL_SELFTEST is not set
CONFIG_OPTPROBES=y
CONFIG_KPROBES_ON_FTRACE=y
CONFIG_UPROBES=y
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_ARCH_USE_BUILTIN_BSWAP=y
CONFIG_KRETPROBES=y
CONFIG_USER_RETURN_NOTIFIER=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_OPTPROBES=y
CONFIG_HAVE_KPROBES_ON_FTRACE=y
CONFIG_HAVE_FUNCTION_ERROR_INJECTION=y
CONFIG_HAVE_NMI=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_HAVE_DMA_CONTIGUOUS=y
CONFIG_GENERIC_SMP_IDLE_THREAD=y
CONFIG_ARCH_HAS_FORTIFY_SOURCE=y
CONFIG_ARCH_HAS_SET_MEMORY=y
CONFIG_ARCH_HAS_SET_DIRECT_MAP=y
CONFIG_HAVE_ARCH_THREAD_STRUCT_WHITELIST=y
CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT=y
CONFIG_ARCH_WANTS_NO_INSTR=y
CONFIG_HAVE_ASM_MODVERSIONS=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_RSEQ=y
CONFIG_HAVE_FUNCTION_ARG_ACCESS_API=y
CONFIG_HAVE_HW_BREAKPOINT=y
CONFIG_HAVE_MIXED_BREAKPOINTS_REGS=y
CONFIG_HAVE_USER_RETURN_NOTIFIER=y
CONFIG_HAVE_PERF_EVENTS_NMI=y
CONFIG_HAVE_HARDLOCKUP_DETECTOR_PERF=y
CONFIG_HAVE_PERF_REGS=y
CONFIG_HAVE_PERF_USER_STACK_DUMP=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_HAVE_ARCH_JUMP_LABEL_RELATIVE=y
CONFIG_MMU_GATHER_TABLE_FREE=y
CONFIG_MMU_GATHER_RCU_TABLE_FREE=y
CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG=y
CONFIG_HAVE_ALIGNED_STRUCT_PAGE=y
CONFIG_HAVE_CMPXCHG_LOCAL=y
CONFIG_HAVE_CMPXCHG_DOUBLE=y
CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION=y
CONFIG_ARCH_WANT_OLD_COMPAT_IPC=y
CONFIG_HAVE_ARCH_SECCOMP=y
CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
CONFIG_SECCOMP=y
CONFIG_SECCOMP_FILTER=y
# CONFIG_SECCOMP_CACHE_DEBUG is not set
CONFIG_HAVE_ARCH_STACKLEAK=y
CONFIG_HAVE_STACKPROTECTOR=y
CONFIG_STACKPROTECTOR=y
CONFIG_STACKPROTECTOR_STRONG=y
CONFIG_ARCH_SUPPORTS_LTO_CLANG=y
CONFIG_ARCH_SUPPORTS_LTO_CLANG_THIN=y
CONFIG_LTO_NONE=y
CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES=y
CONFIG_HAVE_CONTEXT_TRACKING=y
CONFIG_HAVE_CONTEXT_TRACKING_OFFSTACK=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
CONFIG_HAVE_MOVE_PUD=y
CONFIG_HAVE_MOVE_PMD=y
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD=y
CONFIG_HAVE_ARCH_HUGE_VMAP=y
CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y
CONFIG_HAVE_ARCH_SOFT_DIRTY=y
CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
CONFIG_MODULES_USE_ELF_RELA=y
CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y
CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK=y
CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
CONFIG_HAVE_EXIT_THREAD=y
CONFIG_ARCH_MMAP_RND_BITS=28
CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS=y
CONFIG_ARCH_MMAP_RND_COMPAT_BITS=8
CONFIG_HAVE_ARCH_COMPAT_MMAP_BASES=y
CONFIG_HAVE_STACK_VALIDATION=y
CONFIG_HAVE_RELIABLE_STACKTRACE=y
CONFIG_OLD_SIGSUSPEND3=y
CONFIG_COMPAT_OLD_SIGACTION=y
CONFIG_COMPAT_32BIT_TIME=y
CONFIG_HAVE_ARCH_VMAP_STACK=y
CONFIG_VMAP_STACK=y
CONFIG_HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET=y
# CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT is not set
CONFIG_ARCH_HAS_STRICT_KERNEL_RWX=y
CONFIG_STRICT_KERNEL_RWX=y
CONFIG_ARCH_HAS_STRICT_MODULE_RWX=y
CONFIG_STRICT_MODULE_RWX=y
CONFIG_HAVE_ARCH_PREL32_RELOCATIONS=y
CONFIG_ARCH_USE_MEMREMAP_PROT=y
# CONFIG_LOCK_EVENT_COUNTS is not set
CONFIG_ARCH_HAS_MEM_ENCRYPT=y
CONFIG_HAVE_STATIC_CALL=y
CONFIG_HAVE_STATIC_CALL_INLINE=y
CONFIG_HAVE_PREEMPT_DYNAMIC=y
CONFIG_ARCH_WANT_LD_ORPHAN_WARN=y
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_ARCH_HAS_ELFCORE_COMPAT=y
CONFIG_ARCH_HAS_PARANOID_L1D_FLUSH=y

#
# GCOV-based kernel profiling
#
# CONFIG_GCOV_KERNEL is not set
CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
# end of GCOV-based kernel profiling

CONFIG_HAVE_GCC_PLUGINS=y
# end of General architecture-dependent options

CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULE_SIG_FORMAT=y
CONFIG_MODULES=y
CONFIG_MODULE_FORCE_LOAD=y
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_MODULE_SIG=y
# CONFIG_MODULE_SIG_FORCE is not set
CONFIG_MODULE_SIG_ALL=y
# CONFIG_MODULE_SIG_SHA1 is not set
# CONFIG_MODULE_SIG_SHA224 is not set
CONFIG_MODULE_SIG_SHA256=y
# CONFIG_MODULE_SIG_SHA384 is not set
# CONFIG_MODULE_SIG_SHA512 is not set
CONFIG_MODULE_SIG_HASH="sha256"
CONFIG_MODULE_COMPRESS_NONE=y
# CONFIG_MODULE_COMPRESS_GZIP is not set
# CONFIG_MODULE_COMPRESS_XZ is not set
# CONFIG_MODULE_COMPRESS_ZSTD is not set
# CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS is not set
CONFIG_MODPROBE_PATH="/sbin/modprobe"
CONFIG_MODULES_TREE_LOOKUP=y
CONFIG_BLOCK=y
CONFIG_BLK_CGROUP_RWSTAT=y
CONFIG_BLK_DEV_BSG_COMMON=y
CONFIG_BLK_DEV_BSGLIB=y
CONFIG_BLK_DEV_INTEGRITY=y
CONFIG_BLK_DEV_INTEGRITY_T10=m
CONFIG_BLK_DEV_ZONED=y
CONFIG_BLK_DEV_THROTTLING=y
# CONFIG_BLK_DEV_THROTTLING_LOW is not set
CONFIG_BLK_WBT=y
CONFIG_BLK_WBT_MQ=y
# CONFIG_BLK_CGROUP_IOLATENCY is not set
# CONFIG_BLK_CGROUP_FC_APPID is not set
# CONFIG_BLK_CGROUP_IOCOST is not set
# CONFIG_BLK_CGROUP_IOPRIO is not set
CONFIG_BLK_DEBUG_FS=y
CONFIG_BLK_DEBUG_FS_ZONED=y
# CONFIG_BLK_SED_OPAL is not set
# CONFIG_BLK_INLINE_ENCRYPTION is not set

#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
# CONFIG_AIX_PARTITION is not set
CONFIG_OSF_PARTITION=y
CONFIG_AMIGA_PARTITION=y
# CONFIG_ATARI_PARTITION is not set
CONFIG_MAC_PARTITION=y
CONFIG_MSDOS_PARTITION=y
CONFIG_BSD_DISKLABEL=y
CONFIG_MINIX_SUBPARTITION=y
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
# CONFIG_LDM_PARTITION is not set
CONFIG_SGI_PARTITION=y
# CONFIG_ULTRIX_PARTITION is not set
CONFIG_SUN_PARTITION=y
CONFIG_KARMA_PARTITION=y
CONFIG_EFI_PARTITION=y
# CONFIG_SYSV68_PARTITION is not set
# CONFIG_CMDLINE_PARTITION is not set
# end of Partition Types

CONFIG_BLOCK_COMPAT=y
CONFIG_BLK_MQ_PCI=y
CONFIG_BLK_MQ_VIRTIO=y
CONFIG_BLK_MQ_RDMA=y
CONFIG_BLK_PM=y
CONFIG_BLOCK_HOLDER_DEPRECATED=y

#
# IO Schedulers
#
CONFIG_MQ_IOSCHED_DEADLINE=y
CONFIG_MQ_IOSCHED_KYBER=y
CONFIG_IOSCHED_BFQ=y
CONFIG_BFQ_GROUP_IOSCHED=y
# CONFIG_BFQ_CGROUP_DEBUG is not set
# end of IO Schedulers

CONFIG_PREEMPT_NOTIFIERS=y
CONFIG_PADATA=y
CONFIG_ASN1=y
CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_INLINE_READ_UNLOCK=y
CONFIG_INLINE_READ_UNLOCK_IRQ=y
CONFIG_INLINE_WRITE_UNLOCK=y
CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
CONFIG_MUTEX_SPIN_ON_OWNER=y
CONFIG_RWSEM_SPIN_ON_OWNER=y
CONFIG_LOCK_SPIN_ON_OWNER=y
CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y
CONFIG_QUEUED_SPINLOCKS=y
CONFIG_ARCH_USE_QUEUED_RWLOCKS=y
CONFIG_QUEUED_RWLOCKS=y
CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE=y
CONFIG_ARCH_HAS_SYNC_CORE_BEFORE_USERMODE=y
CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y
CONFIG_FREEZER=y

#
# Executable file formats
#
CONFIG_BINFMT_ELF=y
CONFIG_COMPAT_BINFMT_ELF=y
CONFIG_ELFCORE=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_BINFMT_SCRIPT=y
CONFIG_BINFMT_MISC=m
CONFIG_COREDUMP=y
# end of Executable file formats

#
# Memory Management options
#
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_SPARSEMEM_MANUAL=y
CONFIG_SPARSEMEM=y
CONFIG_SPARSEMEM_EXTREME=y
CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
CONFIG_SPARSEMEM_VMEMMAP=y
CONFIG_HAVE_FAST_GUP=y
CONFIG_NUMA_KEEP_MEMINFO=y
CONFIG_MEMORY_ISOLATION=y
CONFIG_HAVE_BOOTMEM_INFO_NODE=y
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_MEMORY_HOTPLUG=y
CONFIG_MEMORY_HOTPLUG_SPARSE=y
# CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE is not set
CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
CONFIG_MEMORY_HOTREMOVE=y
CONFIG_MHP_MEMMAP_ON_MEMORY=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK=y
CONFIG_MEMORY_BALLOON=y
CONFIG_BALLOON_COMPACTION=y
CONFIG_COMPACTION=y
CONFIG_PAGE_REPORTING=y
CONFIG_MIGRATION=y
CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y
CONFIG_ARCH_ENABLE_THP_MIGRATION=y
CONFIG_CONTIG_ALLOC=y
CONFIG_PHYS_ADDR_T_64BIT=y
CONFIG_VIRT_TO_BUS=y
CONFIG_MMU_NOTIFIER=y
CONFIG_KSM=y
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
CONFIG_MEMORY_FAILURE=y
CONFIG_HWPOISON_INJECT=m
CONFIG_TRANSPARENT_HUGEPAGE=y
CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y
# CONFIG_TRANSPARENT_HUGEPAGE_MADVISE is not set
CONFIG_ARCH_WANTS_THP_SWAP=y
CONFIG_THP_SWAP=y
CONFIG_CLEANCACHE=y
CONFIG_FRONTSWAP=y
CONFIG_CMA=y
# CONFIG_CMA_DEBUG is not set
# CONFIG_CMA_DEBUGFS is not set
# CONFIG_CMA_SYSFS is not set
CONFIG_CMA_AREAS=19
# CONFIG_MEM_SOFT_DIRTY is not set
CONFIG_ZSWAP=y
# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_DEFLATE is not set
CONFIG_ZSWAP_COMPRESSOR_DEFAULT_LZO=y
# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_842 is not set
# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_LZ4 is not set
# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_LZ4HC is not set
# CONFIG_ZSWAP_COMPRESSOR_DEFAULT_ZSTD is not set
CONFIG_ZSWAP_COMPRESSOR_DEFAULT="lzo"
CONFIG_ZSWAP_ZPOOL_DEFAULT_ZBUD=y
# CONFIG_ZSWAP_ZPOOL_DEFAULT_Z3FOLD is not set
# CONFIG_ZSWAP_ZPOOL_DEFAULT_ZSMALLOC is not set
CONFIG_ZSWAP_ZPOOL_DEFAULT="zbud"
# CONFIG_ZSWAP_DEFAULT_ON is not set
CONFIG_ZPOOL=y
CONFIG_ZBUD=y
# CONFIG_Z3FOLD is not set
CONFIG_ZSMALLOC=y
CONFIG_ZSMALLOC_STAT=y
CONFIG_GENERIC_EARLY_IOREMAP=y
CONFIG_DEFERRED_STRUCT_PAGE_INIT=y
CONFIG_IDLE_PAGE_TRACKING=y
CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
CONFIG_ARCH_HAS_PTE_DEVMAP=y
CONFIG_ZONE_DMA=y
CONFIG_ZONE_DMA32=y
CONFIG_ZONE_DEVICE=y
CONFIG_DEV_PAGEMAP_OPS=y
CONFIG_HMM_MIRROR=y
CONFIG_DEVICE_PRIVATE=y
CONFIG_VMAP_PFN=y
CONFIG_ARCH_USES_HIGH_VMA_FLAGS=y
CONFIG_ARCH_HAS_PKEYS=y
# CONFIG_PERCPU_STATS is not set
# CONFIG_GUP_TEST is not set
# CONFIG_READ_ONLY_THP_FOR_FS is not set
CONFIG_ARCH_HAS_PTE_SPECIAL=y
CONFIG_SECRETMEM=y
# end of Memory Management options

CONFIG_NET=y
CONFIG_COMPAT_NETLINK_MESSAGES=y
CONFIG_NET_INGRESS=y
CONFIG_NET_EGRESS=y
CONFIG_SKB_EXTENSIONS=y

#
# Networking options
#
CONFIG_PACKET=y
CONFIG_PACKET_DIAG=m
CONFIG_UNIX=y
CONFIG_UNIX_SCM=y
CONFIG_AF_UNIX_OOB=y
CONFIG_UNIX_DIAG=m
CONFIG_TLS=m
CONFIG_TLS_DEVICE=y
# CONFIG_TLS_TOE is not set
CONFIG_XFRM=y
CONFIG_XFRM_OFFLOAD=y
CONFIG_XFRM_ALGO=y
CONFIG_XFRM_USER=y
# CONFIG_XFRM_USER_COMPAT is not set
# CONFIG_XFRM_INTERFACE is not set
CONFIG_XFRM_SUB_POLICY=y
CONFIG_XFRM_MIGRATE=y
CONFIG_XFRM_STATISTICS=y
CONFIG_XFRM_AH=m
CONFIG_XFRM_ESP=m
CONFIG_XFRM_IPCOMP=m
CONFIG_NET_KEY=m
CONFIG_NET_KEY_MIGRATE=y
# CONFIG_SMC is not set
CONFIG_XDP_SOCKETS=y
# CONFIG_XDP_SOCKETS_DIAG is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_IP_FIB_TRIE_STATS=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_ROUTE_CLASSID=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
# CONFIG_IP_PNP_BOOTP is not set
# CONFIG_IP_PNP_RARP is not set
CONFIG_NET_IPIP=m
CONFIG_NET_IPGRE_DEMUX=m
CONFIG_NET_IP_TUNNEL=m
CONFIG_NET_IPGRE=m
CONFIG_NET_IPGRE_BROADCAST=y
CONFIG_IP_MROUTE_COMMON=y
CONFIG_IP_MROUTE=y
CONFIG_IP_MROUTE_MULTIPLE_TABLES=y
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
CONFIG_SYN_COOKIES=y
CONFIG_NET_IPVTI=m
CONFIG_NET_UDP_TUNNEL=m
# CONFIG_NET_FOU is not set
# CONFIG_NET_FOU_IP_TUNNELS is not set
CONFIG_INET_AH=m
CONFIG_INET_ESP=m
CONFIG_INET_ESP_OFFLOAD=m
# CONFIG_INET_ESPINTCP is not set
CONFIG_INET_IPCOMP=m
CONFIG_INET_XFRM_TUNNEL=m
CONFIG_INET_TUNNEL=m
CONFIG_INET_DIAG=m
CONFIG_INET_TCP_DIAG=m
CONFIG_INET_UDP_DIAG=m
CONFIG_INET_RAW_DIAG=m
# CONFIG_INET_DIAG_DESTROY is not set
CONFIG_TCP_CONG_ADVANCED=y
CONFIG_TCP_CONG_BIC=m
CONFIG_TCP_CONG_CUBIC=y
CONFIG_TCP_CONG_WESTWOOD=m
CONFIG_TCP_CONG_HTCP=m
CONFIG_TCP_CONG_HSTCP=m
CONFIG_TCP_CONG_HYBLA=m
CONFIG_TCP_CONG_VEGAS=m
CONFIG_TCP_CONG_NV=m
CONFIG_TCP_CONG_SCALABLE=m
CONFIG_TCP_CONG_LP=m
CONFIG_TCP_CONG_VENO=m
CONFIG_TCP_CONG_YEAH=m
CONFIG_TCP_CONG_ILLINOIS=m
CONFIG_TCP_CONG_DCTCP=m
# CONFIG_TCP_CONG_CDG is not set
CONFIG_TCP_CONG_BBR=m
CONFIG_DEFAULT_CUBIC=y
# CONFIG_DEFAULT_RENO is not set
CONFIG_DEFAULT_TCP_CONG="cubic"
CONFIG_TCP_MD5SIG=y
CONFIG_IPV6=y
CONFIG_IPV6_ROUTER_PREF=y
CONFIG_IPV6_ROUTE_INFO=y
CONFIG_IPV6_OPTIMISTIC_DAD=y
CONFIG_INET6_AH=m
CONFIG_INET6_ESP=m
CONFIG_INET6_ESP_OFFLOAD=m
# CONFIG_INET6_ESPINTCP is not set
CONFIG_INET6_IPCOMP=m
CONFIG_IPV6_MIP6=m
# CONFIG_IPV6_ILA is not set
CONFIG_INET6_XFRM_TUNNEL=m
CONFIG_INET6_TUNNEL=m
CONFIG_IPV6_VTI=m
CONFIG_IPV6_SIT=m
CONFIG_IPV6_SIT_6RD=y
CONFIG_IPV6_NDISC_NODETYPE=y
CONFIG_IPV6_TUNNEL=m
CONFIG_IPV6_GRE=m
CONFIG_IPV6_MULTIPLE_TABLES=y
# CONFIG_IPV6_SUBTREES is not set
CONFIG_IPV6_MROUTE=y
CONFIG_IPV6_MROUTE_MULTIPLE_TABLES=y
CONFIG_IPV6_PIMSM_V2=y
# CONFIG_IPV6_SEG6_LWTUNNEL is not set
# CONFIG_IPV6_SEG6_HMAC is not set
# CONFIG_IPV6_RPL_LWTUNNEL is not set
# CONFIG_IPV6_IOAM6_LWTUNNEL is not set
CONFIG_NETLABEL=y
CONFIG_MPTCP=y
CONFIG_INET_MPTCP_DIAG=m
CONFIG_MPTCP_IPV6=y
CONFIG_MPTCP_KUNIT_TEST=m
CONFIG_NETWORK_SECMARK=y
CONFIG_NET_PTP_CLASSIFY=y
CONFIG_NETWORK_PHY_TIMESTAMPING=y
CONFIG_NETFILTER=y
CONFIG_NETFILTER_ADVANCED=y
CONFIG_BRIDGE_NETFILTER=m

#
# Core Netfilter Configuration
#
CONFIG_NETFILTER_INGRESS=y
CONFIG_NETFILTER_NETLINK=m
CONFIG_NETFILTER_FAMILY_BRIDGE=y
CONFIG_NETFILTER_FAMILY_ARP=y
# CONFIG_NETFILTER_NETLINK_HOOK is not set
# CONFIG_NETFILTER_NETLINK_ACCT is not set
CONFIG_NETFILTER_NETLINK_QUEUE=m
CONFIG_NETFILTER_NETLINK_LOG=m
CONFIG_NETFILTER_NETLINK_OSF=m
CONFIG_NF_CONNTRACK=m
CONFIG_NF_LOG_SYSLOG=m
CONFIG_NETFILTER_CONNCOUNT=m
CONFIG_NF_CONNTRACK_MARK=y
CONFIG_NF_CONNTRACK_SECMARK=y
CONFIG_NF_CONNTRACK_ZONES=y
CONFIG_NF_CONNTRACK_PROCFS=y
CONFIG_NF_CONNTRACK_EVENTS=y
CONFIG_NF_CONNTRACK_TIMEOUT=y
CONFIG_NF_CONNTRACK_TIMESTAMP=y
CONFIG_NF_CONNTRACK_LABELS=y
CONFIG_NF_CT_PROTO_DCCP=y
CONFIG_NF_CT_PROTO_GRE=y
CONFIG_NF_CT_PROTO_SCTP=y
CONFIG_NF_CT_PROTO_UDPLITE=y
CONFIG_NF_CONNTRACK_AMANDA=m
CONFIG_NF_CONNTRACK_FTP=m
CONFIG_NF_CONNTRACK_H323=m
CONFIG_NF_CONNTRACK_IRC=m
CONFIG_NF_CONNTRACK_BROADCAST=m
CONFIG_NF_CONNTRACK_NETBIOS_NS=m
CONFIG_NF_CONNTRACK_SNMP=m
CONFIG_NF_CONNTRACK_PPTP=m
CONFIG_NF_CONNTRACK_SANE=m
CONFIG_NF_CONNTRACK_SIP=m
CONFIG_NF_CONNTRACK_TFTP=m
CONFIG_NF_CT_NETLINK=m
CONFIG_NF_CT_NETLINK_TIMEOUT=m
CONFIG_NF_CT_NETLINK_HELPER=m
CONFIG_NETFILTER_NETLINK_GLUE_CT=y
CONFIG_NF_NAT=m
CONFIG_NF_NAT_AMANDA=m
CONFIG_NF_NAT_FTP=m
CONFIG_NF_NAT_IRC=m
CONFIG_NF_NAT_SIP=m
CONFIG_NF_NAT_TFTP=m
CONFIG_NF_NAT_REDIRECT=y
CONFIG_NF_NAT_MASQUERADE=y
CONFIG_NETFILTER_SYNPROXY=m
CONFIG_NF_TABLES=m
CONFIG_NF_TABLES_INET=y
CONFIG_NF_TABLES_NETDEV=y
CONFIG_NFT_NUMGEN=m
CONFIG_NFT_CT=m
CONFIG_NFT_COUNTER=m
CONFIG_NFT_CONNLIMIT=m
CONFIG_NFT_LOG=m
CONFIG_NFT_LIMIT=m
CONFIG_NFT_MASQ=m
CONFIG_NFT_REDIR=m
CONFIG_NFT_NAT=m
# CONFIG_NFT_TUNNEL is not set
CONFIG_NFT_OBJREF=m
CONFIG_NFT_QUEUE=m
CONFIG_NFT_QUOTA=m
CONFIG_NFT_REJECT=m
CONFIG_NFT_REJECT_INET=m
CONFIG_NFT_COMPAT=m
CONFIG_NFT_HASH=m
CONFIG_NFT_FIB=m
CONFIG_NFT_FIB_INET=m
# CONFIG_NFT_XFRM is not set
CONFIG_NFT_SOCKET=m
# CONFIG_NFT_OSF is not set
# CONFIG_NFT_TPROXY is not set
# CONFIG_NFT_SYNPROXY is not set
CONFIG_NF_DUP_NETDEV=m
CONFIG_NFT_DUP_NETDEV=m
CONFIG_NFT_FWD_NETDEV=m
CONFIG_NFT_FIB_NETDEV=m
# CONFIG_NFT_REJECT_NETDEV is not set
# CONFIG_NF_FLOW_TABLE is not set
CONFIG_NETFILTER_XTABLES=y
CONFIG_NETFILTER_XTABLES_COMPAT=y

#
# Xtables combined modules
#
CONFIG_NETFILTER_XT_MARK=m
CONFIG_NETFILTER_XT_CONNMARK=m
CONFIG_NETFILTER_XT_SET=m

#
# Xtables targets
#
CONFIG_NETFILTER_XT_TARGET_AUDIT=m
CONFIG_NETFILTER_XT_TARGET_CHECKSUM=m
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
CONFIG_NETFILTER_XT_TARGET_CONNMARK=m
CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=m
CONFIG_NETFILTER_XT_TARGET_CT=m
CONFIG_NETFILTER_XT_TARGET_DSCP=m
CONFIG_NETFILTER_XT_TARGET_HL=m
CONFIG_NETFILTER_XT_TARGET_HMARK=m
CONFIG_NETFILTER_XT_TARGET_IDLETIMER=m
# CONFIG_NETFILTER_XT_TARGET_LED is not set
CONFIG_NETFILTER_XT_TARGET_LOG=m
CONFIG_NETFILTER_XT_TARGET_MARK=m
CONFIG_NETFILTER_XT_NAT=m
CONFIG_NETFILTER_XT_TARGET_NETMAP=m
CONFIG_NETFILTER_XT_TARGET_NFLOG=m
CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m
CONFIG_NETFILTER_XT_TARGET_NOTRACK=m
CONFIG_NETFILTER_XT_TARGET_RATEEST=m
CONFIG_NETFILTER_XT_TARGET_REDIRECT=m
CONFIG_NETFILTER_XT_TARGET_MASQUERADE=m
CONFIG_NETFILTER_XT_TARGET_TEE=m
CONFIG_NETFILTER_XT_TARGET_TPROXY=m
CONFIG_NETFILTER_XT_TARGET_TRACE=m
CONFIG_NETFILTER_XT_TARGET_SECMARK=m
CONFIG_NETFILTER_XT_TARGET_TCPMSS=m
CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP=m

#
# Xtables matches
#
CONFIG_NETFILTER_XT_MATCH_ADDRTYPE=m
CONFIG_NETFILTER_XT_MATCH_BPF=m
CONFIG_NETFILTER_XT_MATCH_CGROUP=m
CONFIG_NETFILTER_XT_MATCH_CLUSTER=m
CONFIG_NETFILTER_XT_MATCH_COMMENT=m
CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m
CONFIG_NETFILTER_XT_MATCH_CONNLABEL=m
CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=m
CONFIG_NETFILTER_XT_MATCH_CONNMARK=m
CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m
CONFIG_NETFILTER_XT_MATCH_CPU=m
CONFIG_NETFILTER_XT_MATCH_DCCP=m
CONFIG_NETFILTER_XT_MATCH_DEVGROUP=m
CONFIG_NETFILTER_XT_MATCH_DSCP=m
CONFIG_NETFILTER_XT_MATCH_ECN=m
CONFIG_NETFILTER_XT_MATCH_ESP=m
CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=m
CONFIG_NETFILTER_XT_MATCH_HELPER=m
CONFIG_NETFILTER_XT_MATCH_HL=m
# CONFIG_NETFILTER_XT_MATCH_IPCOMP is not set
CONFIG_NETFILTER_XT_MATCH_IPRANGE=m
CONFIG_NETFILTER_XT_MATCH_IPVS=m
# CONFIG_NETFILTER_XT_MATCH_L2TP is not set
CONFIG_NETFILTER_XT_MATCH_LENGTH=m
CONFIG_NETFILTER_XT_MATCH_LIMIT=m
CONFIG_NETFILTER_XT_MATCH_MAC=m
CONFIG_NETFILTER_XT_MATCH_MARK=m
CONFIG_NETFILTER_XT_MATCH_MULTIPORT=m
# CONFIG_NETFILTER_XT_MATCH_NFACCT is not set
CONFIG_NETFILTER_XT_MATCH_OSF=m
CONFIG_NETFILTER_XT_MATCH_OWNER=m
CONFIG_NETFILTER_XT_MATCH_POLICY=m
CONFIG_NETFILTER_XT_MATCH_PHYSDEV=m
CONFIG_NETFILTER_XT_MATCH_PKTTYPE=m
CONFIG_NETFILTER_XT_MATCH_QUOTA=m
CONFIG_NETFILTER_XT_MATCH_RATEEST=m
CONFIG_NETFILTER_XT_MATCH_REALM=m
CONFIG_NETFILTER_XT_MATCH_RECENT=m
CONFIG_NETFILTER_XT_MATCH_SCTP=m
CONFIG_NETFILTER_XT_MATCH_SOCKET=m
CONFIG_NETFILTER_XT_MATCH_STATE=m
CONFIG_NETFILTER_XT_MATCH_STATISTIC=m
CONFIG_NETFILTER_XT_MATCH_STRING=m
CONFIG_NETFILTER_XT_MATCH_TCPMSS=m
# CONFIG_NETFILTER_XT_MATCH_TIME is not set
# CONFIG_NETFILTER_XT_MATCH_U32 is not set
# end of Core Netfilter Configuration

CONFIG_IP_SET=m
CONFIG_IP_SET_MAX=256
CONFIG_IP_SET_BITMAP_IP=m
CONFIG_IP_SET_BITMAP_IPMAC=m
CONFIG_IP_SET_BITMAP_PORT=m
CONFIG_IP_SET_HASH_IP=m
CONFIG_IP_SET_HASH_IPMARK=m
CONFIG_IP_SET_HASH_IPPORT=m
CONFIG_IP_SET_HASH_IPPORTIP=m
CONFIG_IP_SET_HASH_IPPORTNET=m
CONFIG_IP_SET_HASH_IPMAC=m
CONFIG_IP_SET_HASH_MAC=m
CONFIG_IP_SET_HASH_NETPORTNET=m
CONFIG_IP_SET_HASH_NET=m
CONFIG_IP_SET_HASH_NETNET=m
CONFIG_IP_SET_HASH_NETPORT=m
CONFIG_IP_SET_HASH_NETIFACE=m
CONFIG_IP_SET_LIST_SET=m
CONFIG_IP_VS=m
CONFIG_IP_VS_IPV6=y
# CONFIG_IP_VS_DEBUG is not set
CONFIG_IP_VS_TAB_BITS=12

#
# IPVS transport protocol load balancing support
#
CONFIG_IP_VS_PROTO_TCP=y
CONFIG_IP_VS_PROTO_UDP=y
CONFIG_IP_VS_PROTO_AH_ESP=y
CONFIG_IP_VS_PROTO_ESP=y
CONFIG_IP_VS_PROTO_AH=y
CONFIG_IP_VS_PROTO_SCTP=y

#
# IPVS scheduler
#
CONFIG_IP_VS_RR=m
CONFIG_IP_VS_WRR=m
CONFIG_IP_VS_LC=m
CONFIG_IP_VS_WLC=m
CONFIG_IP_VS_FO=m
CONFIG_IP_VS_OVF=m
CONFIG_IP_VS_LBLC=m
CONFIG_IP_VS_LBLCR=m
CONFIG_IP_VS_DH=m
CONFIG_IP_VS_SH=m
# CONFIG_IP_VS_MH is not set
CONFIG_IP_VS_SED=m
CONFIG_IP_VS_NQ=m
# CONFIG_IP_VS_TWOS is not set

#
# IPVS SH scheduler
#
CONFIG_IP_VS_SH_TAB_BITS=8

#
# IPVS MH scheduler
#
CONFIG_IP_VS_MH_TAB_INDEX=12

#
# IPVS application helper
#
CONFIG_IP_VS_FTP=m
CONFIG_IP_VS_NFCT=y
CONFIG_IP_VS_PE_SIP=m

#
# IP: Netfilter Configuration
#
CONFIG_NF_DEFRAG_IPV4=m
CONFIG_NF_SOCKET_IPV4=m
CONFIG_NF_TPROXY_IPV4=m
CONFIG_NF_TABLES_IPV4=y
CONFIG_NFT_REJECT_IPV4=m
CONFIG_NFT_DUP_IPV4=m
CONFIG_NFT_FIB_IPV4=m
CONFIG_NF_TABLES_ARP=y
CONFIG_NF_DUP_IPV4=m
CONFIG_NF_LOG_ARP=m
CONFIG_NF_LOG_IPV4=m
CONFIG_NF_REJECT_IPV4=m
CONFIG_NF_NAT_SNMP_BASIC=m
CONFIG_NF_NAT_PPTP=m
CONFIG_NF_NAT_H323=m
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_AH=m
CONFIG_IP_NF_MATCH_ECN=m
CONFIG_IP_NF_MATCH_RPFILTER=m
CONFIG_IP_NF_MATCH_TTL=m
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP_NF_TARGET_SYNPROXY=m
CONFIG_IP_NF_NAT=m
CONFIG_IP_NF_TARGET_MASQUERADE=m
CONFIG_IP_NF_TARGET_NETMAP=m
CONFIG_IP_NF_TARGET_REDIRECT=m
CONFIG_IP_NF_MANGLE=m
# CONFIG_IP_NF_TARGET_CLUSTERIP is not set
CONFIG_IP_NF_TARGET_ECN=m
CONFIG_IP_NF_TARGET_TTL=m
CONFIG_IP_NF_RAW=m
CONFIG_IP_NF_SECURITY=m
CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
# end of IP: Netfilter Configuration

#
# IPv6: Netfilter Configuration
#
CONFIG_NF_SOCKET_IPV6=m
CONFIG_NF_TPROXY_IPV6=m
CONFIG_NF_TABLES_IPV6=y
CONFIG_NFT_REJECT_IPV6=m
CONFIG_NFT_DUP_IPV6=m
CONFIG_NFT_FIB_IPV6=m
CONFIG_NF_DUP_IPV6=m
CONFIG_NF_REJECT_IPV6=m
CONFIG_NF_LOG_IPV6=m
CONFIG_IP6_NF_IPTABLES=m
CONFIG_IP6_NF_MATCH_AH=m
CONFIG_IP6_NF_MATCH_EUI64=m
CONFIG_IP6_NF_MATCH_FRAG=m
CONFIG_IP6_NF_MATCH_OPTS=m
CONFIG_IP6_NF_MATCH_HL=m
CONFIG_IP6_NF_MATCH_IPV6HEADER=m
CONFIG_IP6_NF_MATCH_MH=m
CONFIG_IP6_NF_MATCH_RPFILTER=m
CONFIG_IP6_NF_MATCH_RT=m
# CONFIG_IP6_NF_MATCH_SRH is not set
# CONFIG_IP6_NF_TARGET_HL is not set
CONFIG_IP6_NF_FILTER=m
CONFIG_IP6_NF_TARGET_REJECT=m
CONFIG_IP6_NF_TARGET_SYNPROXY=m
CONFIG_IP6_NF_MANGLE=m
CONFIG_IP6_NF_RAW=m
CONFIG_IP6_NF_SECURITY=m
CONFIG_IP6_NF_NAT=m
CONFIG_IP6_NF_TARGET_MASQUERADE=m
CONFIG_IP6_NF_TARGET_NPT=m
# end of IPv6: Netfilter Configuration

CONFIG_NF_DEFRAG_IPV6=m
CONFIG_NF_TABLES_BRIDGE=m
# CONFIG_NFT_BRIDGE_META is not set
CONFIG_NFT_BRIDGE_REJECT=m
# CONFIG_NF_CONNTRACK_BRIDGE is not set
CONFIG_BRIDGE_NF_EBTABLES=m
CONFIG_BRIDGE_EBT_BROUTE=m
CONFIG_BRIDGE_EBT_T_FILTER=m
CONFIG_BRIDGE_EBT_T_NAT=m
CONFIG_BRIDGE_EBT_802_3=m
CONFIG_BRIDGE_EBT_AMONG=m
CONFIG_BRIDGE_EBT_ARP=m
CONFIG_BRIDGE_EBT_IP=m
CONFIG_BRIDGE_EBT_IP6=m
CONFIG_BRIDGE_EBT_LIMIT=m
CONFIG_BRIDGE_EBT_MARK=m
CONFIG_BRIDGE_EBT_PKTTYPE=m
CONFIG_BRIDGE_EBT_STP=m
CONFIG_BRIDGE_EBT_VLAN=m
CONFIG_BRIDGE_EBT_ARPREPLY=m
CONFIG_BRIDGE_EBT_DNAT=m
CONFIG_BRIDGE_EBT_MARK_T=m
CONFIG_BRIDGE_EBT_REDIRECT=m
CONFIG_BRIDGE_EBT_SNAT=m
CONFIG_BRIDGE_EBT_LOG=m
CONFIG_BRIDGE_EBT_NFLOG=m
# CONFIG_BPFILTER is not set
# CONFIG_IP_DCCP is not set
CONFIG_IP_SCTP=m
# CONFIG_SCTP_DBG_OBJCNT is not set
# CONFIG_SCTP_DEFAULT_COOKIE_HMAC_MD5 is not set
CONFIG_SCTP_DEFAULT_COOKIE_HMAC_SHA1=y
# CONFIG_SCTP_DEFAULT_COOKIE_HMAC_NONE is not set
CONFIG_SCTP_COOKIE_HMAC_MD5=y
CONFIG_SCTP_COOKIE_HMAC_SHA1=y
CONFIG_INET_SCTP_DIAG=m
# CONFIG_RDS is not set
CONFIG_TIPC=m
# CONFIG_TIPC_MEDIA_IB is not set
CONFIG_TIPC_MEDIA_UDP=y
CONFIG_TIPC_CRYPTO=y
CONFIG_TIPC_DIAG=m
CONFIG_ATM=m
CONFIG_ATM_CLIP=m
# CONFIG_ATM_CLIP_NO_ICMP is not set
CONFIG_ATM_LANE=m
# CONFIG_ATM_MPOA is not set
CONFIG_ATM_BR2684=m
# CONFIG_ATM_BR2684_IPFILTER is not set
CONFIG_L2TP=m
CONFIG_L2TP_DEBUGFS=m
CONFIG_L2TP_V3=y
CONFIG_L2TP_IP=m
CONFIG_L2TP_ETH=m
CONFIG_STP=m
CONFIG_GARP=m
CONFIG_MRP=m
CONFIG_BRIDGE=m
CONFIG_BRIDGE_IGMP_SNOOPING=y
CONFIG_BRIDGE_VLAN_FILTERING=y
# CONFIG_BRIDGE_MRP is not set
# CONFIG_BRIDGE_CFM is not set
# CONFIG_NET_DSA is not set
CONFIG_VLAN_8021Q=m
CONFIG_VLAN_8021Q_GVRP=y
CONFIG_VLAN_8021Q_MVRP=y
# CONFIG_DECNET is not set
CONFIG_LLC=m
# CONFIG_LLC2 is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_PHONET is not set
CONFIG_6LOWPAN=m
# CONFIG_6LOWPAN_DEBUGFS is not set
# CONFIG_6LOWPAN_NHC is not set
CONFIG_IEEE802154=m
# CONFIG_IEEE802154_NL802154_EXPERIMENTAL is not set
CONFIG_IEEE802154_SOCKET=m
CONFIG_IEEE802154_6LOWPAN=m
CONFIG_MAC802154=m
CONFIG_NET_SCHED=y

#
# Queueing/Scheduling
#
CONFIG_NET_SCH_CBQ=m
CONFIG_NET_SCH_HTB=m
CONFIG_NET_SCH_HFSC=m
CONFIG_NET_SCH_ATM=m
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_MULTIQ=m
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFB=m
CONFIG_NET_SCH_SFQ=m
CONFIG_NET_SCH_TEQL=m
CONFIG_NET_SCH_TBF=m
# CONFIG_NET_SCH_CBS is not set
# CONFIG_NET_SCH_ETF is not set
# CONFIG_NET_SCH_TAPRIO is not set
CONFIG_NET_SCH_GRED=m
CONFIG_NET_SCH_DSMARK=m
CONFIG_NET_SCH_NETEM=m
CONFIG_NET_SCH_DRR=m
CONFIG_NET_SCH_MQPRIO=m
# CONFIG_NET_SCH_SKBPRIO is not set
CONFIG_NET_SCH_CHOKE=m
CONFIG_NET_SCH_QFQ=m
CONFIG_NET_SCH_CODEL=m
CONFIG_NET_SCH_FQ_CODEL=y
# CONFIG_NET_SCH_CAKE is not set
CONFIG_NET_SCH_FQ=m
CONFIG_NET_SCH_HHF=m
CONFIG_NET_SCH_PIE=m
# CONFIG_NET_SCH_FQ_PIE is not set
CONFIG_NET_SCH_INGRESS=m
CONFIG_NET_SCH_PLUG=m
# CONFIG_NET_SCH_ETS is not set
CONFIG_NET_SCH_DEFAULT=y
# CONFIG_DEFAULT_FQ is not set
# CONFIG_DEFAULT_CODEL is not set
CONFIG_DEFAULT_FQ_CODEL=y
# CONFIG_DEFAULT_SFQ is not set
# CONFIG_DEFAULT_PFIFO_FAST is not set
CONFIG_DEFAULT_NET_SCH="fq_codel"

#
# Classification
#
CONFIG_NET_CLS=y
CONFIG_NET_CLS_BASIC=m
CONFIG_NET_CLS_TCINDEX=m
CONFIG_NET_CLS_ROUTE4=m
CONFIG_NET_CLS_FW=m
CONFIG_NET_CLS_U32=m
CONFIG_CLS_U32_PERF=y
CONFIG_CLS_U32_MARK=y
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
CONFIG_NET_CLS_FLOW=m
CONFIG_NET_CLS_CGROUP=y
CONFIG_NET_CLS_BPF=m
CONFIG_NET_CLS_FLOWER=m
CONFIG_NET_CLS_MATCHALL=m
CONFIG_NET_EMATCH=y
CONFIG_NET_EMATCH_STACK=32
CONFIG_NET_EMATCH_CMP=m
CONFIG_NET_EMATCH_NBYTE=m
CONFIG_NET_EMATCH_U32=m
CONFIG_NET_EMATCH_META=m
CONFIG_NET_EMATCH_TEXT=m
# CONFIG_NET_EMATCH_CANID is not set
CONFIG_NET_EMATCH_IPSET=m
# CONFIG_NET_EMATCH_IPT is not set
CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=m
CONFIG_NET_ACT_GACT=m
CONFIG_GACT_PROB=y
CONFIG_NET_ACT_MIRRED=m
CONFIG_NET_ACT_SAMPLE=m
# CONFIG_NET_ACT_IPT is not set
CONFIG_NET_ACT_NAT=m
CONFIG_NET_ACT_PEDIT=m
CONFIG_NET_ACT_SIMP=m
CONFIG_NET_ACT_SKBEDIT=m
CONFIG_NET_ACT_CSUM=m
# CONFIG_NET_ACT_MPLS is not set
CONFIG_NET_ACT_VLAN=m
CONFIG_NET_ACT_BPF=m
# CONFIG_NET_ACT_CONNMARK is not set
# CONFIG_NET_ACT_CTINFO is not set
CONFIG_NET_ACT_SKBMOD=m
# CONFIG_NET_ACT_IFE is not set
CONFIG_NET_ACT_TUNNEL_KEY=m
# CONFIG_NET_ACT_GATE is not set
# CONFIG_NET_TC_SKB_EXT is not set
CONFIG_NET_SCH_FIFO=y
CONFIG_DCB=y
CONFIG_DNS_RESOLVER=m
# CONFIG_BATMAN_ADV is not set
CONFIG_OPENVSWITCH=m
CONFIG_OPENVSWITCH_GRE=m
CONFIG_VSOCKETS=m
CONFIG_VSOCKETS_DIAG=m
CONFIG_VSOCKETS_LOOPBACK=m
CONFIG_VMWARE_VMCI_VSOCKETS=m
CONFIG_VIRTIO_VSOCKETS=m
CONFIG_VIRTIO_VSOCKETS_COMMON=m
CONFIG_HYPERV_VSOCKETS=m
CONFIG_NETLINK_DIAG=m
CONFIG_MPLS=y
CONFIG_NET_MPLS_GSO=y
CONFIG_MPLS_ROUTING=m
CONFIG_MPLS_IPTUNNEL=m
CONFIG_NET_NSH=y
# CONFIG_HSR is not set
CONFIG_NET_SWITCHDEV=y
CONFIG_NET_L3_MASTER_DEV=y
# CONFIG_QRTR is not set
# CONFIG_NET_NCSI is not set
CONFIG_PCPU_DEV_REFCNT=y
CONFIG_RPS=y
CONFIG_RFS_ACCEL=y
CONFIG_SOCK_RX_QUEUE_MAPPING=y
CONFIG_XPS=y
CONFIG_CGROUP_NET_PRIO=y
CONFIG_CGROUP_NET_CLASSID=y
CONFIG_NET_RX_BUSY_POLL=y
CONFIG_BQL=y
CONFIG_BPF_STREAM_PARSER=y
CONFIG_NET_FLOW_LIMIT=y

#
# Network testing
#
CONFIG_NET_PKTGEN=m
CONFIG_NET_DROP_MONITOR=y
# end of Network testing
# end of Networking options

# CONFIG_HAMRADIO is not set
CONFIG_CAN=m
CONFIG_CAN_RAW=m
CONFIG_CAN_BCM=m
CONFIG_CAN_GW=m
# CONFIG_CAN_J1939 is not set
# CONFIG_CAN_ISOTP is not set

#
# CAN Device Drivers
#
CONFIG_CAN_VCAN=m
# CONFIG_CAN_VXCAN is not set
CONFIG_CAN_SLCAN=m
CONFIG_CAN_DEV=m
CONFIG_CAN_CALC_BITTIMING=y
# CONFIG_CAN_KVASER_PCIEFD is not set
CONFIG_CAN_C_CAN=m
CONFIG_CAN_C_CAN_PLATFORM=m
CONFIG_CAN_C_CAN_PCI=m
CONFIG_CAN_CC770=m
# CONFIG_CAN_CC770_ISA is not set
CONFIG_CAN_CC770_PLATFORM=m
# CONFIG_CAN_IFI_CANFD is not set
# CONFIG_CAN_M_CAN is not set
# CONFIG_CAN_PEAK_PCIEFD is not set
CONFIG_CAN_SJA1000=m
CONFIG_CAN_EMS_PCI=m
# CONFIG_CAN_F81601 is not set
CONFIG_CAN_KVASER_PCI=m
CONFIG_CAN_PEAK_PCI=m
CONFIG_CAN_PEAK_PCIEC=y
CONFIG_CAN_PLX_PCI=m
# CONFIG_CAN_SJA1000_ISA is not set
CONFIG_CAN_SJA1000_PLATFORM=m
CONFIG_CAN_SOFTING=m

#
# CAN SPI interfaces
#
# CONFIG_CAN_HI311X is not set
# CONFIG_CAN_MCP251X is not set
# CONFIG_CAN_MCP251XFD is not set
# end of CAN SPI interfaces

#
# CAN USB interfaces
#
# CONFIG_CAN_8DEV_USB is not set
# CONFIG_CAN_EMS_USB is not set
# CONFIG_CAN_ESD_USB2 is not set
# CONFIG_CAN_ETAS_ES58X is not set
# CONFIG_CAN_GS_USB is not set
# CONFIG_CAN_KVASER_USB is not set
# CONFIG_CAN_MCBA_USB is not set
# CONFIG_CAN_PEAK_USB is not set
# CONFIG_CAN_UCAN is not set
# end of CAN USB interfaces

# CONFIG_CAN_DEBUG_DEVICES is not set
# end of CAN Device Drivers

CONFIG_BT=m
CONFIG_BT_BREDR=y
CONFIG_BT_RFCOMM=m
CONFIG_BT_RFCOMM_TTY=y
CONFIG_BT_BNEP=m
CONFIG_BT_BNEP_MC_FILTER=y
CONFIG_BT_BNEP_PROTO_FILTER=y
CONFIG_BT_HIDP=m
CONFIG_BT_HS=y
CONFIG_BT_LE=y
# CONFIG_BT_6LOWPAN is not set
# CONFIG_BT_LEDS is not set
# CONFIG_BT_MSFTEXT is not set
# CONFIG_BT_AOSPEXT is not set
CONFIG_BT_DEBUGFS=y
# CONFIG_BT_SELFTEST is not set

#
# Bluetooth device drivers
#
# CONFIG_BT_HCIBTUSB is not set
# CONFIG_BT_HCIBTSDIO is not set
CONFIG_BT_HCIUART=m
CONFIG_BT_HCIUART_H4=y
CONFIG_BT_HCIUART_BCSP=y
CONFIG_BT_HCIUART_ATH3K=y
# CONFIG_BT_HCIUART_INTEL is not set
# CONFIG_BT_HCIUART_AG6XX is not set
# CONFIG_BT_HCIBCM203X is not set
# CONFIG_BT_HCIBPA10X is not set
# CONFIG_BT_HCIBFUSB is not set
CONFIG_BT_HCIVHCI=m
CONFIG_BT_MRVL=m
# CONFIG_BT_MRVL_SDIO is not set
# CONFIG_BT_MTKSDIO is not set
# CONFIG_BT_VIRTIO is not set
# end of Bluetooth device drivers

# CONFIG_AF_RXRPC is not set
# CONFIG_AF_KCM is not set
CONFIG_STREAM_PARSER=y
# CONFIG_MCTP is not set
CONFIG_FIB_RULES=y
CONFIG_WIRELESS=y
CONFIG_WEXT_CORE=y
CONFIG_WEXT_PROC=y
CONFIG_CFG80211=m
# CONFIG_NL80211_TESTMODE is not set
# CONFIG_CFG80211_DEVELOPER_WARNINGS is not set
CONFIG_CFG80211_REQUIRE_SIGNED_REGDB=y
CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS=y
CONFIG_CFG80211_DEFAULT_PS=y
# CONFIG_CFG80211_DEBUGFS is not set
CONFIG_CFG80211_CRDA_SUPPORT=y
CONFIG_CFG80211_WEXT=y
CONFIG_MAC80211=m
CONFIG_MAC80211_HAS_RC=y
CONFIG_MAC80211_RC_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT="minstrel_ht"
CONFIG_MAC80211_MESH=y
CONFIG_MAC80211_LEDS=y
CONFIG_MAC80211_DEBUGFS=y
# CONFIG_MAC80211_MESSAGE_TRACING is not set
# CONFIG_MAC80211_DEBUG_MENU is not set
CONFIG_MAC80211_STA_HASH_MAX_SIZE=0
CONFIG_RFKILL=m
CONFIG_RFKILL_LEDS=y
CONFIG_RFKILL_INPUT=y
# CONFIG_RFKILL_GPIO is not set
CONFIG_NET_9P=y
CONFIG_NET_9P_VIRTIO=y
# CONFIG_NET_9P_RDMA is not set
# CONFIG_NET_9P_DEBUG is not set
# CONFIG_CAIF is not set
CONFIG_CEPH_LIB=m
# CONFIG_CEPH_LIB_PRETTYDEBUG is not set
CONFIG_CEPH_LIB_USE_DNS_RESOLVER=y
# CONFIG_NFC is not set
CONFIG_PSAMPLE=m
# CONFIG_NET_IFE is not set
CONFIG_LWTUNNEL=y
CONFIG_LWTUNNEL_BPF=y
CONFIG_DST_CACHE=y
CONFIG_GRO_CELLS=y
CONFIG_SOCK_VALIDATE_XMIT=y
CONFIG_NET_SELFTESTS=y
CONFIG_NET_SOCK_MSG=y
CONFIG_NET_DEVLINK=y
CONFIG_FAILOVER=m
CONFIG_ETHTOOL_NETLINK=y

#
# Device Drivers
#
CONFIG_HAVE_EISA=y
# CONFIG_EISA is not set
CONFIG_HAVE_PCI=y
CONFIG_PCI=y
CONFIG_PCI_DOMAINS=y
CONFIG_PCIEPORTBUS=y
CONFIG_HOTPLUG_PCI_PCIE=y
CONFIG_PCIEAER=y
CONFIG_PCIEAER_INJECT=m
CONFIG_PCIE_ECRC=y
CONFIG_PCIEASPM=y
CONFIG_PCIEASPM_DEFAULT=y
# CONFIG_PCIEASPM_POWERSAVE is not set
# CONFIG_PCIEASPM_POWER_SUPERSAVE is not set
# CONFIG_PCIEASPM_PERFORMANCE is not set
CONFIG_PCIE_PME=y
CONFIG_PCIE_DPC=y
# CONFIG_PCIE_PTM is not set
# CONFIG_PCIE_EDR is not set
CONFIG_PCI_MSI=y
CONFIG_PCI_MSI_IRQ_DOMAIN=y
CONFIG_PCI_QUIRKS=y
# CONFIG_PCI_DEBUG is not set
# CONFIG_PCI_REALLOC_ENABLE_AUTO is not set
CONFIG_PCI_STUB=y
CONFIG_PCI_PF_STUB=m
CONFIG_PCI_ATS=y
CONFIG_PCI_LOCKLESS_CONFIG=y
CONFIG_PCI_IOV=y
CONFIG_PCI_PRI=y
CONFIG_PCI_PASID=y
# CONFIG_PCI_P2PDMA is not set
CONFIG_PCI_LABEL=y
CONFIG_PCI_HYPERV=m
CONFIG_HOTPLUG_PCI=y
CONFIG_HOTPLUG_PCI_ACPI=y
CONFIG_HOTPLUG_PCI_ACPI_IBM=m
# CONFIG_HOTPLUG_PCI_CPCI is not set
CONFIG_HOTPLUG_PCI_SHPC=y

#
# PCI controller drivers
#
CONFIG_VMD=y
CONFIG_PCI_HYPERV_INTERFACE=m

#
# DesignWare PCI Core Support
#
# CONFIG_PCIE_DW_PLAT_HOST is not set
# CONFIG_PCI_MESON is not set
# end of DesignWare PCI Core Support

#
# Mobiveil PCIe Core Support
#
# end of Mobiveil PCIe Core Support

#
# Cadence PCIe controllers support
#
# end of Cadence PCIe controllers support
# end of PCI controller drivers

#
# PCI Endpoint
#
# CONFIG_PCI_ENDPOINT is not set
# end of PCI Endpoint

#
# PCI switch controller drivers
#
# CONFIG_PCI_SW_SWITCHTEC is not set
# end of PCI switch controller drivers

# CONFIG_CXL_BUS is not set
# CONFIG_PCCARD is not set
# CONFIG_RAPIDIO is not set

#
# Generic Driver Options
#
CONFIG_AUXILIARY_BUS=y
# CONFIG_UEVENT_HELPER is not set
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y

#
# Firmware loader
#
CONFIG_FW_LOADER=y
CONFIG_FW_LOADER_PAGED_BUF=y
CONFIG_EXTRA_FIRMWARE=""
CONFIG_FW_LOADER_USER_HELPER=y
# CONFIG_FW_LOADER_USER_HELPER_FALLBACK is not set
# CONFIG_FW_LOADER_COMPRESS is not set
CONFIG_FW_CACHE=y
# end of Firmware loader

CONFIG_ALLOW_DEV_COREDUMP=y
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_DEBUG_TEST_DRIVER_REMOVE is not set
CONFIG_PM_QOS_KUNIT_TEST=y
# CONFIG_TEST_ASYNC_DRIVER_PROBE is not set
CONFIG_DRIVER_PE_KUNIT_TEST=y
CONFIG_GENERIC_CPU_AUTOPROBE=y
CONFIG_GENERIC_CPU_VULNERABILITIES=y
CONFIG_REGMAP=y
CONFIG_REGMAP_I2C=m
CONFIG_REGMAP_SPI=m
CONFIG_DMA_SHARED_BUFFER=y
# CONFIG_DMA_FENCE_TRACE is not set
# end of Generic Driver Options

#
# Bus devices
#
# CONFIG_MHI_BUS is not set
# end of Bus devices

CONFIG_CONNECTOR=y
CONFIG_PROC_EVENTS=y
# CONFIG_GNSS is not set
# CONFIG_MTD is not set
# CONFIG_OF is not set
CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
CONFIG_PARPORT=m
CONFIG_PARPORT_PC=m
CONFIG_PARPORT_SERIAL=m
# CONFIG_PARPORT_PC_FIFO is not set
# CONFIG_PARPORT_PC_SUPERIO is not set
# CONFIG_PARPORT_AX88796 is not set
CONFIG_PARPORT_1284=y
CONFIG_PNP=y
# CONFIG_PNP_DEBUG_MESSAGES is not set

#
# Protocols
#
CONFIG_PNPACPI=y
CONFIG_BLK_DEV=y
CONFIG_BLK_DEV_NULL_BLK=m
CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION=y
# CONFIG_BLK_DEV_FD is not set
CONFIG_CDROM=m
# CONFIG_PARIDE is not set
# CONFIG_BLK_DEV_PCIESSD_MTIP32XX is not set
# CONFIG_ZRAM is not set
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_LOOP_MIN_COUNT=0
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_DRBD is not set
CONFIG_BLK_DEV_NBD=m
# CONFIG_BLK_DEV_SX8 is not set
CONFIG_BLK_DEV_RAM=m
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=16384
CONFIG_CDROM_PKTCDVD=m
CONFIG_CDROM_PKTCDVD_BUFFERS=8
# CONFIG_CDROM_PKTCDVD_WCACHE is not set
# CONFIG_ATA_OVER_ETH is not set
CONFIG_VIRTIO_BLK=m
CONFIG_BLK_DEV_RBD=m
# CONFIG_BLK_DEV_RSXX is not set

#
# NVME Support
#
CONFIG_NVME_CORE=m
CONFIG_BLK_DEV_NVME=m
CONFIG_NVME_MULTIPATH=y
# CONFIG_NVME_HWMON is not set
CONFIG_NVME_FABRICS=m
# CONFIG_NVME_RDMA is not set
CONFIG_NVME_FC=m
# CONFIG_NVME_TCP is not set
CONFIG_NVME_TARGET=m
# CONFIG_NVME_TARGET_PASSTHRU is not set
CONFIG_NVME_TARGET_LOOP=m
# CONFIG_NVME_TARGET_RDMA is not set
CONFIG_NVME_TARGET_FC=m
CONFIG_NVME_TARGET_FCLOOP=m
# CONFIG_NVME_TARGET_TCP is not set
# end of NVME Support

#
# Misc devices
#
CONFIG_SENSORS_LIS3LV02D=m
# CONFIG_AD525X_DPOT is not set
# CONFIG_DUMMY_IRQ is not set
# CONFIG_IBM_ASM is not set
# CONFIG_PHANTOM is not set
CONFIG_TIFM_CORE=m
CONFIG_TIFM_7XX1=m
# CONFIG_ICS932S401 is not set
CONFIG_ENCLOSURE_SERVICES=m
CONFIG_SGI_XP=m
CONFIG_HP_ILO=m
CONFIG_SGI_GRU=m
# CONFIG_SGI_GRU_DEBUG is not set
CONFIG_APDS9802ALS=m
CONFIG_ISL29003=m
CONFIG_ISL29020=m
CONFIG_SENSORS_TSL2550=m
CONFIG_SENSORS_BH1770=m
CONFIG_SENSORS_APDS990X=m
# CONFIG_HMC6352 is not set
# CONFIG_DS1682 is not set
CONFIG_VMWARE_BALLOON=m
# CONFIG_LATTICE_ECP3_CONFIG is not set
# CONFIG_SRAM is not set
# CONFIG_DW_XDATA_PCIE is not set
# CONFIG_PCI_ENDPOINT_TEST is not set
# CONFIG_XILINX_SDFEC is not set
CONFIG_MISC_RTSX=m
# CONFIG_C2PORT is not set

#
# EEPROM support
#
# CONFIG_EEPROM_AT24 is not set
# CONFIG_EEPROM_AT25 is not set
CONFIG_EEPROM_LEGACY=m
CONFIG_EEPROM_MAX6875=m
CONFIG_EEPROM_93CX6=m
# CONFIG_EEPROM_93XX46 is not set
# CONFIG_EEPROM_IDT_89HPESX is not set
# CONFIG_EEPROM_EE1004 is not set
# end of EEPROM support

CONFIG_CB710_CORE=m
# CONFIG_CB710_DEBUG is not set
CONFIG_CB710_DEBUG_ASSUMPTIONS=y

#
# Texas Instruments shared transport line discipline
#
# CONFIG_TI_ST is not set
# end of Texas Instruments shared transport line discipline

CONFIG_SENSORS_LIS3_I2C=m
CONFIG_ALTERA_STAPL=m
CONFIG_INTEL_MEI=m
CONFIG_INTEL_MEI_ME=m
# CONFIG_INTEL_MEI_TXE is not set
# CONFIG_INTEL_MEI_HDCP is not set
CONFIG_VMWARE_VMCI=m
# CONFIG_GENWQE is not set
# CONFIG_ECHO is not set
# CONFIG_BCM_VK is not set
# CONFIG_MISC_ALCOR_PCI is not set
CONFIG_MISC_RTSX_PCI=m
# CONFIG_MISC_RTSX_USB is not set
# CONFIG_HABANA_AI is not set
# CONFIG_UACCE is not set
CONFIG_PVPANIC=y
# CONFIG_PVPANIC_MMIO is not set
# CONFIG_PVPANIC_PCI is not set
# end of Misc devices

#
# SCSI device support
#
CONFIG_SCSI_MOD=y
CONFIG_RAID_ATTRS=m
CONFIG_SCSI_COMMON=y
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
CONFIG_SCSI_NETLINK=y
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=m
CONFIG_CHR_DEV_ST=m
CONFIG_BLK_DEV_SR=m
CONFIG_CHR_DEV_SG=m
CONFIG_BLK_DEV_BSG=y
CONFIG_CHR_DEV_SCH=m
CONFIG_SCSI_ENCLOSURE=m
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y

#
# SCSI Transports
#
CONFIG_SCSI_SPI_ATTRS=m
CONFIG_SCSI_FC_ATTRS=m
CONFIG_SCSI_ISCSI_ATTRS=m
CONFIG_SCSI_SAS_ATTRS=m
CONFIG_SCSI_SAS_LIBSAS=m
CONFIG_SCSI_SAS_ATA=y
CONFIG_SCSI_SAS_HOST_SMP=y
CONFIG_SCSI_SRP_ATTRS=m
# end of SCSI Transports

CONFIG_SCSI_LOWLEVEL=y
# CONFIG_ISCSI_TCP is not set
# CONFIG_ISCSI_BOOT_SYSFS is not set
# CONFIG_SCSI_CXGB3_ISCSI is not set
# CONFIG_SCSI_CXGB4_ISCSI is not set
# CONFIG_SCSI_BNX2_ISCSI is not set
# CONFIG_BE2ISCSI is not set
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_HPSA is not set
# CONFIG_SCSI_3W_9XXX is not set
# CONFIG_SCSI_3W_SAS is not set
# CONFIG_SCSI_ACARD is not set
# CONFIG_SCSI_AACRAID is not set
# CONFIG_SCSI_AIC7XXX is not set
# CONFIG_SCSI_AIC79XX is not set
# CONFIG_SCSI_AIC94XX is not set
# CONFIG_SCSI_MVSAS is not set
# CONFIG_SCSI_MVUMI is not set
# CONFIG_SCSI_DPT_I2O is not set
# CONFIG_SCSI_ADVANSYS is not set
# CONFIG_SCSI_ARCMSR is not set
# CONFIG_SCSI_ESAS2R is not set
# CONFIG_MEGARAID_NEWGEN is not set
# CONFIG_MEGARAID_LEGACY is not set
# CONFIG_MEGARAID_SAS is not set
CONFIG_SCSI_MPT3SAS=m
CONFIG_SCSI_MPT2SAS_MAX_SGE=128
CONFIG_SCSI_MPT3SAS_MAX_SGE=128
# CONFIG_SCSI_MPT2SAS is not set
# CONFIG_SCSI_MPI3MR is not set
# CONFIG_SCSI_SMARTPQI is not set
# CONFIG_SCSI_UFSHCD is not set
# CONFIG_SCSI_HPTIOP is not set
# CONFIG_SCSI_BUSLOGIC is not set
# CONFIG_SCSI_MYRB is not set
# CONFIG_SCSI_MYRS is not set
# CONFIG_VMWARE_PVSCSI is not set
# CONFIG_HYPERV_STORAGE is not set
# CONFIG_LIBFC is not set
# CONFIG_SCSI_SNIC is not set
# CONFIG_SCSI_DMX3191D is not set
# CONFIG_SCSI_FDOMAIN_PCI is not set
CONFIG_SCSI_ISCI=m
# CONFIG_SCSI_IPS is not set
# CONFIG_SCSI_INITIO is not set
# CONFIG_SCSI_INIA100 is not set
# CONFIG_SCSI_PPA is not set
# CONFIG_SCSI_IMM is not set
# CONFIG_SCSI_STEX is not set
# CONFIG_SCSI_SYM53C8XX_2 is not set
# CONFIG_SCSI_IPR is not set
# CONFIG_SCSI_QLOGIC_1280 is not set
# CONFIG_SCSI_QLA_FC is not set
# CONFIG_SCSI_QLA_ISCSI is not set
# CONFIG_SCSI_LPFC is not set
# CONFIG_SCSI_EFCT is not set
# CONFIG_SCSI_DC395x is not set
# CONFIG_SCSI_AM53C974 is not set
# CONFIG_SCSI_WD719X is not set
CONFIG_SCSI_DEBUG=m
# CONFIG_SCSI_PMCRAID is not set
# CONFIG_SCSI_PM8001 is not set
# CONFIG_SCSI_BFA_FC is not set
# CONFIG_SCSI_VIRTIO is not set
# CONFIG_SCSI_CHELSIO_FCOE is not set
CONFIG_SCSI_DH=y
CONFIG_SCSI_DH_RDAC=y
CONFIG_SCSI_DH_HP_SW=y
CONFIG_SCSI_DH_EMC=y
CONFIG_SCSI_DH_ALUA=y
# end of SCSI device support

CONFIG_ATA=m
CONFIG_SATA_HOST=y
CONFIG_PATA_TIMINGS=y
CONFIG_ATA_VERBOSE_ERROR=y
CONFIG_ATA_FORCE=y
CONFIG_ATA_ACPI=y
# CONFIG_SATA_ZPODD is not set
CONFIG_SATA_PMP=y

#
# Controllers with non-SFF native interface
#
CONFIG_SATA_AHCI=m
CONFIG_SATA_MOBILE_LPM_POLICY=0
CONFIG_SATA_AHCI_PLATFORM=m
# CONFIG_SATA_INIC162X is not set
# CONFIG_SATA_ACARD_AHCI is not set
# CONFIG_SATA_SIL24 is not set
CONFIG_ATA_SFF=y

#
# SFF controllers with custom DMA interface
#
# CONFIG_PDC_ADMA is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_SX4 is not set
CONFIG_ATA_BMDMA=y

#
# SATA SFF controllers with BMDMA
#
CONFIG_ATA_PIIX=m
# CONFIG_SATA_DWC is not set
# CONFIG_SATA_MV is not set
# CONFIG_SATA_NV is not set
# CONFIG_SATA_PROMISE is not set
# CONFIG_SATA_SIL is not set
# CONFIG_SATA_SIS is not set
# CONFIG_SATA_SVW is not set
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
# CONFIG_SATA_VITESSE is not set

#
# PATA SFF controllers with BMDMA
#
# CONFIG_PATA_ALI is not set
# CONFIG_PATA_AMD is not set
# CONFIG_PATA_ARTOP is not set
# CONFIG_PATA_ATIIXP is not set
# CONFIG_PATA_ATP867X is not set
# CONFIG_PATA_CMD64X is not set
# CONFIG_PATA_CYPRESS is not set
# CONFIG_PATA_EFAR is not set
# CONFIG_PATA_HPT366 is not set
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
# CONFIG_PATA_HPT3X3 is not set
# CONFIG_PATA_IT8213 is not set
# CONFIG_PATA_IT821X is not set
# CONFIG_PATA_JMICRON is not set
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NINJA32 is not set
# CONFIG_PATA_NS87415 is not set
# CONFIG_PATA_OLDPIIX is not set
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC2027X is not set
# CONFIG_PATA_PDC_OLD is not set
# CONFIG_PATA_RADISYS is not set
# CONFIG_PATA_RDC is not set
# CONFIG_PATA_SCH is not set
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_SIL680 is not set
# CONFIG_PATA_SIS is not set
# CONFIG_PATA_TOSHIBA is not set
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_VIA is not set
# CONFIG_PATA_WINBOND is not set

#
# PIO-only SFF controllers
#
# CONFIG_PATA_CMD640_PCI is not set
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_RZ1000 is not set

#
# Generic fallback / legacy drivers
#
# CONFIG_PATA_ACPI is not set
CONFIG_ATA_GENERIC=m
# CONFIG_PATA_LEGACY is not set
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_AUTODETECT=y
CONFIG_MD_LINEAR=m
CONFIG_MD_RAID0=m
CONFIG_MD_RAID1=m
CONFIG_MD_RAID10=m
CONFIG_MD_RAID456=m
CONFIG_MD_MULTIPATH=m
CONFIG_MD_FAULTY=m
CONFIG_MD_CLUSTER=m
# CONFIG_BCACHE is not set
CONFIG_BLK_DEV_DM_BUILTIN=y
CONFIG_BLK_DEV_DM=m
CONFIG_DM_DEBUG=y
CONFIG_DM_BUFIO=m
# CONFIG_DM_DEBUG_BLOCK_MANAGER_LOCKING is not set
CONFIG_DM_BIO_PRISON=m
CONFIG_DM_PERSISTENT_DATA=m
# CONFIG_DM_UNSTRIPED is not set
CONFIG_DM_CRYPT=m
CONFIG_DM_SNAPSHOT=m
CONFIG_DM_THIN_PROVISIONING=m
CONFIG_DM_CACHE=m
CONFIG_DM_CACHE_SMQ=m
CONFIG_DM_WRITECACHE=m
# CONFIG_DM_EBS is not set
CONFIG_DM_ERA=m
# CONFIG_DM_CLONE is not set
CONFIG_DM_MIRROR=m
CONFIG_DM_LOG_USERSPACE=m
CONFIG_DM_RAID=m
CONFIG_DM_ZERO=m
CONFIG_DM_MULTIPATH=m
CONFIG_DM_MULTIPATH_QL=m
CONFIG_DM_MULTIPATH_ST=m
# CONFIG_DM_MULTIPATH_HST is not set
# CONFIG_DM_MULTIPATH_IOA is not set
CONFIG_DM_DELAY=m
# CONFIG_DM_DUST is not set
CONFIG_DM_UEVENT=y
CONFIG_DM_FLAKEY=m
CONFIG_DM_VERITY=m
# CONFIG_DM_VERITY_VERIFY_ROOTHASH_SIG is not set
# CONFIG_DM_VERITY_FEC is not set
CONFIG_DM_SWITCH=m
CONFIG_DM_LOG_WRITES=m
CONFIG_DM_INTEGRITY=m
# CONFIG_DM_ZONED is not set
CONFIG_TARGET_CORE=m
CONFIG_TCM_IBLOCK=m
CONFIG_TCM_FILEIO=m
CONFIG_TCM_PSCSI=m
CONFIG_TCM_USER2=m
CONFIG_LOOPBACK_TARGET=m
CONFIG_ISCSI_TARGET=m
# CONFIG_SBP_TARGET is not set
# CONFIG_FUSION is not set

#
# IEEE 1394 (FireWire) support
#
CONFIG_FIREWIRE=m
CONFIG_FIREWIRE_OHCI=m
CONFIG_FIREWIRE_SBP2=m
CONFIG_FIREWIRE_NET=m
# CONFIG_FIREWIRE_NOSY is not set
# end of IEEE 1394 (FireWire) support

CONFIG_MACINTOSH_DRIVERS=y
CONFIG_MAC_EMUMOUSEBTN=y
CONFIG_NETDEVICES=y
CONFIG_MII=y
CONFIG_NET_CORE=y
# CONFIG_BONDING is not set
# CONFIG_DUMMY is not set
# CONFIG_WIREGUARD is not set
# CONFIG_EQUALIZER is not set
# CONFIG_NET_FC is not set
# CONFIG_IFB is not set
# CONFIG_NET_TEAM is not set
# CONFIG_MACVLAN is not set
# CONFIG_IPVLAN is not set
# CONFIG_VXLAN is not set
# CONFIG_GENEVE is not set
# CONFIG_BAREUDP is not set
# CONFIG_GTP is not set
# CONFIG_MACSEC is not set
CONFIG_NETCONSOLE=m
CONFIG_NETCONSOLE_DYNAMIC=y
CONFIG_NETPOLL=y
CONFIG_NET_POLL_CONTROLLER=y
CONFIG_TUN=m
# CONFIG_TUN_VNET_CROSS_LE is not set
CONFIG_VETH=m
CONFIG_VIRTIO_NET=m
# CONFIG_NLMON is not set
# CONFIG_NET_VRF is not set
# CONFIG_VSOCKMON is not set
# CONFIG_ARCNET is not set
CONFIG_ATM_DRIVERS=y
# CONFIG_ATM_DUMMY is not set
# CONFIG_ATM_TCP is not set
# CONFIG_ATM_LANAI is not set
# CONFIG_ATM_ENI is not set
# CONFIG_ATM_FIRESTREAM is not set
# CONFIG_ATM_ZATM is not set
# CONFIG_ATM_NICSTAR is not set
# CONFIG_ATM_IDT77252 is not set
# CONFIG_ATM_AMBASSADOR is not set
# CONFIG_ATM_HORIZON is not set
# CONFIG_ATM_IA is not set
# CONFIG_ATM_FORE200E is not set
# CONFIG_ATM_HE is not set
# CONFIG_ATM_SOLOS is not set
CONFIG_ETHERNET=y
CONFIG_MDIO=y
# CONFIG_NET_VENDOR_3COM is not set
CONFIG_NET_VENDOR_ADAPTEC=y
# CONFIG_ADAPTEC_STARFIRE is not set
CONFIG_NET_VENDOR_AGERE=y
# CONFIG_ET131X is not set
CONFIG_NET_VENDOR_ALACRITECH=y
# CONFIG_SLICOSS is not set
CONFIG_NET_VENDOR_ALTEON=y
# CONFIG_ACENIC is not set
# CONFIG_ALTERA_TSE is not set
CONFIG_NET_VENDOR_AMAZON=y
# CONFIG_ENA_ETHERNET is not set
CONFIG_NET_VENDOR_AMD=y
# CONFIG_AMD8111_ETH is not set
# CONFIG_PCNET32 is not set
# CONFIG_AMD_XGBE is not set
CONFIG_NET_VENDOR_AQUANTIA=y
# CONFIG_AQTION is not set
CONFIG_NET_VENDOR_ARC=y
CONFIG_NET_VENDOR_ATHEROS=y
# CONFIG_ATL2 is not set
# CONFIG_ATL1 is not set
# CONFIG_ATL1E is not set
# CONFIG_ATL1C is not set
# CONFIG_ALX is not set
CONFIG_NET_VENDOR_BROADCOM=y
# CONFIG_B44 is not set
# CONFIG_BCMGENET is not set
# CONFIG_BNX2 is not set
# CONFIG_CNIC is not set
# CONFIG_TIGON3 is not set
# CONFIG_BNX2X is not set
# CONFIG_SYSTEMPORT is not set
# CONFIG_BNXT is not set
CONFIG_NET_VENDOR_BROCADE=y
# CONFIG_BNA is not set
CONFIG_NET_VENDOR_CADENCE=y
# CONFIG_MACB is not set
CONFIG_NET_VENDOR_CAVIUM=y
# CONFIG_THUNDER_NIC_PF is not set
# CONFIG_THUNDER_NIC_VF is not set
# CONFIG_THUNDER_NIC_BGX is not set
# CONFIG_THUNDER_NIC_RGX is not set
CONFIG_CAVIUM_PTP=y
# CONFIG_LIQUIDIO is not set
# CONFIG_LIQUIDIO_VF is not set
CONFIG_NET_VENDOR_CHELSIO=y
# CONFIG_CHELSIO_T1 is not set
# CONFIG_CHELSIO_T3 is not set
# CONFIG_CHELSIO_T4 is not set
# CONFIG_CHELSIO_T4VF is not set
CONFIG_NET_VENDOR_CISCO=y
# CONFIG_ENIC is not set
CONFIG_NET_VENDOR_CORTINA=y
# CONFIG_CX_ECAT is not set
# CONFIG_DNET is not set
CONFIG_NET_VENDOR_DEC=y
# CONFIG_NET_TULIP is not set
CONFIG_NET_VENDOR_DLINK=y
# CONFIG_DL2K is not set
# CONFIG_SUNDANCE is not set
CONFIG_NET_VENDOR_EMULEX=y
# CONFIG_BE2NET is not set
CONFIG_NET_VENDOR_EZCHIP=y
CONFIG_NET_VENDOR_GOOGLE=y
# CONFIG_GVE is not set
CONFIG_NET_VENDOR_HUAWEI=y
# CONFIG_HINIC is not set
CONFIG_NET_VENDOR_I825XX=y
CONFIG_NET_VENDOR_INTEL=y
# CONFIG_E100 is not set
CONFIG_E1000=y
CONFIG_E1000E=y
CONFIG_E1000E_HWTS=y
CONFIG_IGB=y
CONFIG_IGB_HWMON=y
# CONFIG_IGBVF is not set
# CONFIG_IXGB is not set
CONFIG_IXGBE=y
CONFIG_IXGBE_HWMON=y
# CONFIG_IXGBE_DCB is not set
CONFIG_IXGBE_IPSEC=y
# CONFIG_IXGBEVF is not set
CONFIG_I40E=y
# CONFIG_I40E_DCB is not set
# CONFIG_I40EVF is not set
# CONFIG_ICE is not set
# CONFIG_FM10K is not set
CONFIG_IGC=y
CONFIG_NET_VENDOR_MICROSOFT=y
# CONFIG_MICROSOFT_MANA is not set
# CONFIG_JME is not set
CONFIG_NET_VENDOR_LITEX=y
CONFIG_NET_VENDOR_MARVELL=y
# CONFIG_MVMDIO is not set
# CONFIG_SKGE is not set
# CONFIG_SKY2 is not set
# CONFIG_PRESTERA is not set
CONFIG_NET_VENDOR_MELLANOX=y
# CONFIG_MLX4_EN is not set
# CONFIG_MLX5_CORE is not set
# CONFIG_MLXSW_CORE is not set
# CONFIG_MLXFW is not set
CONFIG_NET_VENDOR_MICREL=y
# CONFIG_KS8842 is not set
# CONFIG_KS8851 is not set
# CONFIG_KS8851_MLL is not set
# CONFIG_KSZ884X_PCI is not set
CONFIG_NET_VENDOR_MICROCHIP=y
# CONFIG_ENC28J60 is not set
# CONFIG_ENCX24J600 is not set
# CONFIG_LAN743X is not set
CONFIG_NET_VENDOR_MICROSEMI=y
CONFIG_NET_VENDOR_MYRI=y
# CONFIG_MYRI10GE is not set
# CONFIG_FEALNX is not set
CONFIG_NET_VENDOR_NATSEMI=y
# CONFIG_NATSEMI is not set
# CONFIG_NS83820 is not set
CONFIG_NET_VENDOR_NETERION=y
# CONFIG_S2IO is not set
# CONFIG_VXGE is not set
CONFIG_NET_VENDOR_NETRONOME=y
# CONFIG_NFP is not set
CONFIG_NET_VENDOR_NI=y
# CONFIG_NI_XGE_MANAGEMENT_ENET is not set
CONFIG_NET_VENDOR_8390=y
# CONFIG_NE2K_PCI is not set
CONFIG_NET_VENDOR_NVIDIA=y
# CONFIG_FORCEDETH is not set
CONFIG_NET_VENDOR_OKI=y
# CONFIG_ETHOC is not set
CONFIG_NET_VENDOR_PACKET_ENGINES=y
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
CONFIG_NET_VENDOR_PENSANDO=y
# CONFIG_IONIC is not set
CONFIG_NET_VENDOR_QLOGIC=y
# CONFIG_QLA3XXX is not set
# CONFIG_QLCNIC is not set
# CONFIG_NETXEN_NIC is not set
# CONFIG_QED is not set
CONFIG_NET_VENDOR_QUALCOMM=y
# CONFIG_QCOM_EMAC is not set
# CONFIG_RMNET is not set
CONFIG_NET_VENDOR_RDC=y
# CONFIG_R6040 is not set
CONFIG_NET_VENDOR_REALTEK=y
# CONFIG_ATP is not set
# CONFIG_8139CP is not set
# CONFIG_8139TOO is not set
CONFIG_R8169=y
CONFIG_NET_VENDOR_RENESAS=y
CONFIG_NET_VENDOR_ROCKER=y
# CONFIG_ROCKER is not set
CONFIG_NET_VENDOR_SAMSUNG=y
# CONFIG_SXGBE_ETH is not set
CONFIG_NET_VENDOR_SEEQ=y
CONFIG_NET_VENDOR_SOLARFLARE=y
# CONFIG_SFC is not set
# CONFIG_SFC_FALCON is not set
CONFIG_NET_VENDOR_SILAN=y
# CONFIG_SC92031 is not set
CONFIG_NET_VENDOR_SIS=y
# CONFIG_SIS900 is not set
# CONFIG_SIS190 is not set
CONFIG_NET_VENDOR_SMSC=y
# CONFIG_EPIC100 is not set
# CONFIG_SMSC911X is not set
# CONFIG_SMSC9420 is not set
CONFIG_NET_VENDOR_SOCIONEXT=y
CONFIG_NET_VENDOR_STMICRO=y
# CONFIG_STMMAC_ETH is not set
CONFIG_NET_VENDOR_SUN=y
# CONFIG_HAPPYMEAL is not set
# CONFIG_SUNGEM is not set
# CONFIG_CASSINI is not set
# CONFIG_NIU is not set
CONFIG_NET_VENDOR_SYNOPSYS=y
# CONFIG_DWC_XLGMAC is not set
CONFIG_NET_VENDOR_TEHUTI=y
# CONFIG_TEHUTI is not set
CONFIG_NET_VENDOR_TI=y
# CONFIG_TI_CPSW_PHY_SEL is not set
# CONFIG_TLAN is not set
CONFIG_NET_VENDOR_VIA=y
# CONFIG_VIA_RHINE is not set
# CONFIG_VIA_VELOCITY is not set
CONFIG_NET_VENDOR_WIZNET=y
# CONFIG_WIZNET_W5100 is not set
# CONFIG_WIZNET_W5300 is not set
CONFIG_NET_VENDOR_XILINX=y
# CONFIG_XILINX_EMACLITE is not set
# CONFIG_XILINX_AXI_EMAC is not set
# CONFIG_XILINX_LL_TEMAC is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_NET_SB1000 is not set
CONFIG_PHYLIB=y
CONFIG_SWPHY=y
# CONFIG_LED_TRIGGER_PHY is not set
CONFIG_FIXED_PHY=y

#
# MII PHY device drivers
#
# CONFIG_AMD_PHY is not set
# CONFIG_ADIN_PHY is not set
# CONFIG_AQUANTIA_PHY is not set
CONFIG_AX88796B_PHY=y
# CONFIG_BROADCOM_PHY is not set
# CONFIG_BCM54140_PHY is not set
# CONFIG_BCM7XXX_PHY is not set
# CONFIG_BCM84881_PHY is not set
# CONFIG_BCM87XX_PHY is not set
# CONFIG_CICADA_PHY is not set
# CONFIG_CORTINA_PHY is not set
# CONFIG_DAVICOM_PHY is not set
# CONFIG_ICPLUS_PHY is not set
# CONFIG_LXT_PHY is not set
# CONFIG_INTEL_XWAY_PHY is not set
# CONFIG_LSI_ET1011C_PHY is not set
# CONFIG_MARVELL_PHY is not set
# CONFIG_MARVELL_10G_PHY is not set
# CONFIG_MARVELL_88X2222_PHY is not set
# CONFIG_MAXLINEAR_GPHY is not set
# CONFIG_MEDIATEK_GE_PHY is not set
# CONFIG_MICREL_PHY is not set
# CONFIG_MICROCHIP_PHY is not set
# CONFIG_MICROCHIP_T1_PHY is not set
# CONFIG_MICROSEMI_PHY is not set
# CONFIG_MOTORCOMM_PHY is not set
# CONFIG_NATIONAL_PHY is not set
# CONFIG_NXP_C45_TJA11XX_PHY is not set
# CONFIG_NXP_TJA11XX_PHY is not set
# CONFIG_QSEMI_PHY is not set
CONFIG_REALTEK_PHY=y
# CONFIG_RENESAS_PHY is not set
# CONFIG_ROCKCHIP_PHY is not set
# CONFIG_SMSC_PHY is not set
# CONFIG_STE10XP is not set
# CONFIG_TERANETICS_PHY is not set
# CONFIG_DP83822_PHY is not set
# CONFIG_DP83TC811_PHY is not set
# CONFIG_DP83848_PHY is not set
# CONFIG_DP83867_PHY is not set
# CONFIG_DP83869_PHY is not set
# CONFIG_VITESSE_PHY is not set
# CONFIG_XILINX_GMII2RGMII is not set
# CONFIG_MICREL_KS8995MA is not set
CONFIG_MDIO_DEVICE=y
CONFIG_MDIO_BUS=y
CONFIG_FWNODE_MDIO=y
CONFIG_ACPI_MDIO=y
CONFIG_MDIO_DEVRES=y
# CONFIG_MDIO_BITBANG is not set
# CONFIG_MDIO_BCM_UNIMAC is not set
# CONFIG_MDIO_MVUSB is not set
# CONFIG_MDIO_MSCC_MIIM is not set
# CONFIG_MDIO_THUNDER is not set

#
# MDIO Multiplexers
#

#
# PCS device drivers
#
# CONFIG_PCS_XPCS is not set
# end of PCS device drivers

# CONFIG_PLIP is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
CONFIG_USB_NET_DRIVERS=y
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
CONFIG_USB_RTL8152=y
# CONFIG_USB_LAN78XX is not set
CONFIG_USB_USBNET=y
CONFIG_USB_NET_AX8817X=y
CONFIG_USB_NET_AX88179_178A=y
# CONFIG_USB_NET_CDCETHER is not set
# CONFIG_USB_NET_CDC_EEM is not set
# CONFIG_USB_NET_CDC_NCM is not set
# CONFIG_USB_NET_HUAWEI_CDC_NCM is not set
# CONFIG_USB_NET_CDC_MBIM is not set
# CONFIG_USB_NET_DM9601 is not set
# CONFIG_USB_NET_SR9700 is not set
# CONFIG_USB_NET_SR9800 is not set
# CONFIG_USB_NET_SMSC75XX is not set
# CONFIG_USB_NET_SMSC95XX is not set
# CONFIG_USB_NET_GL620A is not set
# CONFIG_USB_NET_NET1080 is not set
# CONFIG_USB_NET_PLUSB is not set
# CONFIG_USB_NET_MCS7830 is not set
# CONFIG_USB_NET_RNDIS_HOST is not set
# CONFIG_USB_NET_CDC_SUBSET is not set
# CONFIG_USB_NET_ZAURUS is not set
# CONFIG_USB_NET_CX82310_ETH is not set
# CONFIG_USB_NET_KALMIA is not set
# CONFIG_USB_NET_QMI_WWAN is not set
# CONFIG_USB_HSO is not set
# CONFIG_USB_NET_INT51X1 is not set
# CONFIG_USB_IPHETH is not set
# CONFIG_USB_SIERRA_NET is not set
# CONFIG_USB_NET_CH9200 is not set
# CONFIG_USB_NET_AQC111 is not set
CONFIG_WLAN=y
CONFIG_WLAN_VENDOR_ADMTEK=y
# CONFIG_ADM8211 is not set
CONFIG_WLAN_VENDOR_ATH=y
# CONFIG_ATH_DEBUG is not set
# CONFIG_ATH5K is not set
# CONFIG_ATH5K_PCI is not set
# CONFIG_ATH9K is not set
# CONFIG_ATH9K_HTC is not set
# CONFIG_CARL9170 is not set
# CONFIG_ATH6KL is not set
# CONFIG_AR5523 is not set
# CONFIG_WIL6210 is not set
# CONFIG_ATH10K is not set
# CONFIG_WCN36XX is not set
# CONFIG_ATH11K is not set
CONFIG_WLAN_VENDOR_ATMEL=y
# CONFIG_ATMEL is not set
# CONFIG_AT76C50X_USB is not set
CONFIG_WLAN_VENDOR_BROADCOM=y
# CONFIG_B43 is not set
# CONFIG_B43LEGACY is not set
# CONFIG_BRCMSMAC is not set
# CONFIG_BRCMFMAC is not set
CONFIG_WLAN_VENDOR_CISCO=y
# CONFIG_AIRO is not set
CONFIG_WLAN_VENDOR_INTEL=y
# CONFIG_IPW2100 is not set
# CONFIG_IPW2200 is not set
# CONFIG_IWL4965 is not set
# CONFIG_IWL3945 is not set
# CONFIG_IWLWIFI is not set
CONFIG_WLAN_VENDOR_INTERSIL=y
# CONFIG_HOSTAP is not set
# CONFIG_HERMES is not set
# CONFIG_P54_COMMON is not set
CONFIG_WLAN_VENDOR_MARVELL=y
# CONFIG_LIBERTAS is not set
# CONFIG_LIBERTAS_THINFIRM is not set
# CONFIG_MWIFIEX is not set
# CONFIG_MWL8K is not set
# CONFIG_WLAN_VENDOR_MEDIATEK is not set
CONFIG_WLAN_VENDOR_MICROCHIP=y
# CONFIG_WILC1000_SDIO is not set
# CONFIG_WILC1000_SPI is not set
CONFIG_WLAN_VENDOR_RALINK=y
# CONFIG_RT2X00 is not set
CONFIG_WLAN_VENDOR_REALTEK=y
# CONFIG_RTL8180 is not set
# CONFIG_RTL8187 is not set
CONFIG_RTL_CARDS=m
# CONFIG_RTL8192CE is not set
# CONFIG_RTL8192SE is not set
# CONFIG_RTL8192DE is not set
# CONFIG_RTL8723AE is not set
# CONFIG_RTL8723BE is not set
# CONFIG_RTL8188EE is not set
# CONFIG_RTL8192EE is not set
# CONFIG_RTL8821AE is not set
# CONFIG_RTL8192CU is not set
# CONFIG_RTL8XXXU is not set
# CONFIG_RTW88 is not set
CONFIG_WLAN_VENDOR_RSI=y
# CONFIG_RSI_91X is not set
CONFIG_WLAN_VENDOR_ST=y
# CONFIG_CW1200 is not set
CONFIG_WLAN_VENDOR_TI=y
# CONFIG_WL1251 is not set
# CONFIG_WL12XX is not set
# CONFIG_WL18XX is not set
# CONFIG_WLCORE is not set
CONFIG_WLAN_VENDOR_ZYDAS=y
# CONFIG_USB_ZD1201 is not set
# CONFIG_ZD1211RW is not set
CONFIG_WLAN_VENDOR_QUANTENNA=y
# CONFIG_QTNFMAC_PCIE is not set
CONFIG_MAC80211_HWSIM=m
# CONFIG_USB_NET_RNDIS_WLAN is not set
# CONFIG_VIRT_WIFI is not set
# CONFIG_WAN is not set
CONFIG_IEEE802154_DRIVERS=m
# CONFIG_IEEE802154_FAKELB is not set
# CONFIG_IEEE802154_AT86RF230 is not set
# CONFIG_IEEE802154_MRF24J40 is not set
# CONFIG_IEEE802154_CC2520 is not set
# CONFIG_IEEE802154_ATUSB is not set
# CONFIG_IEEE802154_ADF7242 is not set
# CONFIG_IEEE802154_CA8210 is not set
# CONFIG_IEEE802154_MCR20A is not set
# CONFIG_IEEE802154_HWSIM is not set

#
# Wireless WAN
#
# CONFIG_WWAN is not set
# end of Wireless WAN

# CONFIG_VMXNET3 is not set
# CONFIG_FUJITSU_ES is not set
# CONFIG_HYPERV_NET is not set
CONFIG_NETDEVSIM=m
CONFIG_NET_FAILOVER=m
# CONFIG_ISDN is not set

#
# Input device support
#
CONFIG_INPUT=y
CONFIG_INPUT_LEDS=y
CONFIG_INPUT_FF_MEMLESS=m
CONFIG_INPUT_SPARSEKMAP=m
# CONFIG_INPUT_MATRIXKMAP is not set

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
CONFIG_INPUT_JOYDEV=m
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ADP5588 is not set
# CONFIG_KEYBOARD_ADP5589 is not set
# CONFIG_KEYBOARD_APPLESPI is not set
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_QT1050 is not set
# CONFIG_KEYBOARD_QT1070 is not set
# CONFIG_KEYBOARD_QT2160 is not set
# CONFIG_KEYBOARD_DLINK_DIR685 is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_GPIO is not set
# CONFIG_KEYBOARD_GPIO_POLLED is not set
# CONFIG_KEYBOARD_TCA6416 is not set
# CONFIG_KEYBOARD_TCA8418 is not set
# CONFIG_KEYBOARD_MATRIX is not set
# CONFIG_KEYBOARD_LM8323 is not set
# CONFIG_KEYBOARD_LM8333 is not set
# CONFIG_KEYBOARD_MAX7359 is not set
# CONFIG_KEYBOARD_MCS is not set
# CONFIG_KEYBOARD_MPR121 is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_OPENCORES is not set
# CONFIG_KEYBOARD_SAMSUNG is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_TM2_TOUCHKEY is not set
# CONFIG_KEYBOARD_XTKBD is not set
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y
CONFIG_MOUSE_PS2_ALPS=y
CONFIG_MOUSE_PS2_BYD=y
CONFIG_MOUSE_PS2_LOGIPS2PP=y
CONFIG_MOUSE_PS2_SYNAPTICS=y
CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS=y
CONFIG_MOUSE_PS2_CYPRESS=y
CONFIG_MOUSE_PS2_LIFEBOOK=y
CONFIG_MOUSE_PS2_TRACKPOINT=y
CONFIG_MOUSE_PS2_ELANTECH=y
CONFIG_MOUSE_PS2_ELANTECH_SMBUS=y
CONFIG_MOUSE_PS2_SENTELIC=y
# CONFIG_MOUSE_PS2_TOUCHKIT is not set
CONFIG_MOUSE_PS2_FOCALTECH=y
CONFIG_MOUSE_PS2_VMMOUSE=y
CONFIG_MOUSE_PS2_SMBUS=y
CONFIG_MOUSE_SERIAL=m
# CONFIG_MOUSE_APPLETOUCH is not set
# CONFIG_MOUSE_BCM5974 is not set
CONFIG_MOUSE_CYAPA=m
CONFIG_MOUSE_ELAN_I2C=m
CONFIG_MOUSE_ELAN_I2C_I2C=y
CONFIG_MOUSE_ELAN_I2C_SMBUS=y
CONFIG_MOUSE_VSXXXAA=m
# CONFIG_MOUSE_GPIO is not set
CONFIG_MOUSE_SYNAPTICS_I2C=m
# CONFIG_MOUSE_SYNAPTICS_USB is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set
CONFIG_RMI4_CORE=m
CONFIG_RMI4_I2C=m
CONFIG_RMI4_SPI=m
CONFIG_RMI4_SMB=m
CONFIG_RMI4_F03=y
CONFIG_RMI4_F03_SERIO=m
CONFIG_RMI4_2D_SENSOR=y
CONFIG_RMI4_F11=y
CONFIG_RMI4_F12=y
CONFIG_RMI4_F30=y
CONFIG_RMI4_F34=y
# CONFIG_RMI4_F3A is not set
# CONFIG_RMI4_F54 is not set
CONFIG_RMI4_F55=y

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_ARCH_MIGHT_HAVE_PC_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=y
# CONFIG_SERIO_CT82C710 is not set
# CONFIG_SERIO_PARKBD is not set
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
CONFIG_SERIO_RAW=m
CONFIG_SERIO_ALTERA_PS2=m
# CONFIG_SERIO_PS2MULT is not set
CONFIG_SERIO_ARC_PS2=m
CONFIG_HYPERV_KEYBOARD=m
# CONFIG_SERIO_GPIO_PS2 is not set
# CONFIG_USERIO is not set
# CONFIG_GAMEPORT is not set
# end of Hardware I/O ports
# end of Input device support

#
# Character devices
#
CONFIG_TTY=y
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_VT_CONSOLE_SLEEP=y
CONFIG_HW_CONSOLE=y
CONFIG_VT_HW_CONSOLE_BINDING=y
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set
CONFIG_LDISC_AUTOLOAD=y

#
# Serial drivers
#
CONFIG_SERIAL_EARLYCON=y
CONFIG_SERIAL_8250=y
# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
CONFIG_SERIAL_8250_PNP=y
# CONFIG_SERIAL_8250_16550A_VARIANTS is not set
# CONFIG_SERIAL_8250_FINTEK is not set
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_DMA=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_EXAR=y
CONFIG_SERIAL_8250_NR_UARTS=64
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
CONFIG_SERIAL_8250_EXTENDED=y
CONFIG_SERIAL_8250_MANY_PORTS=y
CONFIG_SERIAL_8250_SHARE_IRQ=y
# CONFIG_SERIAL_8250_DETECT_IRQ is not set
CONFIG_SERIAL_8250_RSA=y
CONFIG_SERIAL_8250_DWLIB=y
CONFIG_SERIAL_8250_DW=y
# CONFIG_SERIAL_8250_RT288X is not set
CONFIG_SERIAL_8250_LPSS=y
CONFIG_SERIAL_8250_MID=y

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_MAX3100 is not set
# CONFIG_SERIAL_MAX310X is not set
# CONFIG_SERIAL_UARTLITE is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
CONFIG_SERIAL_JSM=m
# CONFIG_SERIAL_LANTIQ is not set
# CONFIG_SERIAL_SCCNXP is not set
# CONFIG_SERIAL_SC16IS7XX is not set
# CONFIG_SERIAL_BCM63XX is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
CONFIG_SERIAL_ARC=m
CONFIG_SERIAL_ARC_NR_PORTS=1
# CONFIG_SERIAL_RP2 is not set
# CONFIG_SERIAL_FSL_LPUART is not set
# CONFIG_SERIAL_FSL_LINFLEXUART is not set
# CONFIG_SERIAL_SPRD is not set
# end of Serial drivers

CONFIG_SERIAL_MCTRL_GPIO=y
CONFIG_SERIAL_NONSTANDARD=y
# CONFIG_MOXA_INTELLIO is not set
# CONFIG_MOXA_SMARTIO is not set
CONFIG_SYNCLINK_GT=m
CONFIG_N_HDLC=m
CONFIG_N_GSM=m
CONFIG_NOZOMI=m
# CONFIG_NULL_TTY is not set
CONFIG_HVC_DRIVER=y
# CONFIG_SERIAL_DEV_BUS is not set
CONFIG_PRINTER=m
# CONFIG_LP_CONSOLE is not set
CONFIG_PPDEV=m
CONFIG_VIRTIO_CONSOLE=m
CONFIG_IPMI_HANDLER=m
CONFIG_IPMI_DMI_DECODE=y
CONFIG_IPMI_PLAT_DATA=y
CONFIG_IPMI_PANIC_EVENT=y
CONFIG_IPMI_PANIC_STRING=y
CONFIG_IPMI_DEVICE_INTERFACE=m
CONFIG_IPMI_SI=m
CONFIG_IPMI_SSIF=m
CONFIG_IPMI_WATCHDOG=m
CONFIG_IPMI_POWEROFF=m
CONFIG_HW_RANDOM=y
CONFIG_HW_RANDOM_TIMERIOMEM=m
CONFIG_HW_RANDOM_INTEL=m
CONFIG_HW_RANDOM_AMD=m
# CONFIG_HW_RANDOM_BA431 is not set
CONFIG_HW_RANDOM_VIA=m
CONFIG_HW_RANDOM_VIRTIO=y
# CONFIG_HW_RANDOM_XIPHERA is not set
# CONFIG_APPLICOM is not set
# CONFIG_MWAVE is not set
CONFIG_DEVMEM=y
CONFIG_NVRAM=y
CONFIG_DEVPORT=y
CONFIG_HPET=y
CONFIG_HPET_MMAP=y
# CONFIG_HPET_MMAP_DEFAULT is not set
CONFIG_HANGCHECK_TIMER=m
CONFIG_UV_MMTIMER=m
CONFIG_TCG_TPM=y
CONFIG_HW_RANDOM_TPM=y
CONFIG_TCG_TIS_CORE=y
CONFIG_TCG_TIS=y
# CONFIG_TCG_TIS_SPI is not set
# CONFIG_TCG_TIS_I2C_CR50 is not set
CONFIG_TCG_TIS_I2C_ATMEL=m
CONFIG_TCG_TIS_I2C_INFINEON=m
CONFIG_TCG_TIS_I2C_NUVOTON=m
CONFIG_TCG_NSC=m
CONFIG_TCG_ATMEL=m
CONFIG_TCG_INFINEON=m
CONFIG_TCG_CRB=y
# CONFIG_TCG_VTPM_PROXY is not set
CONFIG_TCG_TIS_ST33ZP24=m
CONFIG_TCG_TIS_ST33ZP24_I2C=m
# CONFIG_TCG_TIS_ST33ZP24_SPI is not set
CONFIG_TELCLOCK=m
# CONFIG_XILLYBUS is not set
# CONFIG_XILLYUSB is not set
# CONFIG_RANDOM_TRUST_CPU is not set
# CONFIG_RANDOM_TRUST_BOOTLOADER is not set
# end of Character devices

#
# I2C support
#
CONFIG_I2C=y
CONFIG_ACPI_I2C_OPREGION=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_COMPAT=y
CONFIG_I2C_CHARDEV=m
CONFIG_I2C_MUX=m

#
# Multiplexer I2C Chip support
#
# CONFIG_I2C_MUX_GPIO is not set
# CONFIG_I2C_MUX_LTC4306 is not set
# CONFIG_I2C_MUX_PCA9541 is not set
# CONFIG_I2C_MUX_PCA954x is not set
# CONFIG_I2C_MUX_REG is not set
CONFIG_I2C_MUX_MLXCPLD=m
# end of Multiplexer I2C Chip support

CONFIG_I2C_HELPER_AUTO=y
CONFIG_I2C_SMBUS=y
CONFIG_I2C_ALGOBIT=y
CONFIG_I2C_ALGOPCA=m

#
# I2C Hardware Bus support
#

#
# PC SMBus host controller drivers
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
CONFIG_I2C_AMD756=m
CONFIG_I2C_AMD756_S4882=m
CONFIG_I2C_AMD8111=m
# CONFIG_I2C_AMD_MP2 is not set
CONFIG_I2C_I801=y
CONFIG_I2C_ISCH=m
CONFIG_I2C_ISMT=m
CONFIG_I2C_PIIX4=m
CONFIG_I2C_NFORCE2=m
CONFIG_I2C_NFORCE2_S4985=m
# CONFIG_I2C_NVIDIA_GPU is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
CONFIG_I2C_SIS96X=m
CONFIG_I2C_VIA=m
CONFIG_I2C_VIAPRO=m

#
# ACPI drivers
#
CONFIG_I2C_SCMI=m

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_CBUS_GPIO is not set
CONFIG_I2C_DESIGNWARE_CORE=m
# CONFIG_I2C_DESIGNWARE_SLAVE is not set
CONFIG_I2C_DESIGNWARE_PLATFORM=m
CONFIG_I2C_DESIGNWARE_BAYTRAIL=y
# CONFIG_I2C_DESIGNWARE_PCI is not set
# CONFIG_I2C_EMEV2 is not set
# CONFIG_I2C_GPIO is not set
# CONFIG_I2C_OCORES is not set
CONFIG_I2C_PCA_PLATFORM=m
CONFIG_I2C_SIMTEC=m
# CONFIG_I2C_XILINX is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_DIOLAN_U2C is not set
# CONFIG_I2C_CP2615 is not set
CONFIG_I2C_PARPORT=m
# CONFIG_I2C_ROBOTFUZZ_OSIF is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Other I2C/SMBus bus drivers
#
CONFIG_I2C_MLXCPLD=m
# CONFIG_I2C_VIRTIO is not set
# end of I2C Hardware Bus support

CONFIG_I2C_STUB=m
# CONFIG_I2C_SLAVE is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# end of I2C support

# CONFIG_I3C is not set
CONFIG_SPI=y
# CONFIG_SPI_DEBUG is not set
CONFIG_SPI_MASTER=y
# CONFIG_SPI_MEM is not set

#
# SPI Master Controller Drivers
#
# CONFIG_SPI_ALTERA is not set
# CONFIG_SPI_AXI_SPI_ENGINE is not set
# CONFIG_SPI_BITBANG is not set
# CONFIG_SPI_BUTTERFLY is not set
# CONFIG_SPI_CADENCE is not set
# CONFIG_SPI_DESIGNWARE is not set
# CONFIG_SPI_NXP_FLEXSPI is not set
# CONFIG_SPI_GPIO is not set
# CONFIG_SPI_LM70_LLP is not set
# CONFIG_SPI_LANTIQ_SSC is not set
# CONFIG_SPI_OC_TINY is not set
# CONFIG_SPI_PXA2XX is not set
# CONFIG_SPI_ROCKCHIP is not set
# CONFIG_SPI_SC18IS602 is not set
# CONFIG_SPI_SIFIVE is not set
# CONFIG_SPI_MXIC is not set
# CONFIG_SPI_XCOMM is not set
# CONFIG_SPI_XILINX is not set
# CONFIG_SPI_ZYNQMP_GQSPI is not set
# CONFIG_SPI_AMD is not set

#
# SPI Multiplexer support
#
# CONFIG_SPI_MUX is not set

#
# SPI Protocol Masters
#
# CONFIG_SPI_SPIDEV is not set
# CONFIG_SPI_LOOPBACK_TEST is not set
# CONFIG_SPI_TLE62X0 is not set
# CONFIG_SPI_SLAVE is not set
CONFIG_SPI_DYNAMIC=y
# CONFIG_SPMI is not set
# CONFIG_HSI is not set
CONFIG_PPS=y
# CONFIG_PPS_DEBUG is not set

#
# PPS clients support
#
# CONFIG_PPS_CLIENT_KTIMER is not set
CONFIG_PPS_CLIENT_LDISC=m
CONFIG_PPS_CLIENT_PARPORT=m
CONFIG_PPS_CLIENT_GPIO=m

#
# PPS generators support
#

#
# PTP clock support
#
CONFIG_PTP_1588_CLOCK=y
CONFIG_PTP_1588_CLOCK_OPTIONAL=y
# CONFIG_DP83640_PHY is not set
# CONFIG_PTP_1588_CLOCK_INES is not set
CONFIG_PTP_1588_CLOCK_KVM=m
# CONFIG_PTP_1588_CLOCK_IDT82P33 is not set
# CONFIG_PTP_1588_CLOCK_IDTCM is not set
# CONFIG_PTP_1588_CLOCK_VMW is not set
# end of PTP clock support

CONFIG_PINCTRL=y
CONFIG_PINMUX=y
CONFIG_PINCONF=y
CONFIG_GENERIC_PINCONF=y
# CONFIG_DEBUG_PINCTRL is not set
CONFIG_PINCTRL_AMD=m
# CONFIG_PINCTRL_MCP23S08 is not set
# CONFIG_PINCTRL_SX150X is not set
CONFIG_PINCTRL_BAYTRAIL=y
# CONFIG_PINCTRL_CHERRYVIEW is not set
# CONFIG_PINCTRL_LYNXPOINT is not set
CONFIG_PINCTRL_INTEL=y
# CONFIG_PINCTRL_ALDERLAKE is not set
CONFIG_PINCTRL_BROXTON=m
CONFIG_PINCTRL_CANNONLAKE=m
CONFIG_PINCTRL_CEDARFORK=m
CONFIG_PINCTRL_DENVERTON=m
# CONFIG_PINCTRL_ELKHARTLAKE is not set
# CONFIG_PINCTRL_EMMITSBURG is not set
CONFIG_PINCTRL_GEMINILAKE=m
# CONFIG_PINCTRL_ICELAKE is not set
# CONFIG_PINCTRL_JASPERLAKE is not set
# CONFIG_PINCTRL_LAKEFIELD is not set
CONFIG_PINCTRL_LEWISBURG=m
CONFIG_PINCTRL_SUNRISEPOINT=m
# CONFIG_PINCTRL_TIGERLAKE is not set

#
# Renesas pinctrl drivers
#
# end of Renesas pinctrl drivers

CONFIG_GPIOLIB=y
CONFIG_GPIOLIB_FASTPATH_LIMIT=512
CONFIG_GPIO_ACPI=y
CONFIG_GPIOLIB_IRQCHIP=y
# CONFIG_DEBUG_GPIO is not set
CONFIG_GPIO_CDEV=y
CONFIG_GPIO_CDEV_V1=y
CONFIG_GPIO_GENERIC=m

#
# Memory mapped GPIO drivers
#
CONFIG_GPIO_AMDPT=m
# CONFIG_GPIO_DWAPB is not set
# CONFIG_GPIO_EXAR is not set
# CONFIG_GPIO_GENERIC_PLATFORM is not set
CONFIG_GPIO_ICH=m
# CONFIG_GPIO_MB86S7X is not set
# CONFIG_GPIO_VX855 is not set
# CONFIG_GPIO_AMD_FCH is not set
# end of Memory mapped GPIO drivers

#
# Port-mapped I/O GPIO drivers
#
# CONFIG_GPIO_F7188X is not set
# CONFIG_GPIO_IT87 is not set
# CONFIG_GPIO_SCH is not set
# CONFIG_GPIO_SCH311X is not set
# CONFIG_GPIO_WINBOND is not set
# CONFIG_GPIO_WS16C48 is not set
# end of Port-mapped I/O GPIO drivers

#
# I2C GPIO expanders
#
# CONFIG_GPIO_ADP5588 is not set
# CONFIG_GPIO_MAX7300 is not set
# CONFIG_GPIO_MAX732X is not set
# CONFIG_GPIO_PCA953X is not set
# CONFIG_GPIO_PCA9570 is not set
# CONFIG_GPIO_PCF857X is not set
# CONFIG_GPIO_TPIC2810 is not set
# end of I2C GPIO expanders

#
# MFD GPIO expanders
#
# end of MFD GPIO expanders

#
# PCI GPIO expanders
#
# CONFIG_GPIO_AMD8111 is not set
# CONFIG_GPIO_BT8XX is not set
# CONFIG_GPIO_ML_IOH is not set
# CONFIG_GPIO_PCI_IDIO_16 is not set
# CONFIG_GPIO_PCIE_IDIO_24 is not set
# CONFIG_GPIO_RDC321X is not set
# end of PCI GPIO expanders

#
# SPI GPIO expanders
#
# CONFIG_GPIO_MAX3191X is not set
# CONFIG_GPIO_MAX7301 is not set
# CONFIG_GPIO_MC33880 is not set
# CONFIG_GPIO_PISOSR is not set
# CONFIG_GPIO_XRA1403 is not set
# end of SPI GPIO expanders

#
# USB GPIO expanders
#
# end of USB GPIO expanders

#
# Virtual GPIO drivers
#
# CONFIG_GPIO_AGGREGATOR is not set
# CONFIG_GPIO_MOCKUP is not set
# end of Virtual GPIO drivers

# CONFIG_W1 is not set
CONFIG_POWER_RESET=y
# CONFIG_POWER_RESET_RESTART is not set
CONFIG_POWER_SUPPLY=y
# CONFIG_POWER_SUPPLY_DEBUG is not set
CONFIG_POWER_SUPPLY_HWMON=y
# CONFIG_PDA_POWER is not set
# CONFIG_TEST_POWER is not set
# CONFIG_CHARGER_ADP5061 is not set
# CONFIG_BATTERY_CW2015 is not set
# CONFIG_BATTERY_DS2780 is not set
# CONFIG_BATTERY_DS2781 is not set
# CONFIG_BATTERY_DS2782 is not set
# CONFIG_BATTERY_SBS is not set
# CONFIG_CHARGER_SBS is not set
# CONFIG_MANAGER_SBS is not set
# CONFIG_BATTERY_BQ27XXX is not set
# CONFIG_BATTERY_MAX17040 is not set
# CONFIG_BATTERY_MAX17042 is not set
# CONFIG_CHARGER_MAX8903 is not set
# CONFIG_CHARGER_LP8727 is not set
# CONFIG_CHARGER_GPIO is not set
# CONFIG_CHARGER_LT3651 is not set
# CONFIG_CHARGER_LTC4162L is not set
# CONFIG_CHARGER_BQ2415X is not set
# CONFIG_CHARGER_BQ24257 is not set
# CONFIG_CHARGER_BQ24735 is not set
# CONFIG_CHARGER_BQ2515X is not set
# CONFIG_CHARGER_BQ25890 is not set
# CONFIG_CHARGER_BQ25980 is not set
# CONFIG_CHARGER_BQ256XX is not set
# CONFIG_BATTERY_GAUGE_LTC2941 is not set
# CONFIG_BATTERY_GOLDFISH is not set
# CONFIG_BATTERY_RT5033 is not set
# CONFIG_CHARGER_RT9455 is not set
# CONFIG_CHARGER_BD99954 is not set
CONFIG_HWMON=y
CONFIG_HWMON_VID=m
# CONFIG_HWMON_DEBUG_CHIP is not set

#
# Native drivers
#
CONFIG_SENSORS_ABITUGURU=m
CONFIG_SENSORS_ABITUGURU3=m
# CONFIG_SENSORS_AD7314 is not set
CONFIG_SENSORS_AD7414=m
CONFIG_SENSORS_AD7418=m
CONFIG_SENSORS_ADM1021=m
CONFIG_SENSORS_ADM1025=m
CONFIG_SENSORS_ADM1026=m
CONFIG_SENSORS_ADM1029=m
CONFIG_SENSORS_ADM1031=m
# CONFIG_SENSORS_ADM1177 is not set
CONFIG_SENSORS_ADM9240=m
CONFIG_SENSORS_ADT7X10=m
# CONFIG_SENSORS_ADT7310 is not set
CONFIG_SENSORS_ADT7410=m
CONFIG_SENSORS_ADT7411=m
CONFIG_SENSORS_ADT7462=m
CONFIG_SENSORS_ADT7470=m
CONFIG_SENSORS_ADT7475=m
# CONFIG_SENSORS_AHT10 is not set
# CONFIG_SENSORS_AQUACOMPUTER_D5NEXT is not set
# CONFIG_SENSORS_AS370 is not set
CONFIG_SENSORS_ASC7621=m
# CONFIG_SENSORS_AXI_FAN_CONTROL is not set
CONFIG_SENSORS_K8TEMP=m
CONFIG_SENSORS_K10TEMP=m
CONFIG_SENSORS_FAM15H_POWER=m
CONFIG_SENSORS_APPLESMC=m
CONFIG_SENSORS_ASB100=m
# CONFIG_SENSORS_ASPEED is not set
CONFIG_SENSORS_ATXP1=m
# CONFIG_SENSORS_CORSAIR_CPRO is not set
# CONFIG_SENSORS_CORSAIR_PSU is not set
# CONFIG_SENSORS_DRIVETEMP is not set
CONFIG_SENSORS_DS620=m
CONFIG_SENSORS_DS1621=m
CONFIG_SENSORS_DELL_SMM=m
CONFIG_SENSORS_I5K_AMB=m
CONFIG_SENSORS_F71805F=m
CONFIG_SENSORS_F71882FG=m
CONFIG_SENSORS_F75375S=m
CONFIG_SENSORS_FSCHMD=m
# CONFIG_SENSORS_FTSTEUTATES is not set
CONFIG_SENSORS_GL518SM=m
CONFIG_SENSORS_GL520SM=m
CONFIG_SENSORS_G760A=m
# CONFIG_SENSORS_G762 is not set
# CONFIG_SENSORS_HIH6130 is not set
CONFIG_SENSORS_IBMAEM=m
CONFIG_SENSORS_IBMPEX=m
CONFIG_SENSORS_I5500=m
CONFIG_SENSORS_CORETEMP=m
CONFIG_SENSORS_IT87=m
CONFIG_SENSORS_JC42=m
# CONFIG_SENSORS_POWR1220 is not set
CONFIG_SENSORS_LINEAGE=m
# CONFIG_SENSORS_LTC2945 is not set
# CONFIG_SENSORS_LTC2947_I2C is not set
# CONFIG_SENSORS_LTC2947_SPI is not set
# CONFIG_SENSORS_LTC2990 is not set
# CONFIG_SENSORS_LTC2992 is not set
CONFIG_SENSORS_LTC4151=m
CONFIG_SENSORS_LTC4215=m
# CONFIG_SENSORS_LTC4222 is not set
CONFIG_SENSORS_LTC4245=m
# CONFIG_SENSORS_LTC4260 is not set
CONFIG_SENSORS_LTC4261=m
# CONFIG_SENSORS_MAX1111 is not set
# CONFIG_SENSORS_MAX127 is not set
CONFIG_SENSORS_MAX16065=m
CONFIG_SENSORS_MAX1619=m
CONFIG_SENSORS_MAX1668=m
CONFIG_SENSORS_MAX197=m
# CONFIG_SENSORS_MAX31722 is not set
# CONFIG_SENSORS_MAX31730 is not set
# CONFIG_SENSORS_MAX6621 is not set
CONFIG_SENSORS_MAX6639=m
CONFIG_SENSORS_MAX6642=m
CONFIG_SENSORS_MAX6650=m
CONFIG_SENSORS_MAX6697=m
# CONFIG_SENSORS_MAX31790 is not set
CONFIG_SENSORS_MCP3021=m
# CONFIG_SENSORS_MLXREG_FAN is not set
# CONFIG_SENSORS_TC654 is not set
# CONFIG_SENSORS_TPS23861 is not set
# CONFIG_SENSORS_MR75203 is not set
# CONFIG_SENSORS_ADCXX is not set
CONFIG_SENSORS_LM63=m
# CONFIG_SENSORS_LM70 is not set
CONFIG_SENSORS_LM73=m
CONFIG_SENSORS_LM75=m
CONFIG_SENSORS_LM77=m
CONFIG_SENSORS_LM78=m
CONFIG_SENSORS_LM80=m
CONFIG_SENSORS_LM83=m
CONFIG_SENSORS_LM85=m
CONFIG_SENSORS_LM87=m
CONFIG_SENSORS_LM90=m
CONFIG_SENSORS_LM92=m
CONFIG_SENSORS_LM93=m
CONFIG_SENSORS_LM95234=m
CONFIG_SENSORS_LM95241=m
CONFIG_SENSORS_LM95245=m
CONFIG_SENSORS_PC87360=m
CONFIG_SENSORS_PC87427=m
CONFIG_SENSORS_NTC_THERMISTOR=m
# CONFIG_SENSORS_NCT6683 is not set
CONFIG_SENSORS_NCT6775=m
# CONFIG_SENSORS_NCT7802 is not set
# CONFIG_SENSORS_NCT7904 is not set
# CONFIG_SENSORS_NPCM7XX is not set
# CONFIG_SENSORS_NZXT_KRAKEN2 is not set
CONFIG_SENSORS_PCF8591=m
CONFIG_PMBUS=m
CONFIG_SENSORS_PMBUS=m
# CONFIG_SENSORS_ADM1266 is not set
CONFIG_SENSORS_ADM1275=m
# CONFIG_SENSORS_BEL_PFE is not set
# CONFIG_SENSORS_BPA_RS600 is not set
# CONFIG_SENSORS_FSP_3Y is not set
# CONFIG_SENSORS_IBM_CFFPS is not set
# CONFIG_SENSORS_DPS920AB is not set
# CONFIG_SENSORS_INSPUR_IPSPS is not set
# CONFIG_SENSORS_IR35221 is not set
# CONFIG_SENSORS_IR36021 is not set
# CONFIG_SENSORS_IR38064 is not set
# CONFIG_SENSORS_IRPS5401 is not set
# CONFIG_SENSORS_ISL68137 is not set
CONFIG_SENSORS_LM25066=m
CONFIG_SENSORS_LTC2978=m
# CONFIG_SENSORS_LTC3815 is not set
# CONFIG_SENSORS_MAX15301 is not set
CONFIG_SENSORS_MAX16064=m
# CONFIG_SENSORS_MAX16601 is not set
# CONFIG_SENSORS_MAX20730 is not set
# CONFIG_SENSORS_MAX20751 is not set
# CONFIG_SENSORS_MAX31785 is not set
CONFIG_SENSORS_MAX34440=m
CONFIG_SENSORS_MAX8688=m
# CONFIG_SENSORS_MP2888 is not set
# CONFIG_SENSORS_MP2975 is not set
# CONFIG_SENSORS_PIM4328 is not set
# CONFIG_SENSORS_PM6764TR is not set
# CONFIG_SENSORS_PXE1610 is not set
# CONFIG_SENSORS_Q54SJ108A2 is not set
# CONFIG_SENSORS_STPDDC60 is not set
# CONFIG_SENSORS_TPS40422 is not set
# CONFIG_SENSORS_TPS53679 is not set
CONFIG_SENSORS_UCD9000=m
CONFIG_SENSORS_UCD9200=m
# CONFIG_SENSORS_XDPE122 is not set
CONFIG_SENSORS_ZL6100=m
# CONFIG_SENSORS_SBTSI is not set
# CONFIG_SENSORS_SBRMI is not set
CONFIG_SENSORS_SHT15=m
CONFIG_SENSORS_SHT21=m
# CONFIG_SENSORS_SHT3x is not set
# CONFIG_SENSORS_SHT4x is not set
# CONFIG_SENSORS_SHTC1 is not set
CONFIG_SENSORS_SIS5595=m
CONFIG_SENSORS_DME1737=m
CONFIG_SENSORS_EMC1403=m
# CONFIG_SENSORS_EMC2103 is not set
CONFIG_SENSORS_EMC6W201=m
CONFIG_SENSORS_SMSC47M1=m
CONFIG_SENSORS_SMSC47M192=m
CONFIG_SENSORS_SMSC47B397=m
CONFIG_SENSORS_SCH56XX_COMMON=m
CONFIG_SENSORS_SCH5627=m
CONFIG_SENSORS_SCH5636=m
# CONFIG_SENSORS_STTS751 is not set
# CONFIG_SENSORS_SMM665 is not set
# CONFIG_SENSORS_ADC128D818 is not set
CONFIG_SENSORS_ADS7828=m
# CONFIG_SENSORS_ADS7871 is not set
CONFIG_SENSORS_AMC6821=m
CONFIG_SENSORS_INA209=m
CONFIG_SENSORS_INA2XX=m
# CONFIG_SENSORS_INA3221 is not set
# CONFIG_SENSORS_TC74 is not set
CONFIG_SENSORS_THMC50=m
CONFIG_SENSORS_TMP102=m
# CONFIG_SENSORS_TMP103 is not set
# CONFIG_SENSORS_TMP108 is not set
CONFIG_SENSORS_TMP401=m
CONFIG_SENSORS_TMP421=m
# CONFIG_SENSORS_TMP513 is not set
CONFIG_SENSORS_VIA_CPUTEMP=m
CONFIG_SENSORS_VIA686A=m
CONFIG_SENSORS_VT1211=m
CONFIG_SENSORS_VT8231=m
# CONFIG_SENSORS_W83773G is not set
CONFIG_SENSORS_W83781D=m
CONFIG_SENSORS_W83791D=m
CONFIG_SENSORS_W83792D=m
CONFIG_SENSORS_W83793=m
CONFIG_SENSORS_W83795=m
# CONFIG_SENSORS_W83795_FANCTRL is not set
CONFIG_SENSORS_W83L785TS=m
CONFIG_SENSORS_W83L786NG=m
CONFIG_SENSORS_W83627HF=m
CONFIG_SENSORS_W83627EHF=m
# CONFIG_SENSORS_XGENE is not set

#
# ACPI drivers
#
CONFIG_SENSORS_ACPI_POWER=m
CONFIG_SENSORS_ATK0110=m
CONFIG_THERMAL=y
# CONFIG_THERMAL_NETLINK is not set
# CONFIG_THERMAL_STATISTICS is not set
CONFIG_THERMAL_EMERGENCY_POWEROFF_DELAY_MS=0
CONFIG_THERMAL_HWMON=y
CONFIG_THERMAL_WRITABLE_TRIPS=y
CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE=y
# CONFIG_THERMAL_DEFAULT_GOV_FAIR_SHARE is not set
# CONFIG_THERMAL_DEFAULT_GOV_USER_SPACE is not set
CONFIG_THERMAL_GOV_FAIR_SHARE=y
CONFIG_THERMAL_GOV_STEP_WISE=y
CONFIG_THERMAL_GOV_BANG_BANG=y
CONFIG_THERMAL_GOV_USER_SPACE=y
# CONFIG_THERMAL_EMULATION is not set

#
# Intel thermal drivers
#
CONFIG_INTEL_POWERCLAMP=m
CONFIG_X86_THERMAL_VECTOR=y
CONFIG_X86_PKG_TEMP_THERMAL=m
CONFIG_INTEL_SOC_DTS_IOSF_CORE=m
# CONFIG_INTEL_SOC_DTS_THERMAL is not set

#
# ACPI INT340X thermal drivers
#
CONFIG_INT340X_THERMAL=m
CONFIG_ACPI_THERMAL_REL=m
# CONFIG_INT3406_THERMAL is not set
CONFIG_PROC_THERMAL_MMIO_RAPL=m
# end of ACPI INT340X thermal drivers

CONFIG_INTEL_PCH_THERMAL=m
# CONFIG_INTEL_TCC_COOLING is not set
# CONFIG_INTEL_MENLOW is not set
# end of Intel thermal drivers

CONFIG_WATCHDOG=y
CONFIG_WATCHDOG_CORE=y
# CONFIG_WATCHDOG_NOWAYOUT is not set
CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED=y
CONFIG_WATCHDOG_OPEN_TIMEOUT=0
CONFIG_WATCHDOG_SYSFS=y
# CONFIG_WATCHDOG_HRTIMER_PRETIMEOUT is not set

#
# Watchdog Pretimeout Governors
#
# CONFIG_WATCHDOG_PRETIMEOUT_GOV is not set

#
# Watchdog Device Drivers
#
CONFIG_SOFT_WATCHDOG=m
CONFIG_WDAT_WDT=m
# CONFIG_XILINX_WATCHDOG is not set
# CONFIG_ZIIRAVE_WATCHDOG is not set
# CONFIG_MLX_WDT is not set
# CONFIG_CADENCE_WATCHDOG is not set
# CONFIG_DW_WATCHDOG is not set
# CONFIG_MAX63XX_WATCHDOG is not set
# CONFIG_ACQUIRE_WDT is not set
# CONFIG_ADVANTECH_WDT is not set
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
# CONFIG_EBC_C384_WDT is not set
CONFIG_F71808E_WDT=m
CONFIG_SP5100_TCO=m
CONFIG_SBC_FITPC2_WATCHDOG=m
# CONFIG_EUROTECH_WDT is not set
CONFIG_IB700_WDT=m
CONFIG_IBMASR=m
# CONFIG_WAFER_WDT is not set
CONFIG_I6300ESB_WDT=y
CONFIG_IE6XX_WDT=m
CONFIG_ITCO_WDT=y
CONFIG_ITCO_VENDOR_SUPPORT=y
CONFIG_IT8712F_WDT=m
CONFIG_IT87_WDT=m
CONFIG_HP_WATCHDOG=m
CONFIG_HPWDT_NMI_DECODING=y
# CONFIG_SC1200_WDT is not set
# CONFIG_PC87413_WDT is not set
CONFIG_NV_TCO=m
# CONFIG_60XX_WDT is not set
# CONFIG_CPU5_WDT is not set
CONFIG_SMSC_SCH311X_WDT=m
# CONFIG_SMSC37B787_WDT is not set
# CONFIG_TQMX86_WDT is not set
CONFIG_VIA_WDT=m
CONFIG_W83627HF_WDT=m
CONFIG_W83877F_WDT=m
CONFIG_W83977F_WDT=m
CONFIG_MACHZ_WDT=m
# CONFIG_SBC_EPX_C3_WATCHDOG is not set
CONFIG_INTEL_MEI_WDT=m
# CONFIG_NI903X_WDT is not set
# CONFIG_NIC7018_WDT is not set
# CONFIG_MEN_A21_WDT is not set

#
# PCI-based Watchdog Cards
#
CONFIG_PCIPCWATCHDOG=m
CONFIG_WDTPCI=m

#
# USB-based Watchdog Cards
#
# CONFIG_USBPCWATCHDOG is not set
CONFIG_SSB_POSSIBLE=y
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y
CONFIG_BCMA=m
CONFIG_BCMA_HOST_PCI_POSSIBLE=y
CONFIG_BCMA_HOST_PCI=y
# CONFIG_BCMA_HOST_SOC is not set
CONFIG_BCMA_DRIVER_PCI=y
CONFIG_BCMA_DRIVER_GMAC_CMN=y
CONFIG_BCMA_DRIVER_GPIO=y
# CONFIG_BCMA_DEBUG is not set

#
# Multifunction device drivers
#
CONFIG_MFD_CORE=y
# CONFIG_MFD_AS3711 is not set
# CONFIG_PMIC_ADP5520 is not set
# CONFIG_MFD_AAT2870_CORE is not set
# CONFIG_MFD_BCM590XX is not set
# CONFIG_MFD_BD9571MWV is not set
# CONFIG_MFD_AXP20X_I2C is not set
# CONFIG_MFD_MADERA is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_MFD_DA9052_SPI is not set
# CONFIG_MFD_DA9052_I2C is not set
# CONFIG_MFD_DA9055 is not set
# CONFIG_MFD_DA9062 is not set
# CONFIG_MFD_DA9063 is not set
# CONFIG_MFD_DA9150 is not set
# CONFIG_MFD_DLN2 is not set
# CONFIG_MFD_MC13XXX_SPI is not set
# CONFIG_MFD_MC13XXX_I2C is not set
# CONFIG_MFD_MP2629 is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_HTC_I2CPLD is not set
# CONFIG_MFD_INTEL_QUARK_I2C_GPIO is not set
CONFIG_LPC_ICH=y
CONFIG_LPC_SCH=m
# CONFIG_INTEL_SOC_PMIC_CHTDC_TI is not set
CONFIG_MFD_INTEL_LPSS=y
CONFIG_MFD_INTEL_LPSS_ACPI=y
CONFIG_MFD_INTEL_LPSS_PCI=y
# CONFIG_MFD_INTEL_PMC_BXT is not set
# CONFIG_MFD_INTEL_PMT is not set
# CONFIG_MFD_IQS62X is not set
# CONFIG_MFD_JANZ_CMODIO is not set
# CONFIG_MFD_KEMPLD is not set
# CONFIG_MFD_88PM800 is not set
# CONFIG_MFD_88PM805 is not set
# CONFIG_MFD_88PM860X is not set
# CONFIG_MFD_MAX14577 is not set
# CONFIG_MFD_MAX77693 is not set
# CONFIG_MFD_MAX77843 is not set
# CONFIG_MFD_MAX8907 is not set
# CONFIG_MFD_MAX8925 is not set
# CONFIG_MFD_MAX8997 is not set
# CONFIG_MFD_MAX8998 is not set
# CONFIG_MFD_MT6360 is not set
# CONFIG_MFD_MT6397 is not set
# CONFIG_MFD_MENF21BMC is not set
# CONFIG_EZX_PCAP is not set
# CONFIG_MFD_VIPERBOARD is not set
# CONFIG_MFD_RETU is not set
# CONFIG_MFD_PCF50633 is not set
# CONFIG_MFD_RDC321X is not set
# CONFIG_MFD_RT4831 is not set
# CONFIG_MFD_RT5033 is not set
# CONFIG_MFD_RC5T583 is not set
# CONFIG_MFD_SI476X_CORE is not set
CONFIG_MFD_SM501=m
CONFIG_MFD_SM501_GPIO=y
# CONFIG_MFD_SKY81452 is not set
# CONFIG_MFD_SYSCON is not set
# CONFIG_MFD_TI_AM335X_TSCADC is not set
# CONFIG_MFD_LP3943 is not set
# CONFIG_MFD_LP8788 is not set
# CONFIG_MFD_TI_LMU is not set
# CONFIG_MFD_PALMAS is not set
# CONFIG_TPS6105X is not set
# CONFIG_TPS65010 is not set
# CONFIG_TPS6507X is not set
# CONFIG_MFD_TPS65086 is not set
# CONFIG_MFD_TPS65090 is not set
# CONFIG_MFD_TI_LP873X is not set
# CONFIG_MFD_TPS6586X is not set
# CONFIG_MFD_TPS65910 is not set
# CONFIG_MFD_TPS65912_I2C is not set
# CONFIG_MFD_TPS65912_SPI is not set
# CONFIG_MFD_TPS80031 is not set
# CONFIG_TWL4030_CORE is not set
# CONFIG_TWL6040_CORE is not set
# CONFIG_MFD_WL1273_CORE is not set
# CONFIG_MFD_LM3533 is not set
# CONFIG_MFD_TQMX86 is not set
CONFIG_MFD_VX855=m
# CONFIG_MFD_ARIZONA_I2C is not set
# CONFIG_MFD_ARIZONA_SPI is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM831X_I2C is not set
# CONFIG_MFD_WM831X_SPI is not set
# CONFIG_MFD_WM8350_I2C is not set
# CONFIG_MFD_WM8994 is not set
# CONFIG_MFD_ATC260X_I2C is not set
# CONFIG_MFD_INTEL_M10_BMC is not set
# end of Multifunction device drivers

# CONFIG_REGULATOR is not set
CONFIG_RC_CORE=m
CONFIG_RC_MAP=m
CONFIG_LIRC=y
CONFIG_RC_DECODERS=y
CONFIG_IR_NEC_DECODER=m
CONFIG_IR_RC5_DECODER=m
CONFIG_IR_RC6_DECODER=m
CONFIG_IR_JVC_DECODER=m
CONFIG_IR_SONY_DECODER=m
CONFIG_IR_SANYO_DECODER=m
# CONFIG_IR_SHARP_DECODER is not set
CONFIG_IR_MCE_KBD_DECODER=m
# CONFIG_IR_XMP_DECODER is not set
CONFIG_IR_IMON_DECODER=m
# CONFIG_IR_RCMM_DECODER is not set
CONFIG_RC_DEVICES=y
# CONFIG_RC_ATI_REMOTE is not set
CONFIG_IR_ENE=m
# CONFIG_IR_IMON is not set
# CONFIG_IR_IMON_RAW is not set
# CONFIG_IR_MCEUSB is not set
CONFIG_IR_ITE_CIR=m
CONFIG_IR_FINTEK=m
CONFIG_IR_NUVOTON=m
# CONFIG_IR_REDRAT3 is not set
# CONFIG_IR_STREAMZAP is not set
CONFIG_IR_WINBOND_CIR=m
# CONFIG_IR_IGORPLUGUSB is not set
# CONFIG_IR_IGUANA is not set
# CONFIG_IR_TTUSBIR is not set
# CONFIG_RC_LOOPBACK is not set
CONFIG_IR_SERIAL=m
CONFIG_IR_SERIAL_TRANSMITTER=y
CONFIG_IR_SIR=m
# CONFIG_RC_XBOX_DVD is not set
# CONFIG_IR_TOY is not set
CONFIG_MEDIA_CEC_SUPPORT=y
# CONFIG_CEC_CH7322 is not set
# CONFIG_CEC_SECO is not set
# CONFIG_USB_PULSE8_CEC is not set
# CONFIG_USB_RAINSHADOW_CEC is not set
CONFIG_MEDIA_SUPPORT=m
# CONFIG_MEDIA_SUPPORT_FILTER is not set
# CONFIG_MEDIA_SUBDRV_AUTOSELECT is not set

#
# Media device types
#
CONFIG_MEDIA_CAMERA_SUPPORT=y
CONFIG_MEDIA_ANALOG_TV_SUPPORT=y
CONFIG_MEDIA_DIGITAL_TV_SUPPORT=y
CONFIG_MEDIA_RADIO_SUPPORT=y
CONFIG_MEDIA_SDR_SUPPORT=y
CONFIG_MEDIA_PLATFORM_SUPPORT=y
CONFIG_MEDIA_TEST_SUPPORT=y
# end of Media device types

#
# Media core support
#
CONFIG_VIDEO_DEV=m
CONFIG_MEDIA_CONTROLLER=y
CONFIG_DVB_CORE=m
# end of Media core support

#
# Video4Linux options
#
CONFIG_VIDEO_V4L2=m
CONFIG_VIDEO_V4L2_I2C=y
CONFIG_VIDEO_V4L2_SUBDEV_API=y
# CONFIG_VIDEO_ADV_DEBUG is not set
# CONFIG_VIDEO_FIXED_MINOR_RANGES is not set
# end of Video4Linux options

#
# Media controller options
#
# CONFIG_MEDIA_CONTROLLER_DVB is not set
# end of Media controller options

#
# Digital TV options
#
# CONFIG_DVB_MMAP is not set
CONFIG_DVB_NET=y
CONFIG_DVB_MAX_ADAPTERS=16
CONFIG_DVB_DYNAMIC_MINORS=y
# CONFIG_DVB_DEMUX_SECTION_LOSS_LOG is not set
# CONFIG_DVB_ULE_DEBUG is not set
# end of Digital TV options

#
# Media drivers
#
# CONFIG_MEDIA_USB_SUPPORT is not set
# CONFIG_MEDIA_PCI_SUPPORT is not set
CONFIG_RADIO_ADAPTERS=y
# CONFIG_RADIO_SI470X is not set
# CONFIG_RADIO_SI4713 is not set
# CONFIG_USB_MR800 is not set
# CONFIG_USB_DSBR is not set
# CONFIG_RADIO_MAXIRADIO is not set
# CONFIG_RADIO_SHARK is not set
# CONFIG_RADIO_SHARK2 is not set
# CONFIG_USB_KEENE is not set
# CONFIG_USB_RAREMONO is not set
# CONFIG_USB_MA901 is not set
# CONFIG_RADIO_TEA5764 is not set
# CONFIG_RADIO_SAA7706H is not set
# CONFIG_RADIO_TEF6862 is not set
# CONFIG_RADIO_WL1273 is not set
CONFIG_VIDEOBUF2_CORE=m
CONFIG_VIDEOBUF2_V4L2=m
CONFIG_VIDEOBUF2_MEMOPS=m
CONFIG_VIDEOBUF2_VMALLOC=m
# CONFIG_V4L_PLATFORM_DRIVERS is not set
# CONFIG_V4L_MEM2MEM_DRIVERS is not set
# CONFIG_DVB_PLATFORM_DRIVERS is not set
# CONFIG_SDR_PLATFORM_DRIVERS is not set

#
# MMC/SDIO DVB adapters
#
# CONFIG_SMS_SDIO_DRV is not set
# CONFIG_V4L_TEST_DRIVERS is not set
# CONFIG_DVB_TEST_DRIVERS is not set

#
# FireWire (IEEE 1394) Adapters
#
# CONFIG_DVB_FIREDTV is not set
# end of Media drivers

#
# Media ancillary drivers
#
CONFIG_MEDIA_ATTACH=y
CONFIG_VIDEO_IR_I2C=m

#
# Audio decoders, processors and mixers
#
# CONFIG_VIDEO_TVAUDIO is not set
# CONFIG_VIDEO_TDA7432 is not set
# CONFIG_VIDEO_TDA9840 is not set
# CONFIG_VIDEO_TEA6415C is not set
# CONFIG_VIDEO_TEA6420 is not set
# CONFIG_VIDEO_MSP3400 is not set
# CONFIG_VIDEO_CS3308 is not set
# CONFIG_VIDEO_CS5345 is not set
# CONFIG_VIDEO_CS53L32A is not set
# CONFIG_VIDEO_TLV320AIC23B is not set
# CONFIG_VIDEO_UDA1342 is not set
# CONFIG_VIDEO_WM8775 is not set
# CONFIG_VIDEO_WM8739 is not set
# CONFIG_VIDEO_VP27SMPX is not set
# CONFIG_VIDEO_SONY_BTF_MPX is not set
# end of Audio decoders, processors and mixers

#
# RDS decoders
#
# CONFIG_VIDEO_SAA6588 is not set
# end of RDS decoders

#
# Video decoders
#
# CONFIG_VIDEO_ADV7180 is not set
# CONFIG_VIDEO_ADV7183 is not set
# CONFIG_VIDEO_ADV7604 is not set
# CONFIG_VIDEO_ADV7842 is not set
# CONFIG_VIDEO_BT819 is not set
# CONFIG_VIDEO_BT856 is not set
# CONFIG_VIDEO_BT866 is not set
# CONFIG_VIDEO_KS0127 is not set
# CONFIG_VIDEO_ML86V7667 is not set
# CONFIG_VIDEO_SAA7110 is not set
# CONFIG_VIDEO_SAA711X is not set
# CONFIG_VIDEO_TC358743 is not set
# CONFIG_VIDEO_TVP514X is not set
# CONFIG_VIDEO_TVP5150 is not set
# CONFIG_VIDEO_TVP7002 is not set
# CONFIG_VIDEO_TW2804 is not set
# CONFIG_VIDEO_TW9903 is not set
# CONFIG_VIDEO_TW9906 is not set
# CONFIG_VIDEO_TW9910 is not set
# CONFIG_VIDEO_VPX3220 is not set

#
# Video and audio decoders
#
# CONFIG_VIDEO_SAA717X is not set
# CONFIG_VIDEO_CX25840 is not set
# end of Video decoders

#
# Video encoders
#
# CONFIG_VIDEO_SAA7127 is not set
# CONFIG_VIDEO_SAA7185 is not set
# CONFIG_VIDEO_ADV7170 is not set
# CONFIG_VIDEO_ADV7175 is not set
# CONFIG_VIDEO_ADV7343 is not set
# CONFIG_VIDEO_ADV7393 is not set
# CONFIG_VIDEO_ADV7511 is not set
# CONFIG_VIDEO_AD9389B is not set
# CONFIG_VIDEO_AK881X is not set
# CONFIG_VIDEO_THS8200 is not set
# end of Video encoders

#
# Video improvement chips
#
# CONFIG_VIDEO_UPD64031A is not set
# CONFIG_VIDEO_UPD64083 is not set
# end of Video improvement chips

#
# Audio/Video compression chips
#
# CONFIG_VIDEO_SAA6752HS is not set
# end of Audio/Video compression chips

#
# SDR tuner chips
#
# CONFIG_SDR_MAX2175 is not set
# end of SDR tuner chips

#
# Miscellaneous helper chips
#
# CONFIG_VIDEO_THS7303 is not set
# CONFIG_VIDEO_M52790 is not set
# CONFIG_VIDEO_I2C is not set
# CONFIG_VIDEO_ST_MIPID02 is not set
# end of Miscellaneous helper chips

#
# Camera sensor devices
#
# CONFIG_VIDEO_HI556 is not set
# CONFIG_VIDEO_IMX208 is not set
# CONFIG_VIDEO_IMX214 is not set
# CONFIG_VIDEO_IMX219 is not set
# CONFIG_VIDEO_IMX258 is not set
# CONFIG_VIDEO_IMX274 is not set
# CONFIG_VIDEO_IMX290 is not set
# CONFIG_VIDEO_IMX319 is not set
# CONFIG_VIDEO_IMX355 is not set
# CONFIG_VIDEO_OV02A10 is not set
# CONFIG_VIDEO_OV2640 is not set
# CONFIG_VIDEO_OV2659 is not set
# CONFIG_VIDEO_OV2680 is not set
# CONFIG_VIDEO_OV2685 is not set
# CONFIG_VIDEO_OV2740 is not set
# CONFIG_VIDEO_OV5647 is not set
# CONFIG_VIDEO_OV5648 is not set
# CONFIG_VIDEO_OV6650 is not set
# CONFIG_VIDEO_OV5670 is not set
# CONFIG_VIDEO_OV5675 is not set
# CONFIG_VIDEO_OV5695 is not set
# CONFIG_VIDEO_OV7251 is not set
# CONFIG_VIDEO_OV772X is not set
# CONFIG_VIDEO_OV7640 is not set
# CONFIG_VIDEO_OV7670 is not set
# CONFIG_VIDEO_OV7740 is not set
# CONFIG_VIDEO_OV8856 is not set
# CONFIG_VIDEO_OV8865 is not set
# CONFIG_VIDEO_OV9640 is not set
# CONFIG_VIDEO_OV9650 is not set
# CONFIG_VIDEO_OV9734 is not set
# CONFIG_VIDEO_OV13858 is not set
# CONFIG_VIDEO_VS6624 is not set
# CONFIG_VIDEO_MT9M001 is not set
# CONFIG_VIDEO_MT9M032 is not set
# CONFIG_VIDEO_MT9M111 is not set
# CONFIG_VIDEO_MT9P031 is not set
# CONFIG_VIDEO_MT9T001 is not set
# CONFIG_VIDEO_MT9T112 is not set
# CONFIG_VIDEO_MT9V011 is not set
# CONFIG_VIDEO_MT9V032 is not set
# CONFIG_VIDEO_MT9V111 is not set
# CONFIG_VIDEO_SR030PC30 is not set
# CONFIG_VIDEO_NOON010PC30 is not set
# CONFIG_VIDEO_M5MOLS is not set
# CONFIG_VIDEO_RDACM20 is not set
# CONFIG_VIDEO_RDACM21 is not set
# CONFIG_VIDEO_RJ54N1 is not set
# CONFIG_VIDEO_S5K6AA is not set
# CONFIG_VIDEO_S5K6A3 is not set
# CONFIG_VIDEO_S5K4ECGX is not set
# CONFIG_VIDEO_S5K5BAF is not set
# CONFIG_VIDEO_CCS is not set
# CONFIG_VIDEO_ET8EK8 is not set
# CONFIG_VIDEO_S5C73M3 is not set
# end of Camera sensor devices

#
# Lens drivers
#
# CONFIG_VIDEO_AD5820 is not set
# CONFIG_VIDEO_AK7375 is not set
# CONFIG_VIDEO_DW9714 is not set
# CONFIG_VIDEO_DW9768 is not set
# CONFIG_VIDEO_DW9807_VCM is not set
# end of Lens drivers

#
# Flash devices
#
# CONFIG_VIDEO_ADP1653 is not set
# CONFIG_VIDEO_LM3560 is not set
# CONFIG_VIDEO_LM3646 is not set
# end of Flash devices

#
# SPI helper chips
#
# CONFIG_VIDEO_GS1662 is not set
# end of SPI helper chips

#
# Media SPI Adapters
#
CONFIG_CXD2880_SPI_DRV=m
# end of Media SPI Adapters

CONFIG_MEDIA_TUNER=m

#
# Customize TV tuners
#
CONFIG_MEDIA_TUNER_SIMPLE=m
CONFIG_MEDIA_TUNER_TDA18250=m
CONFIG_MEDIA_TUNER_TDA8290=m
CONFIG_MEDIA_TUNER_TDA827X=m
CONFIG_MEDIA_TUNER_TDA18271=m
CONFIG_MEDIA_TUNER_TDA9887=m
CONFIG_MEDIA_TUNER_TEA5761=m
CONFIG_MEDIA_TUNER_TEA5767=m
CONFIG_MEDIA_TUNER_MSI001=m
CONFIG_MEDIA_TUNER_MT20XX=m
CONFIG_MEDIA_TUNER_MT2060=m
CONFIG_MEDIA_TUNER_MT2063=m
CONFIG_MEDIA_TUNER_MT2266=m
CONFIG_MEDIA_TUNER_MT2131=m
CONFIG_MEDIA_TUNER_QT1010=m
CONFIG_MEDIA_TUNER_XC2028=m
CONFIG_MEDIA_TUNER_XC5000=m
CONFIG_MEDIA_TUNER_XC4000=m
CONFIG_MEDIA_TUNER_MXL5005S=m
CONFIG_MEDIA_TUNER_MXL5007T=m
CONFIG_MEDIA_TUNER_MC44S803=m
CONFIG_MEDIA_TUNER_MAX2165=m
CONFIG_MEDIA_TUNER_TDA18218=m
CONFIG_MEDIA_TUNER_FC0011=m
CONFIG_MEDIA_TUNER_FC0012=m
CONFIG_MEDIA_TUNER_FC0013=m
CONFIG_MEDIA_TUNER_TDA18212=m
CONFIG_MEDIA_TUNER_E4000=m
CONFIG_MEDIA_TUNER_FC2580=m
CONFIG_MEDIA_TUNER_M88RS6000T=m
CONFIG_MEDIA_TUNER_TUA9001=m
CONFIG_MEDIA_TUNER_SI2157=m
CONFIG_MEDIA_TUNER_IT913X=m
CONFIG_MEDIA_TUNER_R820T=m
CONFIG_MEDIA_TUNER_MXL301RF=m
CONFIG_MEDIA_TUNER_QM1D1C0042=m
CONFIG_MEDIA_TUNER_QM1D1B0004=m
# end of Customize TV tuners

#
# Customise DVB Frontends
#

#
# Multistandard (satellite) frontends
#
CONFIG_DVB_STB0899=m
CONFIG_DVB_STB6100=m
CONFIG_DVB_STV090x=m
CONFIG_DVB_STV0910=m
CONFIG_DVB_STV6110x=m
CONFIG_DVB_STV6111=m
CONFIG_DVB_MXL5XX=m
CONFIG_DVB_M88DS3103=m

#
# Multistandard (cable + terrestrial) frontends
#
CONFIG_DVB_DRXK=m
CONFIG_DVB_TDA18271C2DD=m
CONFIG_DVB_SI2165=m
CONFIG_DVB_MN88472=m
CONFIG_DVB_MN88473=m

#
# DVB-S (satellite) frontends
#
CONFIG_DVB_CX24110=m
CONFIG_DVB_CX24123=m
CONFIG_DVB_MT312=m
CONFIG_DVB_ZL10036=m
CONFIG_DVB_ZL10039=m
CONFIG_DVB_S5H1420=m
CONFIG_DVB_STV0288=m
CONFIG_DVB_STB6000=m
CONFIG_DVB_STV0299=m
CONFIG_DVB_STV6110=m
CONFIG_DVB_STV0900=m
CONFIG_DVB_TDA8083=m
CONFIG_DVB_TDA10086=m
CONFIG_DVB_TDA8261=m
CONFIG_DVB_VES1X93=m
CONFIG_DVB_TUNER_ITD1000=m
CONFIG_DVB_TUNER_CX24113=m
CONFIG_DVB_TDA826X=m
CONFIG_DVB_TUA6100=m
CONFIG_DVB_CX24116=m
CONFIG_DVB_CX24117=m
CONFIG_DVB_CX24120=m
CONFIG_DVB_SI21XX=m
CONFIG_DVB_TS2020=m
CONFIG_DVB_DS3000=m
CONFIG_DVB_MB86A16=m
CONFIG_DVB_TDA10071=m

#
# DVB-T (terrestrial) frontends
#
CONFIG_DVB_SP887X=m
CONFIG_DVB_CX22700=m
CONFIG_DVB_CX22702=m
CONFIG_DVB_S5H1432=m
CONFIG_DVB_DRXD=m
CONFIG_DVB_L64781=m
CONFIG_DVB_TDA1004X=m
CONFIG_DVB_NXT6000=m
CONFIG_DVB_MT352=m
CONFIG_DVB_ZL10353=m
CONFIG_DVB_DIB3000MB=m
CONFIG_DVB_DIB3000MC=m
CONFIG_DVB_DIB7000M=m
CONFIG_DVB_DIB7000P=m
CONFIG_DVB_DIB9000=m
CONFIG_DVB_TDA10048=m
CONFIG_DVB_AF9013=m
CONFIG_DVB_EC100=m
CONFIG_DVB_STV0367=m
CONFIG_DVB_CXD2820R=m
CONFIG_DVB_CXD2841ER=m
CONFIG_DVB_RTL2830=m
CONFIG_DVB_RTL2832=m
CONFIG_DVB_RTL2832_SDR=m
CONFIG_DVB_SI2168=m
CONFIG_DVB_ZD1301_DEMOD=m
CONFIG_DVB_CXD2880=m

#
# DVB-C (cable) frontends
#
CONFIG_DVB_VES1820=m
CONFIG_DVB_TDA10021=m
CONFIG_DVB_TDA10023=m
CONFIG_DVB_STV0297=m

#
# ATSC (North American/Korean Terrestrial/Cable DTV) frontends
#
CONFIG_DVB_NXT200X=m
CONFIG_DVB_OR51211=m
CONFIG_DVB_OR51132=m
CONFIG_DVB_BCM3510=m
CONFIG_DVB_LGDT330X=m
CONFIG_DVB_LGDT3305=m
CONFIG_DVB_LGDT3306A=m
CONFIG_DVB_LG2160=m
CONFIG_DVB_S5H1409=m
CONFIG_DVB_AU8522=m
CONFIG_DVB_AU8522_DTV=m
CONFIG_DVB_AU8522_V4L=m
CONFIG_DVB_S5H1411=m
CONFIG_DVB_MXL692=m

#
# ISDB-T (terrestrial) frontends
#
CONFIG_DVB_S921=m
CONFIG_DVB_DIB8000=m
CONFIG_DVB_MB86A20S=m

#
# ISDB-S (satellite) & ISDB-T (terrestrial) frontends
#
CONFIG_DVB_TC90522=m
CONFIG_DVB_MN88443X=m

#
# Digital terrestrial only tuners/PLL
#
CONFIG_DVB_PLL=m
CONFIG_DVB_TUNER_DIB0070=m
CONFIG_DVB_TUNER_DIB0090=m

#
# SEC control devices for DVB-S
#
CONFIG_DVB_DRX39XYJ=m
CONFIG_DVB_LNBH25=m
CONFIG_DVB_LNBH29=m
CONFIG_DVB_LNBP21=m
CONFIG_DVB_LNBP22=m
CONFIG_DVB_ISL6405=m
CONFIG_DVB_ISL6421=m
CONFIG_DVB_ISL6423=m
CONFIG_DVB_A8293=m
CONFIG_DVB_LGS8GL5=m
CONFIG_DVB_LGS8GXX=m
CONFIG_DVB_ATBM8830=m
CONFIG_DVB_TDA665x=m
CONFIG_DVB_IX2505V=m
CONFIG_DVB_M88RS2000=m
CONFIG_DVB_AF9033=m
CONFIG_DVB_HORUS3A=m
CONFIG_DVB_ASCOT2E=m
CONFIG_DVB_HELENE=m

#
# Common Interface (EN50221) controller drivers
#
CONFIG_DVB_CXD2099=m
CONFIG_DVB_SP2=m
# end of Customise DVB Frontends

#
# Tools to develop new frontends
#
# CONFIG_DVB_DUMMY_FE is not set
# end of Media ancillary drivers

#
# Graphics support
#
# CONFIG_AGP is not set
CONFIG_INTEL_GTT=m
CONFIG_VGA_ARB=y
CONFIG_VGA_ARB_MAX_GPUS=64
CONFIG_VGA_SWITCHEROO=y
CONFIG_DRM=m
CONFIG_DRM_MIPI_DSI=y
CONFIG_DRM_DP_AUX_CHARDEV=y
# CONFIG_DRM_DEBUG_SELFTEST is not set
CONFIG_DRM_KMS_HELPER=m
CONFIG_DRM_FBDEV_EMULATION=y
CONFIG_DRM_FBDEV_OVERALLOC=100
CONFIG_DRM_LOAD_EDID_FIRMWARE=y
# CONFIG_DRM_DP_CEC is not set
CONFIG_DRM_TTM=m
CONFIG_DRM_VRAM_HELPER=m
CONFIG_DRM_TTM_HELPER=m
CONFIG_DRM_GEM_SHMEM_HELPER=y

#
# I2C encoder or helper chips
#
CONFIG_DRM_I2C_CH7006=m
CONFIG_DRM_I2C_SIL164=m
# CONFIG_DRM_I2C_NXP_TDA998X is not set
# CONFIG_DRM_I2C_NXP_TDA9950 is not set
# end of I2C encoder or helper chips

#
# ARM devices
#
# end of ARM devices

# CONFIG_DRM_RADEON is not set
# CONFIG_DRM_AMDGPU is not set
# CONFIG_DRM_NOUVEAU is not set
CONFIG_DRM_I915=m
CONFIG_DRM_I915_FORCE_PROBE=""
CONFIG_DRM_I915_CAPTURE_ERROR=y
CONFIG_DRM_I915_COMPRESS_ERROR=y
CONFIG_DRM_I915_USERPTR=y
# CONFIG_DRM_I915_GVT is not set
CONFIG_DRM_I915_REQUEST_TIMEOUT=20000
CONFIG_DRM_I915_FENCE_TIMEOUT=10000
CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND=250
CONFIG_DRM_I915_HEARTBEAT_INTERVAL=2500
CONFIG_DRM_I915_PREEMPT_TIMEOUT=640
CONFIG_DRM_I915_MAX_REQUEST_BUSYWAIT=8000
CONFIG_DRM_I915_STOP_TIMEOUT=100
CONFIG_DRM_I915_TIMESLICE_DURATION=1
# CONFIG_DRM_VGEM is not set
# CONFIG_DRM_VKMS is not set
# CONFIG_DRM_VMWGFX is not set
CONFIG_DRM_GMA500=m
# CONFIG_DRM_UDL is not set
CONFIG_DRM_AST=m
CONFIG_DRM_MGAG200=m
CONFIG_DRM_QXL=m
CONFIG_DRM_VIRTIO_GPU=m
CONFIG_DRM_PANEL=y

#
# Display Panels
#
# CONFIG_DRM_PANEL_RASPBERRYPI_TOUCHSCREEN is not set
# CONFIG_DRM_PANEL_WIDECHIPS_WS2401 is not set
# end of Display Panels

CONFIG_DRM_BRIDGE=y
CONFIG_DRM_PANEL_BRIDGE=y

#
# Display Interface Bridges
#
# CONFIG_DRM_ANALOGIX_ANX78XX is not set
# end of Display Interface Bridges

# CONFIG_DRM_ETNAVIV is not set
CONFIG_DRM_BOCHS=m
CONFIG_DRM_CIRRUS_QEMU=m
# CONFIG_DRM_GM12U320 is not set
# CONFIG_DRM_SIMPLEDRM is not set
# CONFIG_TINYDRM_HX8357D is not set
# CONFIG_TINYDRM_ILI9225 is not set
# CONFIG_TINYDRM_ILI9341 is not set
# CONFIG_TINYDRM_ILI9486 is not set
# CONFIG_TINYDRM_MI0283QT is not set
# CONFIG_TINYDRM_REPAPER is not set
# CONFIG_TINYDRM_ST7586 is not set
# CONFIG_TINYDRM_ST7735R is not set
# CONFIG_DRM_VBOXVIDEO is not set
# CONFIG_DRM_GUD is not set
# CONFIG_DRM_HYPERV is not set
# CONFIG_DRM_LEGACY is not set
CONFIG_DRM_PANEL_ORIENTATION_QUIRKS=y

#
# Frame buffer Devices
#
CONFIG_FB_CMDLINE=y
CONFIG_FB_NOTIFY=y
CONFIG_FB=y
# CONFIG_FIRMWARE_EDID is not set
CONFIG_FB_BOOT_VESA_SUPPORT=y
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
CONFIG_FB_SYS_FILLRECT=m
CONFIG_FB_SYS_COPYAREA=m
CONFIG_FB_SYS_IMAGEBLIT=m
# CONFIG_FB_FOREIGN_ENDIAN is not set
CONFIG_FB_SYS_FOPS=m
CONFIG_FB_DEFERRED_IO=y
# CONFIG_FB_MODE_HELPERS is not set
CONFIG_FB_TILEBLITTING=y

#
# Frame buffer hardware drivers
#
# CONFIG_FB_CIRRUS is not set
# CONFIG_FB_PM2 is not set
# CONFIG_FB_CYBER2000 is not set
# CONFIG_FB_ARC is not set
# CONFIG_FB_ASILIANT is not set
# CONFIG_FB_IMSTT is not set
# CONFIG_FB_VGA16 is not set
# CONFIG_FB_UVESA is not set
CONFIG_FB_VESA=y
CONFIG_FB_EFI=y
# CONFIG_FB_N411 is not set
# CONFIG_FB_HGA is not set
# CONFIG_FB_OPENCORES is not set
# CONFIG_FB_S1D13XXX is not set
# CONFIG_FB_NVIDIA is not set
# CONFIG_FB_RIVA is not set
# CONFIG_FB_I740 is not set
# CONFIG_FB_LE80578 is not set
# CONFIG_FB_MATROX is not set
# CONFIG_FB_RADEON is not set
# CONFIG_FB_ATY128 is not set
# CONFIG_FB_ATY is not set
# CONFIG_FB_S3 is not set
# CONFIG_FB_SAVAGE is not set
# CONFIG_FB_SIS is not set
# CONFIG_FB_VIA is not set
# CONFIG_FB_NEOMAGIC is not set
# CONFIG_FB_KYRO is not set
# CONFIG_FB_3DFX is not set
# CONFIG_FB_VOODOO1 is not set
# CONFIG_FB_VT8623 is not set
# CONFIG_FB_TRIDENT is not set
# CONFIG_FB_ARK is not set
# CONFIG_FB_PM3 is not set
# CONFIG_FB_CARMINE is not set
# CONFIG_FB_SM501 is not set
# CONFIG_FB_SMSCUFX is not set
# CONFIG_FB_UDL is not set
# CONFIG_FB_IBM_GXT4500 is not set
# CONFIG_FB_VIRTUAL is not set
# CONFIG_FB_METRONOME is not set
# CONFIG_FB_MB862XX is not set
CONFIG_FB_HYPERV=m
# CONFIG_FB_SIMPLE is not set
# CONFIG_FB_SSD1307 is not set
# CONFIG_FB_SM712 is not set
# end of Frame buffer Devices

#
# Backlight & LCD device support
#
CONFIG_LCD_CLASS_DEVICE=m
# CONFIG_LCD_L4F00242T03 is not set
# CONFIG_LCD_LMS283GF05 is not set
# CONFIG_LCD_LTV350QV is not set
# CONFIG_LCD_ILI922X is not set
# CONFIG_LCD_ILI9320 is not set
# CONFIG_LCD_TDO24M is not set
# CONFIG_LCD_VGG2432A4 is not set
CONFIG_LCD_PLATFORM=m
# CONFIG_LCD_AMS369FG06 is not set
# CONFIG_LCD_LMS501KF03 is not set
# CONFIG_LCD_HX8357 is not set
# CONFIG_LCD_OTM3225A is not set
CONFIG_BACKLIGHT_CLASS_DEVICE=y
# CONFIG_BACKLIGHT_KTD253 is not set
# CONFIG_BACKLIGHT_PWM is not set
CONFIG_BACKLIGHT_APPLE=m
# CONFIG_BACKLIGHT_QCOM_WLED is not set
# CONFIG_BACKLIGHT_SAHARA is not set
# CONFIG_BACKLIGHT_ADP8860 is not set
# CONFIG_BACKLIGHT_ADP8870 is not set
# CONFIG_BACKLIGHT_LM3630A is not set
# CONFIG_BACKLIGHT_LM3639 is not set
CONFIG_BACKLIGHT_LP855X=m
# CONFIG_BACKLIGHT_GPIO is not set
# CONFIG_BACKLIGHT_LV5207LP is not set
# CONFIG_BACKLIGHT_BD6107 is not set
# CONFIG_BACKLIGHT_ARCXCNN is not set
# end of Backlight & LCD device support

CONFIG_HDMI=y

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
CONFIG_DUMMY_CONSOLE=y
CONFIG_DUMMY_CONSOLE_COLUMNS=80
CONFIG_DUMMY_CONSOLE_ROWS=25
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y
# CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER is not set
# end of Console display driver support

CONFIG_LOGO=y
# CONFIG_LOGO_LINUX_MONO is not set
# CONFIG_LOGO_LINUX_VGA16 is not set
CONFIG_LOGO_LINUX_CLUT224=y
# end of Graphics support

# CONFIG_SOUND is not set

#
# HID support
#
CONFIG_HID=y
CONFIG_HID_BATTERY_STRENGTH=y
CONFIG_HIDRAW=y
CONFIG_UHID=m
CONFIG_HID_GENERIC=y

#
# Special HID drivers
#
CONFIG_HID_A4TECH=m
# CONFIG_HID_ACCUTOUCH is not set
CONFIG_HID_ACRUX=m
# CONFIG_HID_ACRUX_FF is not set
CONFIG_HID_APPLE=m
# CONFIG_HID_APPLEIR is not set
CONFIG_HID_ASUS=m
CONFIG_HID_AUREAL=m
CONFIG_HID_BELKIN=m
# CONFIG_HID_BETOP_FF is not set
# CONFIG_HID_BIGBEN_FF is not set
CONFIG_HID_CHERRY=m
CONFIG_HID_CHICONY=m
# CONFIG_HID_CORSAIR is not set
# CONFIG_HID_COUGAR is not set
# CONFIG_HID_MACALLY is not set
CONFIG_HID_CMEDIA=m
# CONFIG_HID_CP2112 is not set
# CONFIG_HID_CREATIVE_SB0540 is not set
CONFIG_HID_CYPRESS=m
CONFIG_HID_DRAGONRISE=m
# CONFIG_DRAGONRISE_FF is not set
# CONFIG_HID_EMS_FF is not set
# CONFIG_HID_ELAN is not set
CONFIG_HID_ELECOM=m
# CONFIG_HID_ELO is not set
CONFIG_HID_EZKEY=m
# CONFIG_HID_FT260 is not set
CONFIG_HID_GEMBIRD=m
CONFIG_HID_GFRM=m
# CONFIG_HID_GLORIOUS is not set
# CONFIG_HID_HOLTEK is not set
# CONFIG_HID_VIVALDI is not set
# CONFIG_HID_GT683R is not set
CONFIG_HID_KEYTOUCH=m
CONFIG_HID_KYE=m
# CONFIG_HID_UCLOGIC is not set
CONFIG_HID_WALTOP=m
# CONFIG_HID_VIEWSONIC is not set
CONFIG_HID_GYRATION=m
CONFIG_HID_ICADE=m
CONFIG_HID_ITE=m
CONFIG_HID_JABRA=m
CONFIG_HID_TWINHAN=m
CONFIG_HID_KENSINGTON=m
CONFIG_HID_LCPOWER=m
CONFIG_HID_LED=m
CONFIG_HID_LENOVO=m
CONFIG_HID_LOGITECH=m
CONFIG_HID_LOGITECH_DJ=m
CONFIG_HID_LOGITECH_HIDPP=m
# CONFIG_LOGITECH_FF is not set
# CONFIG_LOGIRUMBLEPAD2_FF is not set
# CONFIG_LOGIG940_FF is not set
# CONFIG_LOGIWHEELS_FF is not set
CONFIG_HID_MAGICMOUSE=y
# CONFIG_HID_MALTRON is not set
# CONFIG_HID_MAYFLASH is not set
# CONFIG_HID_REDRAGON is not set
CONFIG_HID_MICROSOFT=m
CONFIG_HID_MONTEREY=m
CONFIG_HID_MULTITOUCH=m
CONFIG_HID_NTI=m
# CONFIG_HID_NTRIG is not set
CONFIG_HID_ORTEK=m
CONFIG_HID_PANTHERLORD=m
# CONFIG_PANTHERLORD_FF is not set
# CONFIG_HID_PENMOUNT is not set
CONFIG_HID_PETALYNX=m
CONFIG_HID_PICOLCD=m
CONFIG_HID_PICOLCD_FB=y
CONFIG_HID_PICOLCD_BACKLIGHT=y
CONFIG_HID_PICOLCD_LCD=y
CONFIG_HID_PICOLCD_LEDS=y
CONFIG_HID_PICOLCD_CIR=y
CONFIG_HID_PLANTRONICS=m
# CONFIG_HID_PLAYSTATION is not set
CONFIG_HID_PRIMAX=m
# CONFIG_HID_RETRODE is not set
# CONFIG_HID_ROCCAT is not set
CONFIG_HID_SAITEK=m
CONFIG_HID_SAMSUNG=m
# CONFIG_HID_SEMITEK is not set
# CONFIG_HID_SONY is not set
CONFIG_HID_SPEEDLINK=m
# CONFIG_HID_STEAM is not set
CONFIG_HID_STEELSERIES=m
CONFIG_HID_SUNPLUS=m
CONFIG_HID_RMI=m
CONFIG_HID_GREENASIA=m
# CONFIG_GREENASIA_FF is not set
CONFIG_HID_HYPERV_MOUSE=m
CONFIG_HID_SMARTJOYPLUS=m
# CONFIG_SMARTJOYPLUS_FF is not set
CONFIG_HID_TIVO=m
CONFIG_HID_TOPSEED=m
CONFIG_HID_THINGM=m
CONFIG_HID_THRUSTMASTER=m
# CONFIG_THRUSTMASTER_FF is not set
# CONFIG_HID_UDRAW_PS3 is not set
# CONFIG_HID_U2FZERO is not set
# CONFIG_HID_WACOM is not set
CONFIG_HID_WIIMOTE=m
CONFIG_HID_XINMO=m
CONFIG_HID_ZEROPLUS=m
# CONFIG_ZEROPLUS_FF is not set
CONFIG_HID_ZYDACRON=m
CONFIG_HID_SENSOR_HUB=y
CONFIG_HID_SENSOR_CUSTOM_SENSOR=m
CONFIG_HID_ALPS=m
# CONFIG_HID_MCP2221 is not set
# end of Special HID drivers

#
# USB HID support
#
CONFIG_USB_HID=y
# CONFIG_HID_PID is not set
# CONFIG_USB_HIDDEV is not set
# end of USB HID support

#
# I2C HID support
#
# CONFIG_I2C_HID_ACPI is not set
# end of I2C HID support

#
# Intel ISH HID support
#
CONFIG_INTEL_ISH_HID=m
# CONFIG_INTEL_ISH_FIRMWARE_DOWNLOADER is not set
# end of Intel ISH HID support

#
# AMD SFH HID Support
#
# CONFIG_AMD_SFH_HID is not set
# end of AMD SFH HID Support
# end of HID support

CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_USB_SUPPORT=y
CONFIG_USB_COMMON=y
# CONFIG_USB_LED_TRIG is not set
# CONFIG_USB_ULPI_BUS is not set
# CONFIG_USB_CONN_GPIO is not set
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB=y
CONFIG_USB_PCI=y
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y

#
# Miscellaneous USB options
#
CONFIG_USB_DEFAULT_PERSIST=y
# CONFIG_USB_FEW_INIT_RETRIES is not set
# CONFIG_USB_DYNAMIC_MINORS is not set
# CONFIG_USB_OTG is not set
# CONFIG_USB_OTG_PRODUCTLIST is not set
CONFIG_USB_LEDS_TRIGGER_USBPORT=y
CONFIG_USB_AUTOSUSPEND_DELAY=2
CONFIG_USB_MON=y

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
CONFIG_USB_XHCI_HCD=y
# CONFIG_USB_XHCI_DBGCAP is not set
CONFIG_USB_XHCI_PCI=y
# CONFIG_USB_XHCI_PCI_RENESAS is not set
# CONFIG_USB_XHCI_PLATFORM is not set
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
CONFIG_USB_EHCI_PCI=y
# CONFIG_USB_EHCI_FSL is not set
# CONFIG_USB_EHCI_HCD_PLATFORM is not set
# CONFIG_USB_OXU210HP_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_FOTG210_HCD is not set
# CONFIG_USB_MAX3421_HCD is not set
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_OHCI_HCD_PCI=y
# CONFIG_USB_OHCI_HCD_PLATFORM is not set
CONFIG_USB_UHCI_HCD=y
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_HCD_BCMA is not set
# CONFIG_USB_HCD_TEST_MODE is not set

#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
# CONFIG_USB_PRINTER is not set
# CONFIG_USB_WDM is not set
# CONFIG_USB_TMC is not set

#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#

#
# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=m
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_REALTEK is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_ONETOUCH is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
# CONFIG_USB_STORAGE_ENE_UB6250 is not set
# CONFIG_USB_UAS is not set

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set
# CONFIG_USBIP_CORE is not set
# CONFIG_USB_CDNS_SUPPORT is not set
# CONFIG_USB_MUSB_HDRC is not set
# CONFIG_USB_DWC3 is not set
# CONFIG_USB_DWC2 is not set
# CONFIG_USB_CHIPIDEA is not set
# CONFIG_USB_ISP1760 is not set

#
# USB port drivers
#
# CONFIG_USB_USS720 is not set
CONFIG_USB_SERIAL=m
CONFIG_USB_SERIAL_GENERIC=y
# CONFIG_USB_SERIAL_SIMPLE is not set
# CONFIG_USB_SERIAL_AIRCABLE is not set
# CONFIG_USB_SERIAL_ARK3116 is not set
# CONFIG_USB_SERIAL_BELKIN is not set
# CONFIG_USB_SERIAL_CH341 is not set
# CONFIG_USB_SERIAL_WHITEHEAT is not set
# CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
# CONFIG_USB_SERIAL_CP210X is not set
# CONFIG_USB_SERIAL_CYPRESS_M8 is not set
# CONFIG_USB_SERIAL_EMPEG is not set
# CONFIG_USB_SERIAL_FTDI_SIO is not set
# CONFIG_USB_SERIAL_VISOR is not set
# CONFIG_USB_SERIAL_IPAQ is not set
# CONFIG_USB_SERIAL_IR is not set
# CONFIG_USB_SERIAL_EDGEPORT is not set
# CONFIG_USB_SERIAL_EDGEPORT_TI is not set
# CONFIG_USB_SERIAL_F81232 is not set
# CONFIG_USB_SERIAL_F8153X is not set
# CONFIG_USB_SERIAL_GARMIN is not set
# CONFIG_USB_SERIAL_IPW is not set
# CONFIG_USB_SERIAL_IUU is not set
# CONFIG_USB_SERIAL_KEYSPAN_PDA is not set
# CONFIG_USB_SERIAL_KEYSPAN is not set
# CONFIG_USB_SERIAL_KLSI is not set
# CONFIG_USB_SERIAL_KOBIL_SCT is not set
# CONFIG_USB_SERIAL_MCT_U232 is not set
# CONFIG_USB_SERIAL_METRO is not set
# CONFIG_USB_SERIAL_MOS7720 is not set
# CONFIG_USB_SERIAL_MOS7840 is not set
# CONFIG_USB_SERIAL_MXUPORT is not set
# CONFIG_USB_SERIAL_NAVMAN is not set
# CONFIG_USB_SERIAL_PL2303 is not set
# CONFIG_USB_SERIAL_OTI6858 is not set
# CONFIG_USB_SERIAL_QCAUX is not set
# CONFIG_USB_SERIAL_QUALCOMM is not set
# CONFIG_USB_SERIAL_SPCP8X5 is not set
# CONFIG_USB_SERIAL_SAFE is not set
# CONFIG_USB_SERIAL_SIERRAWIRELESS is not set
# CONFIG_USB_SERIAL_SYMBOL is not set
# CONFIG_USB_SERIAL_TI is not set
# CONFIG_USB_SERIAL_CYBERJACK is not set
# CONFIG_USB_SERIAL_OPTION is not set
# CONFIG_USB_SERIAL_OMNINET is not set
# CONFIG_USB_SERIAL_OPTICON is not set
# CONFIG_USB_SERIAL_XSENS_MT is not set
# CONFIG_USB_SERIAL_WISHBONE is not set
# CONFIG_USB_SERIAL_SSU100 is not set
# CONFIG_USB_SERIAL_QT2 is not set
# CONFIG_USB_SERIAL_UPD78F0730 is not set
# CONFIG_USB_SERIAL_XR is not set
CONFIG_USB_SERIAL_DEBUG=m

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_APPLE_MFI_FASTCHARGE is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_EHSET_TEST_FIXTURE is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_YUREX is not set
# CONFIG_USB_EZUSB_FX2 is not set
# CONFIG_USB_HUB_USB251XB is not set
# CONFIG_USB_HSIC_USB3503 is not set
# CONFIG_USB_HSIC_USB4604 is not set
# CONFIG_USB_LINK_LAYER_TEST is not set
# CONFIG_USB_CHAOSKEY is not set
# CONFIG_USB_ATM is not set

#
# USB Physical Layer drivers
#
# CONFIG_NOP_USB_XCEIV is not set
# CONFIG_USB_GPIO_VBUS is not set
# CONFIG_USB_ISP1301 is not set
# end of USB Physical Layer drivers

# CONFIG_USB_GADGET is not set
CONFIG_TYPEC=y
# CONFIG_TYPEC_TCPM is not set
CONFIG_TYPEC_UCSI=y
# CONFIG_UCSI_CCG is not set
CONFIG_UCSI_ACPI=y
# CONFIG_TYPEC_TPS6598X is not set
# CONFIG_TYPEC_STUSB160X is not set

#
# USB Type-C Multiplexer/DeMultiplexer Switch support
#
# CONFIG_TYPEC_MUX_PI3USB30532 is not set
# end of USB Type-C Multiplexer/DeMultiplexer Switch support

#
# USB Type-C Alternate Mode drivers
#
# CONFIG_TYPEC_DP_ALTMODE is not set
# end of USB Type-C Alternate Mode drivers

# CONFIG_USB_ROLE_SWITCH is not set
CONFIG_MMC=m
CONFIG_MMC_BLOCK=m
CONFIG_MMC_BLOCK_MINORS=8
CONFIG_SDIO_UART=m
# CONFIG_MMC_TEST is not set

#
# MMC/SD/SDIO Host Controller Drivers
#
# CONFIG_MMC_DEBUG is not set
CONFIG_MMC_SDHCI=m
CONFIG_MMC_SDHCI_IO_ACCESSORS=y
CONFIG_MMC_SDHCI_PCI=m
CONFIG_MMC_RICOH_MMC=y
CONFIG_MMC_SDHCI_ACPI=m
CONFIG_MMC_SDHCI_PLTFM=m
# CONFIG_MMC_SDHCI_F_SDH30 is not set
# CONFIG_MMC_WBSD is not set
# CONFIG_MMC_TIFM_SD is not set
# CONFIG_MMC_SPI is not set
# CONFIG_MMC_CB710 is not set
# CONFIG_MMC_VIA_SDMMC is not set
# CONFIG_MMC_VUB300 is not set
# CONFIG_MMC_USHC is not set
# CONFIG_MMC_USDHI6ROL0 is not set
# CONFIG_MMC_REALTEK_PCI is not set
CONFIG_MMC_CQHCI=m
# CONFIG_MMC_HSQ is not set
# CONFIG_MMC_TOSHIBA_PCI is not set
# CONFIG_MMC_MTK is not set
# CONFIG_MMC_SDHCI_XENON is not set
# CONFIG_MEMSTICK is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y
# CONFIG_LEDS_CLASS_FLASH is not set
# CONFIG_LEDS_CLASS_MULTICOLOR is not set
# CONFIG_LEDS_BRIGHTNESS_HW_CHANGED is not set

#
# LED drivers
#
# CONFIG_LEDS_APU is not set
CONFIG_LEDS_LM3530=m
# CONFIG_LEDS_LM3532 is not set
# CONFIG_LEDS_LM3642 is not set
# CONFIG_LEDS_PCA9532 is not set
# CONFIG_LEDS_GPIO is not set
CONFIG_LEDS_LP3944=m
# CONFIG_LEDS_LP3952 is not set
# CONFIG_LEDS_LP50XX is not set
CONFIG_LEDS_CLEVO_MAIL=m
# CONFIG_LEDS_PCA955X is not set
# CONFIG_LEDS_PCA963X is not set
# CONFIG_LEDS_DAC124S085 is not set
# CONFIG_LEDS_PWM is not set
# CONFIG_LEDS_BD2802 is not set
CONFIG_LEDS_INTEL_SS4200=m
CONFIG_LEDS_LT3593=m
# CONFIG_LEDS_TCA6507 is not set
# CONFIG_LEDS_TLC591XX is not set
# CONFIG_LEDS_LM355x is not set

#
# LED driver for blink(1) USB RGB LED is under Special HID drivers (HID_THINGM)
#
CONFIG_LEDS_BLINKM=m
CONFIG_LEDS_MLXCPLD=m
# CONFIG_LEDS_MLXREG is not set
# CONFIG_LEDS_USER is not set
# CONFIG_LEDS_NIC78BX is not set
# CONFIG_LEDS_TI_LMU_COMMON is not set

#
# Flash and Torch LED drivers
#

#
# LED Triggers
#
CONFIG_LEDS_TRIGGERS=y
CONFIG_LEDS_TRIGGER_TIMER=m
CONFIG_LEDS_TRIGGER_ONESHOT=m
# CONFIG_LEDS_TRIGGER_DISK is not set
CONFIG_LEDS_TRIGGER_HEARTBEAT=m
CONFIG_LEDS_TRIGGER_BACKLIGHT=m
# CONFIG_LEDS_TRIGGER_CPU is not set
# CONFIG_LEDS_TRIGGER_ACTIVITY is not set
CONFIG_LEDS_TRIGGER_GPIO=m
CONFIG_LEDS_TRIGGER_DEFAULT_ON=m

#
# iptables trigger is under Netfilter config (LED target)
#
CONFIG_LEDS_TRIGGER_TRANSIENT=m
CONFIG_LEDS_TRIGGER_CAMERA=m
# CONFIG_LEDS_TRIGGER_PANIC is not set
# CONFIG_LEDS_TRIGGER_NETDEV is not set
# CONFIG_LEDS_TRIGGER_PATTERN is not set
CONFIG_LEDS_TRIGGER_AUDIO=m
# CONFIG_LEDS_TRIGGER_TTY is not set
# CONFIG_ACCESSIBILITY is not set
CONFIG_INFINIBAND=m
CONFIG_INFINIBAND_USER_MAD=m
CONFIG_INFINIBAND_USER_ACCESS=m
CONFIG_INFINIBAND_USER_MEM=y
CONFIG_INFINIBAND_ON_DEMAND_PAGING=y
CONFIG_INFINIBAND_ADDR_TRANS=y
CONFIG_INFINIBAND_ADDR_TRANS_CONFIGFS=y
CONFIG_INFINIBAND_VIRT_DMA=y
# CONFIG_INFINIBAND_MTHCA is not set
# CONFIG_INFINIBAND_EFA is not set
# CONFIG_MLX4_INFINIBAND is not set
# CONFIG_INFINIBAND_OCRDMA is not set
# CONFIG_INFINIBAND_USNIC is not set
# CONFIG_INFINIBAND_RDMAVT is not set
CONFIG_RDMA_RXE=m
CONFIG_RDMA_SIW=m
CONFIG_INFINIBAND_IPOIB=m
# CONFIG_INFINIBAND_IPOIB_CM is not set
CONFIG_INFINIBAND_IPOIB_DEBUG=y
# CONFIG_INFINIBAND_IPOIB_DEBUG_DATA is not set
CONFIG_INFINIBAND_SRP=m
CONFIG_INFINIBAND_SRPT=m
# CONFIG_INFINIBAND_ISER is not set
# CONFIG_INFINIBAND_ISERT is not set
# CONFIG_INFINIBAND_RTRS_CLIENT is not set
# CONFIG_INFINIBAND_RTRS_SERVER is not set
# CONFIG_INFINIBAND_OPA_VNIC is not set
CONFIG_EDAC_ATOMIC_SCRUB=y
CONFIG_EDAC_SUPPORT=y
CONFIG_EDAC=y
CONFIG_EDAC_LEGACY_SYSFS=y
# CONFIG_EDAC_DEBUG is not set
CONFIG_EDAC_DECODE_MCE=m
CONFIG_EDAC_GHES=y
CONFIG_EDAC_AMD64=m
CONFIG_EDAC_E752X=m
CONFIG_EDAC_I82975X=m
CONFIG_EDAC_I3000=m
CONFIG_EDAC_I3200=m
CONFIG_EDAC_IE31200=m
CONFIG_EDAC_X38=m
CONFIG_EDAC_I5400=m
CONFIG_EDAC_I7CORE=m
CONFIG_EDAC_I5000=m
CONFIG_EDAC_I5100=m
CONFIG_EDAC_I7300=m
CONFIG_EDAC_SBRIDGE=m
CONFIG_EDAC_SKX=m
# CONFIG_EDAC_I10NM is not set
CONFIG_EDAC_PND2=m
# CONFIG_EDAC_IGEN6 is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_MC146818_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_SYSTOHC is not set
# CONFIG_RTC_DEBUG is not set
CONFIG_RTC_NVMEM=y

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_ABB5ZES3 is not set
# CONFIG_RTC_DRV_ABEOZ9 is not set
# CONFIG_RTC_DRV_ABX80X is not set
CONFIG_RTC_DRV_DS1307=m
# CONFIG_RTC_DRV_DS1307_CENTURY is not set
CONFIG_RTC_DRV_DS1374=m
# CONFIG_RTC_DRV_DS1374_WDT is not set
CONFIG_RTC_DRV_DS1672=m
CONFIG_RTC_DRV_MAX6900=m
CONFIG_RTC_DRV_RS5C372=m
CONFIG_RTC_DRV_ISL1208=m
CONFIG_RTC_DRV_ISL12022=m
CONFIG_RTC_DRV_X1205=m
CONFIG_RTC_DRV_PCF8523=m
# CONFIG_RTC_DRV_PCF85063 is not set
# CONFIG_RTC_DRV_PCF85363 is not set
CONFIG_RTC_DRV_PCF8563=m
CONFIG_RTC_DRV_PCF8583=m
CONFIG_RTC_DRV_M41T80=m
CONFIG_RTC_DRV_M41T80_WDT=y
CONFIG_RTC_DRV_BQ32K=m
# CONFIG_RTC_DRV_S35390A is not set
CONFIG_RTC_DRV_FM3130=m
# CONFIG_RTC_DRV_RX8010 is not set
CONFIG_RTC_DRV_RX8581=m
CONFIG_RTC_DRV_RX8025=m
CONFIG_RTC_DRV_EM3027=m
# CONFIG_RTC_DRV_RV3028 is not set
# CONFIG_RTC_DRV_RV3032 is not set
# CONFIG_RTC_DRV_RV8803 is not set
# CONFIG_RTC_DRV_SD3078 is not set

#
# SPI RTC drivers
#
# CONFIG_RTC_DRV_M41T93 is not set
# CONFIG_RTC_DRV_M41T94 is not set
# CONFIG_RTC_DRV_DS1302 is not set
# CONFIG_RTC_DRV_DS1305 is not set
# CONFIG_RTC_DRV_DS1343 is not set
# CONFIG_RTC_DRV_DS1347 is not set
# CONFIG_RTC_DRV_DS1390 is not set
# CONFIG_RTC_DRV_MAX6916 is not set
# CONFIG_RTC_DRV_R9701 is not set
CONFIG_RTC_DRV_RX4581=m
# CONFIG_RTC_DRV_RS5C348 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
# CONFIG_RTC_DRV_PCF2123 is not set
# CONFIG_RTC_DRV_MCP795 is not set
CONFIG_RTC_I2C_AND_SPI=y

#
# SPI and I2C RTC drivers
#
CONFIG_RTC_DRV_DS3232=m
CONFIG_RTC_DRV_DS3232_HWMON=y
# CONFIG_RTC_DRV_PCF2127 is not set
CONFIG_RTC_DRV_RV3029C2=m
# CONFIG_RTC_DRV_RV3029_HWMON is not set
# CONFIG_RTC_DRV_RX6110 is not set

#
# Platform RTC drivers
#
CONFIG_RTC_DRV_CMOS=y
CONFIG_RTC_DRV_DS1286=m
CONFIG_RTC_DRV_DS1511=m
CONFIG_RTC_DRV_DS1553=m
# CONFIG_RTC_DRV_DS1685_FAMILY is not set
CONFIG_RTC_DRV_DS1742=m
CONFIG_RTC_DRV_DS2404=m
CONFIG_RTC_DRV_STK17TA8=m
# CONFIG_RTC_DRV_M48T86 is not set
CONFIG_RTC_DRV_M48T35=m
CONFIG_RTC_DRV_M48T59=m
CONFIG_RTC_DRV_MSM6242=m
CONFIG_RTC_DRV_BQ4802=m
CONFIG_RTC_DRV_RP5C01=m
CONFIG_RTC_DRV_V3020=m

#
# on-CPU RTC drivers
#
# CONFIG_RTC_DRV_FTRTC010 is not set

#
# HID Sensor RTC drivers
#
# CONFIG_RTC_DRV_GOLDFISH is not set
CONFIG_DMADEVICES=y
# CONFIG_DMADEVICES_DEBUG is not set

#
# DMA Devices
#
CONFIG_DMA_ENGINE=y
CONFIG_DMA_VIRTUAL_CHANNELS=y
CONFIG_DMA_ACPI=y
# CONFIG_ALTERA_MSGDMA is not set
CONFIG_INTEL_IDMA64=m
# CONFIG_INTEL_IDXD is not set
CONFIG_INTEL_IOATDMA=m
# CONFIG_PLX_DMA is not set
# CONFIG_QCOM_HIDMA_MGMT is not set
# CONFIG_QCOM_HIDMA is not set
CONFIG_DW_DMAC_CORE=y
CONFIG_DW_DMAC=m
CONFIG_DW_DMAC_PCI=y
# CONFIG_DW_EDMA is not set
# CONFIG_DW_EDMA_PCIE is not set
CONFIG_HSU_DMA=y
# CONFIG_SF_PDMA is not set
# CONFIG_INTEL_LDMA is not set

#
# DMA Clients
#
CONFIG_ASYNC_TX_DMA=y
CONFIG_DMATEST=m
CONFIG_DMA_ENGINE_RAID=y

#
# DMABUF options
#
CONFIG_SYNC_FILE=y
# CONFIG_SW_SYNC is not set
# CONFIG_UDMABUF is not set
# CONFIG_DMABUF_MOVE_NOTIFY is not set
# CONFIG_DMABUF_DEBUG is not set
# CONFIG_DMABUF_SELFTESTS is not set
# CONFIG_DMABUF_HEAPS is not set
# CONFIG_DMABUF_SYSFS_STATS is not set
# end of DMABUF options

CONFIG_DCA=m
# CONFIG_AUXDISPLAY is not set
# CONFIG_PANEL is not set
CONFIG_UIO=m
CONFIG_UIO_CIF=m
CONFIG_UIO_PDRV_GENIRQ=m
# CONFIG_UIO_DMEM_GENIRQ is not set
CONFIG_UIO_AEC=m
CONFIG_UIO_SERCOS3=m
CONFIG_UIO_PCI_GENERIC=m
# CONFIG_UIO_NETX is not set
# CONFIG_UIO_PRUSS is not set
# CONFIG_UIO_MF624 is not set
CONFIG_UIO_HV_GENERIC=m
CONFIG_VFIO=m
CONFIG_VFIO_IOMMU_TYPE1=m
CONFIG_VFIO_VIRQFD=m
CONFIG_VFIO_NOIOMMU=y
CONFIG_VFIO_PCI_CORE=m
CONFIG_VFIO_PCI_MMAP=y
CONFIG_VFIO_PCI_INTX=y
CONFIG_VFIO_PCI=m
# CONFIG_VFIO_PCI_VGA is not set
# CONFIG_VFIO_PCI_IGD is not set
CONFIG_VFIO_MDEV=m
CONFIG_IRQ_BYPASS_MANAGER=m
# CONFIG_VIRT_DRIVERS is not set
CONFIG_VIRTIO=y
CONFIG_VIRTIO_PCI_LIB=y
CONFIG_VIRTIO_MENU=y
CONFIG_VIRTIO_PCI=y
CONFIG_VIRTIO_PCI_LEGACY=y
# CONFIG_VIRTIO_PMEM is not set
CONFIG_VIRTIO_BALLOON=m
CONFIG_VIRTIO_MEM=m
CONFIG_VIRTIO_INPUT=m
# CONFIG_VIRTIO_MMIO is not set
CONFIG_VIRTIO_DMA_SHARED_BUFFER=m
# CONFIG_VDPA is not set
CONFIG_VHOST_IOTLB=m
CONFIG_VHOST=m
CONFIG_VHOST_MENU=y
CONFIG_VHOST_NET=m
# CONFIG_VHOST_SCSI is not set
CONFIG_VHOST_VSOCK=m
# CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set

#
# Microsoft Hyper-V guest support
#
CONFIG_HYPERV=m
CONFIG_HYPERV_TIMER=y
CONFIG_HYPERV_UTILS=m
CONFIG_HYPERV_BALLOON=m
# end of Microsoft Hyper-V guest support

# CONFIG_GREYBUS is not set
# CONFIG_COMEDI is not set
# CONFIG_STAGING is not set
CONFIG_X86_PLATFORM_DEVICES=y
CONFIG_ACPI_WMI=m
CONFIG_WMI_BMOF=m
# CONFIG_HUAWEI_WMI is not set
# CONFIG_UV_SYSFS is not set
CONFIG_MXM_WMI=m
# CONFIG_PEAQ_WMI is not set
# CONFIG_XIAOMI_WMI is not set
# CONFIG_GIGABYTE_WMI is not set
CONFIG_ACERHDF=m
# CONFIG_ACER_WIRELESS is not set
CONFIG_ACER_WMI=m
# CONFIG_AMD_PMC is not set
# CONFIG_ADV_SWBUTTON is not set
CONFIG_APPLE_GMUX=m
CONFIG_ASUS_LAPTOP=m
# CONFIG_ASUS_WIRELESS is not set
CONFIG_ASUS_WMI=m
CONFIG_ASUS_NB_WMI=m
# CONFIG_MERAKI_MX100 is not set
CONFIG_EEEPC_LAPTOP=m
CONFIG_EEEPC_WMI=m
# CONFIG_X86_PLATFORM_DRIVERS_DELL is not set
CONFIG_AMILO_RFKILL=m
CONFIG_FUJITSU_LAPTOP=m
CONFIG_FUJITSU_TABLET=m
# CONFIG_GPD_POCKET_FAN is not set
CONFIG_HP_ACCEL=m
# CONFIG_WIRELESS_HOTKEY is not set
CONFIG_HP_WMI=m
# CONFIG_IBM_RTL is not set
CONFIG_IDEAPAD_LAPTOP=m
CONFIG_SENSORS_HDAPS=m
CONFIG_THINKPAD_ACPI=m
# CONFIG_THINKPAD_ACPI_DEBUGFACILITIES is not set
# CONFIG_THINKPAD_ACPI_DEBUG is not set
# CONFIG_THINKPAD_ACPI_UNSAFE_LEDS is not set
CONFIG_THINKPAD_ACPI_VIDEO=y
CONFIG_THINKPAD_ACPI_HOTKEY_POLL=y
# CONFIG_THINKPAD_LMI is not set
CONFIG_X86_PLATFORM_DRIVERS_INTEL=y
# CONFIG_INTEL_ATOMISP2_PM is not set
# CONFIG_INTEL_SAR_INT1092 is not set
CONFIG_INTEL_PMC_CORE=m

#
# Intel Speed Select Technology interface support
#
# CONFIG_INTEL_SPEED_SELECT_INTERFACE is not set
# end of Intel Speed Select Technology interface support

CONFIG_INTEL_WMI=y
# CONFIG_INTEL_WMI_SBL_FW_UPDATE is not set
CONFIG_INTEL_WMI_THUNDERBOLT=m
CONFIG_INTEL_HID_EVENT=m
CONFIG_INTEL_VBTN=m
# CONFIG_INTEL_INT0002_VGPIO is not set
CONFIG_INTEL_OAKTRAIL=m
# CONFIG_INTEL_PUNIT_IPC is not set
CONFIG_INTEL_RST=m
# CONFIG_INTEL_SMARTCONNECT is not set
CONFIG_INTEL_TURBO_MAX_3=y
# CONFIG_INTEL_UNCORE_FREQ_CONTROL is not set
CONFIG_MSI_LAPTOP=m
CONFIG_MSI_WMI=m
# CONFIG_PCENGINES_APU2 is not set
CONFIG_SAMSUNG_LAPTOP=m
CONFIG_SAMSUNG_Q10=m
CONFIG_TOSHIBA_BT_RFKILL=m
# CONFIG_TOSHIBA_HAPS is not set
# CONFIG_TOSHIBA_WMI is not set
CONFIG_ACPI_CMPC=m
CONFIG_COMPAL_LAPTOP=m
# CONFIG_LG_LAPTOP is not set
CONFIG_PANASONIC_LAPTOP=m
CONFIG_SONY_LAPTOP=m
CONFIG_SONYPI_COMPAT=y
# CONFIG_SYSTEM76_ACPI is not set
CONFIG_TOPSTAR_LAPTOP=m
# CONFIG_I2C_MULTI_INSTANTIATE is not set
CONFIG_MLX_PLATFORM=m
CONFIG_INTEL_IPS=m
# CONFIG_INTEL_SCU_PCI is not set
# CONFIG_INTEL_SCU_PLATFORM is not set
CONFIG_PMC_ATOM=y
# CONFIG_CHROME_PLATFORMS is not set
CONFIG_MELLANOX_PLATFORM=y
CONFIG_MLXREG_HOTPLUG=m
# CONFIG_MLXREG_IO is not set
CONFIG_SURFACE_PLATFORMS=y
# CONFIG_SURFACE3_WMI is not set
# CONFIG_SURFACE_3_POWER_OPREGION is not set
# CONFIG_SURFACE_GPE is not set
# CONFIG_SURFACE_HOTPLUG is not set
# CONFIG_SURFACE_PRO3_BUTTON is not set
CONFIG_HAVE_CLK=y
CONFIG_HAVE_CLK_PREPARE=y
CONFIG_COMMON_CLK=y

#
# Clock driver for ARM Reference designs
#
# CONFIG_ICST is not set
# CONFIG_CLK_SP810 is not set
# end of Clock driver for ARM Reference designs

# CONFIG_LMK04832 is not set
# CONFIG_COMMON_CLK_MAX9485 is not set
# CONFIG_COMMON_CLK_SI5341 is not set
# CONFIG_COMMON_CLK_SI5351 is not set
# CONFIG_COMMON_CLK_SI544 is not set
# CONFIG_COMMON_CLK_CDCE706 is not set
# CONFIG_COMMON_CLK_CS2000_CP is not set
# CONFIG_COMMON_CLK_PWM is not set
# CONFIG_XILINX_VCU is not set
CONFIG_HWSPINLOCK=y

#
# Clock Source drivers
#
CONFIG_CLKEVT_I8253=y
CONFIG_I8253_LOCK=y
CONFIG_CLKBLD_I8253=y
# end of Clock Source drivers

CONFIG_MAILBOX=y
CONFIG_PCC=y
# CONFIG_ALTERA_MBOX is not set
CONFIG_IOMMU_IOVA=y
CONFIG_IOASID=y
CONFIG_IOMMU_API=y
CONFIG_IOMMU_SUPPORT=y

#
# Generic IOMMU Pagetable Support
#
# end of Generic IOMMU Pagetable Support

# CONFIG_IOMMU_DEBUGFS is not set
# CONFIG_IOMMU_DEFAULT_DMA_STRICT is not set
CONFIG_IOMMU_DEFAULT_DMA_LAZY=y
# CONFIG_IOMMU_DEFAULT_PASSTHROUGH is not set
CONFIG_IOMMU_DMA=y
# CONFIG_AMD_IOMMU is not set
CONFIG_DMAR_TABLE=y
CONFIG_INTEL_IOMMU=y
# CONFIG_INTEL_IOMMU_SVM is not set
# CONFIG_INTEL_IOMMU_DEFAULT_ON is not set
CONFIG_INTEL_IOMMU_FLOPPY_WA=y
CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON=y
CONFIG_IRQ_REMAP=y
CONFIG_HYPERV_IOMMU=y
# CONFIG_VIRTIO_IOMMU is not set

#
# Remoteproc drivers
#
# CONFIG_REMOTEPROC is not set
# end of Remoteproc drivers

#
# Rpmsg drivers
#
# CONFIG_RPMSG_QCOM_GLINK_RPM is not set
# CONFIG_RPMSG_VIRTIO is not set
# end of Rpmsg drivers

# CONFIG_SOUNDWIRE is not set

#
# SOC (System On Chip) specific Drivers
#

#
# Amlogic SoC drivers
#
# end of Amlogic SoC drivers

#
# Broadcom SoC drivers
#
# end of Broadcom SoC drivers

#
# NXP/Freescale QorIQ SoC drivers
#
# end of NXP/Freescale QorIQ SoC drivers

#
# i.MX SoC drivers
#
# end of i.MX SoC drivers

#
# Enable LiteX SoC Builder specific drivers
#
# end of Enable LiteX SoC Builder specific drivers

#
# Qualcomm SoC drivers
#
# end of Qualcomm SoC drivers

# CONFIG_SOC_TI is not set

#
# Xilinx SoC drivers
#
# end of Xilinx SoC drivers
# end of SOC (System On Chip) specific Drivers

# CONFIG_PM_DEVFREQ is not set
# CONFIG_EXTCON is not set
# CONFIG_MEMORY is not set
# CONFIG_IIO is not set
CONFIG_NTB=m
# CONFIG_NTB_MSI is not set
# CONFIG_NTB_AMD is not set
# CONFIG_NTB_IDT is not set
# CONFIG_NTB_INTEL is not set
# CONFIG_NTB_EPF is not set
# CONFIG_NTB_SWITCHTEC is not set
# CONFIG_NTB_PINGPONG is not set
# CONFIG_NTB_TOOL is not set
# CONFIG_NTB_PERF is not set
# CONFIG_NTB_TRANSPORT is not set
# CONFIG_VME_BUS is not set
CONFIG_PWM=y
CONFIG_PWM_SYSFS=y
# CONFIG_PWM_DEBUG is not set
# CONFIG_PWM_DWC is not set
CONFIG_PWM_LPSS=m
CONFIG_PWM_LPSS_PCI=m
CONFIG_PWM_LPSS_PLATFORM=m
# CONFIG_PWM_PCA9685 is not set

#
# IRQ chip support
#
# end of IRQ chip support

# CONFIG_IPACK_BUS is not set
# CONFIG_RESET_CONTROLLER is not set

#
# PHY Subsystem
#
# CONFIG_GENERIC_PHY is not set
# CONFIG_USB_LGM_PHY is not set
# CONFIG_PHY_CAN_TRANSCEIVER is not set
# CONFIG_BCM_KONA_USB2_PHY is not set
# CONFIG_PHY_PXA_28NM_HSIC is not set
# CONFIG_PHY_PXA_28NM_USB2 is not set
# CONFIG_PHY_INTEL_LGM_EMMC is not set
# end of PHY Subsystem

CONFIG_POWERCAP=y
CONFIG_INTEL_RAPL_CORE=m
CONFIG_INTEL_RAPL=m
# CONFIG_IDLE_INJECT is not set
# CONFIG_DTPM is not set
# CONFIG_MCB is not set

#
# Performance monitor support
#
# end of Performance monitor support

CONFIG_RAS=y
# CONFIG_RAS_CEC is not set
# CONFIG_USB4 is not set

#
# Android
#
# CONFIG_ANDROID is not set
# end of Android

CONFIG_LIBNVDIMM=m
CONFIG_BLK_DEV_PMEM=m
CONFIG_ND_BLK=m
CONFIG_ND_CLAIM=y
CONFIG_ND_BTT=m
CONFIG_BTT=y
CONFIG_ND_PFN=m
CONFIG_NVDIMM_PFN=y
CONFIG_NVDIMM_DAX=y
CONFIG_NVDIMM_KEYS=y
CONFIG_DAX_DRIVER=y
CONFIG_DAX=y
CONFIG_DEV_DAX=m
CONFIG_DEV_DAX_PMEM=m
CONFIG_DEV_DAX_KMEM=m
CONFIG_DEV_DAX_PMEM_COMPAT=m
CONFIG_NVMEM=y
CONFIG_NVMEM_SYSFS=y
# CONFIG_NVMEM_NINTENDO_OTP is not set
# CONFIG_NVMEM_RMEM is not set

#
# HW tracing support
#
CONFIG_STM=m
# CONFIG_STM_PROTO_BASIC is not set
# CONFIG_STM_PROTO_SYS_T is not set
CONFIG_STM_DUMMY=m
CONFIG_STM_SOURCE_CONSOLE=m
CONFIG_STM_SOURCE_HEARTBEAT=m
CONFIG_STM_SOURCE_FTRACE=m
CONFIG_INTEL_TH=m
CONFIG_INTEL_TH_PCI=m
CONFIG_INTEL_TH_ACPI=m
CONFIG_INTEL_TH_GTH=m
CONFIG_INTEL_TH_STH=m
CONFIG_INTEL_TH_MSU=m
CONFIG_INTEL_TH_PTI=m
# CONFIG_INTEL_TH_DEBUG is not set
# end of HW tracing support

# CONFIG_FPGA is not set
# CONFIG_TEE is not set
# CONFIG_UNISYS_VISORBUS is not set
# CONFIG_SIOX is not set
# CONFIG_SLIMBUS is not set
# CONFIG_INTERCONNECT is not set
# CONFIG_COUNTER is not set
# CONFIG_MOST is not set
# end of Device Drivers

#
# File systems
#
CONFIG_DCACHE_WORD_ACCESS=y
# CONFIG_VALIDATE_FS_PARSER is not set
CONFIG_FS_IOMAP=y
CONFIG_EXT2_FS=m
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
CONFIG_EXT2_FS_SECURITY=y
# CONFIG_EXT3_FS is not set
CONFIG_EXT4_FS=y
CONFIG_EXT4_FS_POSIX_ACL=y
CONFIG_EXT4_FS_SECURITY=y
# CONFIG_EXT4_DEBUG is not set
CONFIG_EXT4_KUNIT_TESTS=m
CONFIG_JBD2=y
# CONFIG_JBD2_DEBUG is not set
CONFIG_FS_MBCACHE=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
CONFIG_XFS_FS=m
CONFIG_XFS_SUPPORT_V4=y
CONFIG_XFS_QUOTA=y
CONFIG_XFS_POSIX_ACL=y
CONFIG_XFS_RT=y
CONFIG_XFS_ONLINE_SCRUB=y
CONFIG_XFS_ONLINE_REPAIR=y
CONFIG_XFS_DEBUG=y
CONFIG_XFS_ASSERT_FATAL=y
CONFIG_GFS2_FS=m
CONFIG_GFS2_FS_LOCKING_DLM=y
CONFIG_OCFS2_FS=m
CONFIG_OCFS2_FS_O2CB=m
CONFIG_OCFS2_FS_USERSPACE_CLUSTER=m
CONFIG_OCFS2_FS_STATS=y
CONFIG_OCFS2_DEBUG_MASKLOG=y
# CONFIG_OCFS2_DEBUG_FS is not set
CONFIG_BTRFS_FS=m
CONFIG_BTRFS_FS_POSIX_ACL=y
# CONFIG_BTRFS_FS_CHECK_INTEGRITY is not set
# CONFIG_BTRFS_FS_RUN_SANITY_TESTS is not set
# CONFIG_BTRFS_DEBUG is not set
# CONFIG_BTRFS_ASSERT is not set
# CONFIG_BTRFS_FS_REF_VERIFY is not set
# CONFIG_NILFS2_FS is not set
CONFIG_F2FS_FS=m
CONFIG_F2FS_STAT_FS=y
CONFIG_F2FS_FS_XATTR=y
CONFIG_F2FS_FS_POSIX_ACL=y
CONFIG_F2FS_FS_SECURITY=y
# CONFIG_F2FS_CHECK_FS is not set
# CONFIG_F2FS_FAULT_INJECTION is not set
# CONFIG_F2FS_FS_COMPRESSION is not set
CONFIG_F2FS_IOSTAT=y
# CONFIG_ZONEFS_FS is not set
CONFIG_FS_DAX=y
CONFIG_FS_DAX_PMD=y
CONFIG_FS_POSIX_ACL=y
CONFIG_EXPORTFS=y
CONFIG_EXPORTFS_BLOCK_OPS=y
CONFIG_FILE_LOCKING=y
CONFIG_FS_ENCRYPTION=y
CONFIG_FS_ENCRYPTION_ALGS=y
# CONFIG_FS_VERITY is not set
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
CONFIG_FANOTIFY=y
CONFIG_FANOTIFY_ACCESS_PERMISSIONS=y
CONFIG_QUOTA=y
CONFIG_QUOTA_NETLINK_INTERFACE=y
CONFIG_PRINT_QUOTA_WARNING=y
# CONFIG_QUOTA_DEBUG is not set
CONFIG_QUOTA_TREE=y
# CONFIG_QFMT_V1 is not set
CONFIG_QFMT_V2=y
CONFIG_QUOTACTL=y
CONFIG_AUTOFS4_FS=y
CONFIG_AUTOFS_FS=y
CONFIG_FUSE_FS=m
CONFIG_CUSE=m
# CONFIG_VIRTIO_FS is not set
CONFIG_OVERLAY_FS=m
# CONFIG_OVERLAY_FS_REDIRECT_DIR is not set
# CONFIG_OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW is not set
# CONFIG_OVERLAY_FS_INDEX is not set
# CONFIG_OVERLAY_FS_XINO_AUTO is not set
# CONFIG_OVERLAY_FS_METACOPY is not set

#
# Caches
#
CONFIG_NETFS_SUPPORT=m
CONFIG_NETFS_STATS=y
CONFIG_FSCACHE=m
CONFIG_FSCACHE_STATS=y
# CONFIG_FSCACHE_DEBUG is not set
CONFIG_CACHEFILES=m
# CONFIG_CACHEFILES_DEBUG is not set
# end of Caches

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=m
# end of CD-ROM/DVD Filesystems

#
# DOS/FAT/EXFAT/NT Filesystems
#
CONFIG_FAT_FS=m
CONFIG_MSDOS_FS=m
CONFIG_VFAT_FS=m
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="ascii"
# CONFIG_FAT_DEFAULT_UTF8 is not set
CONFIG_FAT_KUNIT_TEST=m
# CONFIG_EXFAT_FS is not set
# CONFIG_NTFS_FS is not set
# CONFIG_NTFS3_FS is not set
# end of DOS/FAT/EXFAT/NT Filesystems

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_VMCORE=y
CONFIG_PROC_VMCORE_DEVICE_DUMP=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_PROC_CHILDREN=y
CONFIG_PROC_PID_ARCH_STATUS=y
CONFIG_KERNFS=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_TMPFS_XATTR=y
# CONFIG_TMPFS_INODE64 is not set
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_HUGETLB_PAGE_FREE_VMEMMAP=y
# CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON is not set
CONFIG_MEMFD_CREATE=y
CONFIG_ARCH_HAS_GIGANTIC_PAGE=y
CONFIG_CONFIGFS_FS=y
CONFIG_EFIVAR_FS=y
# end of Pseudo filesystems

CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ORANGEFS_FS is not set
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_ECRYPT_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
CONFIG_CRAMFS=m
CONFIG_CRAMFS_BLOCKDEV=y
CONFIG_SQUASHFS=m
# CONFIG_SQUASHFS_FILE_CACHE is not set
CONFIG_SQUASHFS_FILE_DIRECT=y
# CONFIG_SQUASHFS_DECOMP_SINGLE is not set
# CONFIG_SQUASHFS_DECOMP_MULTI is not set
CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU=y
CONFIG_SQUASHFS_XATTR=y
CONFIG_SQUASHFS_ZLIB=y
# CONFIG_SQUASHFS_LZ4 is not set
CONFIG_SQUASHFS_LZO=y
CONFIG_SQUASHFS_XZ=y
# CONFIG_SQUASHFS_ZSTD is not set
# CONFIG_SQUASHFS_4K_DEVBLK_SIZE is not set
# CONFIG_SQUASHFS_EMBEDDED is not set
CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3
# CONFIG_VXFS_FS is not set
CONFIG_MINIX_FS=m
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_QNX6FS_FS is not set
# CONFIG_ROMFS_FS is not set
CONFIG_PSTORE=y
CONFIG_PSTORE_DEFAULT_KMSG_BYTES=10240
CONFIG_PSTORE_DEFLATE_COMPRESS=y
# CONFIG_PSTORE_LZO_COMPRESS is not set
# CONFIG_PSTORE_LZ4_COMPRESS is not set
# CONFIG_PSTORE_LZ4HC_COMPRESS is not set
# CONFIG_PSTORE_842_COMPRESS is not set
# CONFIG_PSTORE_ZSTD_COMPRESS is not set
CONFIG_PSTORE_COMPRESS=y
CONFIG_PSTORE_DEFLATE_COMPRESS_DEFAULT=y
CONFIG_PSTORE_COMPRESS_DEFAULT="deflate"
# CONFIG_PSTORE_CONSOLE is not set
# CONFIG_PSTORE_PMSG is not set
# CONFIG_PSTORE_FTRACE is not set
CONFIG_PSTORE_RAM=m
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
# CONFIG_EROFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
# CONFIG_NFS_V2 is not set
CONFIG_NFS_V3=y
CONFIG_NFS_V3_ACL=y
CONFIG_NFS_V4=m
# CONFIG_NFS_SWAP is not set
CONFIG_NFS_V4_1=y
CONFIG_NFS_V4_2=y
CONFIG_PNFS_FILE_LAYOUT=m
CONFIG_PNFS_BLOCK=m
CONFIG_PNFS_FLEXFILE_LAYOUT=m
CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN="kernel.org"
# CONFIG_NFS_V4_1_MIGRATION is not set
CONFIG_NFS_V4_SECURITY_LABEL=y
CONFIG_ROOT_NFS=y
# CONFIG_NFS_USE_LEGACY_DNS is not set
CONFIG_NFS_USE_KERNEL_DNS=y
CONFIG_NFS_DEBUG=y
CONFIG_NFS_DISABLE_UDP_SUPPORT=y
# CONFIG_NFS_V4_2_READ_PLUS is not set
CONFIG_NFSD=m
CONFIG_NFSD_V2_ACL=y
CONFIG_NFSD_V3=y
CONFIG_NFSD_V3_ACL=y
CONFIG_NFSD_V4=y
CONFIG_NFSD_PNFS=y
# CONFIG_NFSD_BLOCKLAYOUT is not set
CONFIG_NFSD_SCSILAYOUT=y
# CONFIG_NFSD_FLEXFILELAYOUT is not set
# CONFIG_NFSD_V4_2_INTER_SSC is not set
CONFIG_NFSD_V4_SECURITY_LABEL=y
CONFIG_GRACE_PERIOD=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_NFS_ACL_SUPPORT=y
CONFIG_NFS_COMMON=y
CONFIG_NFS_V4_2_SSC_HELPER=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=m
CONFIG_SUNRPC_BACKCHANNEL=y
CONFIG_RPCSEC_GSS_KRB5=m
# CONFIG_SUNRPC_DISABLE_INSECURE_ENCTYPES is not set
CONFIG_SUNRPC_DEBUG=y
CONFIG_SUNRPC_XPRT_RDMA=m
CONFIG_CEPH_FS=m
# CONFIG_CEPH_FSCACHE is not set
CONFIG_CEPH_FS_POSIX_ACL=y
# CONFIG_CEPH_FS_SECURITY_LABEL is not set
CONFIG_CIFS=m
CONFIG_CIFS_STATS2=y
CONFIG_CIFS_ALLOW_INSECURE_LEGACY=y
CONFIG_CIFS_UPCALL=y
CONFIG_CIFS_XATTR=y
CONFIG_CIFS_POSIX=y
CONFIG_CIFS_DEBUG=y
# CONFIG_CIFS_DEBUG2 is not set
# CONFIG_CIFS_DEBUG_DUMP_KEYS is not set
CONFIG_CIFS_DFS_UPCALL=y
# CONFIG_CIFS_SWN_UPCALL is not set
# CONFIG_CIFS_SMB_DIRECT is not set
# CONFIG_CIFS_FSCACHE is not set
# CONFIG_SMB_SERVER is not set
CONFIG_CIFS_COMMON=m
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
CONFIG_9P_FS=y
CONFIG_9P_FS_POSIX_ACL=y
# CONFIG_9P_FS_SECURITY is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="utf8"
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_CODEPAGE_737=m
CONFIG_NLS_CODEPAGE_775=m
CONFIG_NLS_CODEPAGE_850=m
CONFIG_NLS_CODEPAGE_852=m
CONFIG_NLS_CODEPAGE_855=m
CONFIG_NLS_CODEPAGE_857=m
CONFIG_NLS_CODEPAGE_860=m
CONFIG_NLS_CODEPAGE_861=m
CONFIG_NLS_CODEPAGE_862=m
CONFIG_NLS_CODEPAGE_863=m
CONFIG_NLS_CODEPAGE_864=m
CONFIG_NLS_CODEPAGE_865=m
CONFIG_NLS_CODEPAGE_866=m
CONFIG_NLS_CODEPAGE_869=m
CONFIG_NLS_CODEPAGE_936=m
CONFIG_NLS_CODEPAGE_950=m
CONFIG_NLS_CODEPAGE_932=m
CONFIG_NLS_CODEPAGE_949=m
CONFIG_NLS_CODEPAGE_874=m
CONFIG_NLS_ISO8859_8=m
CONFIG_NLS_CODEPAGE_1250=m
CONFIG_NLS_CODEPAGE_1251=m
CONFIG_NLS_ASCII=y
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=m
CONFIG_NLS_ISO8859_3=m
CONFIG_NLS_ISO8859_4=m
CONFIG_NLS_ISO8859_5=m
CONFIG_NLS_ISO8859_6=m
CONFIG_NLS_ISO8859_7=m
CONFIG_NLS_ISO8859_9=m
CONFIG_NLS_ISO8859_13=m
CONFIG_NLS_ISO8859_14=m
CONFIG_NLS_ISO8859_15=m
CONFIG_NLS_KOI8_R=m
CONFIG_NLS_KOI8_U=m
CONFIG_NLS_MAC_ROMAN=m
CONFIG_NLS_MAC_CELTIC=m
CONFIG_NLS_MAC_CENTEURO=m
CONFIG_NLS_MAC_CROATIAN=m
CONFIG_NLS_MAC_CYRILLIC=m
CONFIG_NLS_MAC_GAELIC=m
CONFIG_NLS_MAC_GREEK=m
CONFIG_NLS_MAC_ICELAND=m
CONFIG_NLS_MAC_INUIT=m
CONFIG_NLS_MAC_ROMANIAN=m
CONFIG_NLS_MAC_TURKISH=m
CONFIG_NLS_UTF8=m
CONFIG_DLM=m
CONFIG_DLM_DEBUG=y
# CONFIG_UNICODE is not set
CONFIG_IO_WQ=y
# end of File systems

#
# Security options
#
CONFIG_KEYS=y
# CONFIG_KEYS_REQUEST_CACHE is not set
CONFIG_PERSISTENT_KEYRINGS=y
CONFIG_TRUSTED_KEYS=y
CONFIG_ENCRYPTED_KEYS=y
# CONFIG_KEY_DH_OPERATIONS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
CONFIG_SECURITY=y
CONFIG_SECURITY_WRITABLE_HOOKS=y
CONFIG_SECURITYFS=y
CONFIG_SECURITY_NETWORK=y
CONFIG_PAGE_TABLE_ISOLATION=y
# CONFIG_SECURITY_INFINIBAND is not set
CONFIG_SECURITY_NETWORK_XFRM=y
CONFIG_SECURITY_PATH=y
CONFIG_INTEL_TXT=y
CONFIG_LSM_MMAP_MIN_ADDR=65535
CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR=y
CONFIG_HARDENED_USERCOPY=y
CONFIG_HARDENED_USERCOPY_FALLBACK=y
CONFIG_FORTIFY_SOURCE=y
# CONFIG_STATIC_USERMODEHELPER is not set
CONFIG_SECURITY_SELINUX=y
CONFIG_SECURITY_SELINUX_BOOTPARAM=y
CONFIG_SECURITY_SELINUX_DISABLE=y
CONFIG_SECURITY_SELINUX_DEVELOP=y
CONFIG_SECURITY_SELINUX_AVC_STATS=y
CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE=1
CONFIG_SECURITY_SELINUX_SIDTAB_HASH_BITS=9
CONFIG_SECURITY_SELINUX_SID2STR_CACHE_SIZE=256
# CONFIG_SECURITY_SMACK is not set
# CONFIG_SECURITY_TOMOYO is not set
CONFIG_SECURITY_APPARMOR=y
CONFIG_SECURITY_APPARMOR_HASH=y
CONFIG_SECURITY_APPARMOR_HASH_DEFAULT=y
# CONFIG_SECURITY_APPARMOR_DEBUG is not set
CONFIG_SECURITY_APPARMOR_KUNIT_TEST=y
# CONFIG_SECURITY_LOADPIN is not set
CONFIG_SECURITY_YAMA=y
# CONFIG_SECURITY_SAFESETID is not set
# CONFIG_SECURITY_LOCKDOWN_LSM is not set
# CONFIG_SECURITY_LANDLOCK is not set
CONFIG_INTEGRITY=y
CONFIG_INTEGRITY_SIGNATURE=y
CONFIG_INTEGRITY_ASYMMETRIC_KEYS=y
CONFIG_INTEGRITY_TRUSTED_KEYRING=y
# CONFIG_INTEGRITY_PLATFORM_KEYRING is not set
CONFIG_INTEGRITY_AUDIT=y
CONFIG_IMA=y
CONFIG_IMA_MEASURE_PCR_IDX=10
CONFIG_IMA_LSM_RULES=y
# CONFIG_IMA_TEMPLATE is not set
CONFIG_IMA_NG_TEMPLATE=y
# CONFIG_IMA_SIG_TEMPLATE is not set
CONFIG_IMA_DEFAULT_TEMPLATE="ima-ng"
CONFIG_IMA_DEFAULT_HASH_SHA1=y
# CONFIG_IMA_DEFAULT_HASH_SHA256 is not set
# CONFIG_IMA_DEFAULT_HASH_SHA512 is not set
CONFIG_IMA_DEFAULT_HASH="sha1"
# CONFIG_IMA_WRITE_POLICY is not set
# CONFIG_IMA_READ_POLICY is not set
CONFIG_IMA_APPRAISE=y
# CONFIG_IMA_ARCH_POLICY is not set
# CONFIG_IMA_APPRAISE_BUILD_POLICY is not set
CONFIG_IMA_APPRAISE_BOOTPARAM=y
# CONFIG_IMA_APPRAISE_MODSIG is not set
CONFIG_IMA_TRUSTED_KEYRING=y
# CONFIG_IMA_BLACKLIST_KEYRING is not set
# CONFIG_IMA_LOAD_X509 is not set
CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS=y
CONFIG_IMA_QUEUE_EARLY_BOOT_KEYS=y
# CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT is not set
# CONFIG_IMA_DISABLE_HTABLE is not set
CONFIG_EVM=y
CONFIG_EVM_ATTR_FSUUID=y
# CONFIG_EVM_ADD_XATTRS is not set
# CONFIG_EVM_LOAD_X509 is not set
CONFIG_DEFAULT_SECURITY_SELINUX=y
# CONFIG_DEFAULT_SECURITY_APPARMOR is not set
# CONFIG_DEFAULT_SECURITY_DAC is not set
CONFIG_LSM="landlock,lockdown,yama,loadpin,safesetid,integrity,selinux,smack,tomoyo,apparmor,bpf"

#
# Kernel hardening options
#

#
# Memory initialization
#
CONFIG_INIT_STACK_NONE=y
# CONFIG_INIT_ON_ALLOC_DEFAULT_ON is not set
# CONFIG_INIT_ON_FREE_DEFAULT_ON is not set
# end of Memory initialization
# end of Kernel hardening options
# end of Security options

CONFIG_XOR_BLOCKS=m
CONFIG_ASYNC_CORE=m
CONFIG_ASYNC_MEMCPY=m
CONFIG_ASYNC_XOR=m
CONFIG_ASYNC_PQ=m
CONFIG_ASYNC_RAID6_RECOV=m
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_SKCIPHER=y
CONFIG_CRYPTO_SKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_RNG_DEFAULT=y
CONFIG_CRYPTO_AKCIPHER2=y
CONFIG_CRYPTO_AKCIPHER=y
CONFIG_CRYPTO_KPP2=y
CONFIG_CRYPTO_KPP=m
CONFIG_CRYPTO_ACOMP2=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
CONFIG_CRYPTO_USER=m
CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
CONFIG_CRYPTO_GF128MUL=y
CONFIG_CRYPTO_NULL=y
CONFIG_CRYPTO_NULL2=y
CONFIG_CRYPTO_PCRYPT=m
CONFIG_CRYPTO_CRYPTD=y
CONFIG_CRYPTO_AUTHENC=m
CONFIG_CRYPTO_TEST=m
CONFIG_CRYPTO_SIMD=y

#
# Public-key cryptography
#
CONFIG_CRYPTO_RSA=y
CONFIG_CRYPTO_DH=m
CONFIG_CRYPTO_ECC=m
CONFIG_CRYPTO_ECDH=m
# CONFIG_CRYPTO_ECDSA is not set
# CONFIG_CRYPTO_ECRDSA is not set
# CONFIG_CRYPTO_SM2 is not set
# CONFIG_CRYPTO_CURVE25519 is not set
# CONFIG_CRYPTO_CURVE25519_X86 is not set

#
# Authenticated Encryption with Associated Data
#
CONFIG_CRYPTO_CCM=m
CONFIG_CRYPTO_GCM=y
CONFIG_CRYPTO_CHACHA20POLY1305=m
# CONFIG_CRYPTO_AEGIS128 is not set
# CONFIG_CRYPTO_AEGIS128_AESNI_SSE2 is not set
CONFIG_CRYPTO_SEQIV=y
CONFIG_CRYPTO_ECHAINIV=m

#
# Block modes
#
CONFIG_CRYPTO_CBC=y
CONFIG_CRYPTO_CFB=y
CONFIG_CRYPTO_CTR=y
CONFIG_CRYPTO_CTS=m
CONFIG_CRYPTO_ECB=y
CONFIG_CRYPTO_LRW=m
# CONFIG_CRYPTO_OFB is not set
CONFIG_CRYPTO_PCBC=m
CONFIG_CRYPTO_XTS=m
# CONFIG_CRYPTO_KEYWRAP is not set
# CONFIG_CRYPTO_NHPOLY1305_SSE2 is not set
# CONFIG_CRYPTO_NHPOLY1305_AVX2 is not set
# CONFIG_CRYPTO_ADIANTUM is not set
CONFIG_CRYPTO_ESSIV=m

#
# Hash modes
#
CONFIG_CRYPTO_CMAC=m
CONFIG_CRYPTO_HMAC=y
CONFIG_CRYPTO_XCBC=m
CONFIG_CRYPTO_VMAC=m

#
# Digest
#
CONFIG_CRYPTO_CRC32C=y
CONFIG_CRYPTO_CRC32C_INTEL=m
CONFIG_CRYPTO_CRC32=m
CONFIG_CRYPTO_CRC32_PCLMUL=m
CONFIG_CRYPTO_XXHASH=m
CONFIG_CRYPTO_BLAKE2B=m
# CONFIG_CRYPTO_BLAKE2S is not set
# CONFIG_CRYPTO_BLAKE2S_X86 is not set
CONFIG_CRYPTO_CRCT10DIF=y
CONFIG_CRYPTO_CRCT10DIF_PCLMUL=m
CONFIG_CRYPTO_GHASH=y
CONFIG_CRYPTO_POLY1305=m
CONFIG_CRYPTO_POLY1305_X86_64=m
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_MICHAEL_MIC=m
CONFIG_CRYPTO_RMD160=m
CONFIG_CRYPTO_SHA1=y
CONFIG_CRYPTO_SHA1_SSSE3=y
CONFIG_CRYPTO_SHA256_SSSE3=y
CONFIG_CRYPTO_SHA512_SSSE3=m
CONFIG_CRYPTO_SHA256=y
CONFIG_CRYPTO_SHA512=y
CONFIG_CRYPTO_SHA3=m
# CONFIG_CRYPTO_SM3 is not set
# CONFIG_CRYPTO_STREEBOG is not set
CONFIG_CRYPTO_WP512=m
CONFIG_CRYPTO_GHASH_CLMUL_NI_INTEL=m

#
# Ciphers
#
CONFIG_CRYPTO_AES=y
# CONFIG_CRYPTO_AES_TI is not set
CONFIG_CRYPTO_AES_NI_INTEL=y
CONFIG_CRYPTO_ANUBIS=m
CONFIG_CRYPTO_ARC4=m
CONFIG_CRYPTO_BLOWFISH=m
CONFIG_CRYPTO_BLOWFISH_COMMON=m
CONFIG_CRYPTO_BLOWFISH_X86_64=m
CONFIG_CRYPTO_CAMELLIA=m
CONFIG_CRYPTO_CAMELLIA_X86_64=m
CONFIG_CRYPTO_CAMELLIA_AESNI_AVX_X86_64=m
CONFIG_CRYPTO_CAMELLIA_AESNI_AVX2_X86_64=m
CONFIG_CRYPTO_CAST_COMMON=m
CONFIG_CRYPTO_CAST5=m
CONFIG_CRYPTO_CAST5_AVX_X86_64=m
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_CAST6_AVX_X86_64=m
CONFIG_CRYPTO_DES=m
# CONFIG_CRYPTO_DES3_EDE_X86_64 is not set
CONFIG_CRYPTO_FCRYPT=m
CONFIG_CRYPTO_KHAZAD=m
CONFIG_CRYPTO_CHACHA20=m
CONFIG_CRYPTO_CHACHA20_X86_64=m
CONFIG_CRYPTO_SEED=m
CONFIG_CRYPTO_SERPENT=m
CONFIG_CRYPTO_SERPENT_SSE2_X86_64=m
CONFIG_CRYPTO_SERPENT_AVX_X86_64=m
CONFIG_CRYPTO_SERPENT_AVX2_X86_64=m
# CONFIG_CRYPTO_SM4 is not set
# CONFIG_CRYPTO_SM4_AESNI_AVX_X86_64 is not set
# CONFIG_CRYPTO_SM4_AESNI_AVX2_X86_64 is not set
CONFIG_CRYPTO_TEA=m
CONFIG_CRYPTO_TWOFISH=m
CONFIG_CRYPTO_TWOFISH_COMMON=m
CONFIG_CRYPTO_TWOFISH_X86_64=m
CONFIG_CRYPTO_TWOFISH_X86_64_3WAY=m
CONFIG_CRYPTO_TWOFISH_AVX_X86_64=m

#
# Compression
#
CONFIG_CRYPTO_DEFLATE=y
CONFIG_CRYPTO_LZO=y
# CONFIG_CRYPTO_842 is not set
# CONFIG_CRYPTO_LZ4 is not set
# CONFIG_CRYPTO_LZ4HC is not set
# CONFIG_CRYPTO_ZSTD is not set

#
# Random Number Generation
#
CONFIG_CRYPTO_ANSI_CPRNG=m
CONFIG_CRYPTO_DRBG_MENU=y
CONFIG_CRYPTO_DRBG_HMAC=y
CONFIG_CRYPTO_DRBG_HASH=y
CONFIG_CRYPTO_DRBG_CTR=y
CONFIG_CRYPTO_DRBG=y
CONFIG_CRYPTO_JITTERENTROPY=y
CONFIG_CRYPTO_USER_API=y
CONFIG_CRYPTO_USER_API_HASH=y
CONFIG_CRYPTO_USER_API_SKCIPHER=y
CONFIG_CRYPTO_USER_API_RNG=y
# CONFIG_CRYPTO_USER_API_RNG_CAVP is not set
CONFIG_CRYPTO_USER_API_AEAD=y
CONFIG_CRYPTO_USER_API_ENABLE_OBSOLETE=y
# CONFIG_CRYPTO_STATS is not set
CONFIG_CRYPTO_HASH_INFO=y

#
# Crypto library routines
#
CONFIG_CRYPTO_LIB_AES=y
CONFIG_CRYPTO_LIB_ARC4=m
# CONFIG_CRYPTO_LIB_BLAKE2S is not set
CONFIG_CRYPTO_ARCH_HAVE_LIB_CHACHA=m
CONFIG_CRYPTO_LIB_CHACHA_GENERIC=m
# CONFIG_CRYPTO_LIB_CHACHA is not set
# CONFIG_CRYPTO_LIB_CURVE25519 is not set
CONFIG_CRYPTO_LIB_DES=m
CONFIG_CRYPTO_LIB_POLY1305_RSIZE=11
CONFIG_CRYPTO_ARCH_HAVE_LIB_POLY1305=m
CONFIG_CRYPTO_LIB_POLY1305_GENERIC=m
# CONFIG_CRYPTO_LIB_POLY1305 is not set
# CONFIG_CRYPTO_LIB_CHACHA20POLY1305 is not set
CONFIG_CRYPTO_LIB_SHA256=y
CONFIG_CRYPTO_HW=y
CONFIG_CRYPTO_DEV_PADLOCK=m
CONFIG_CRYPTO_DEV_PADLOCK_AES=m
CONFIG_CRYPTO_DEV_PADLOCK_SHA=m
# CONFIG_CRYPTO_DEV_ATMEL_ECC is not set
# CONFIG_CRYPTO_DEV_ATMEL_SHA204A is not set
CONFIG_CRYPTO_DEV_CCP=y
CONFIG_CRYPTO_DEV_CCP_DD=m
CONFIG_CRYPTO_DEV_SP_CCP=y
CONFIG_CRYPTO_DEV_CCP_CRYPTO=m
CONFIG_CRYPTO_DEV_SP_PSP=y
# CONFIG_CRYPTO_DEV_CCP_DEBUGFS is not set
CONFIG_CRYPTO_DEV_QAT=m
CONFIG_CRYPTO_DEV_QAT_DH895xCC=m
CONFIG_CRYPTO_DEV_QAT_C3XXX=m
CONFIG_CRYPTO_DEV_QAT_C62X=m
# CONFIG_CRYPTO_DEV_QAT_4XXX is not set
CONFIG_CRYPTO_DEV_QAT_DH895xCCVF=m
CONFIG_CRYPTO_DEV_QAT_C3XXXVF=m
CONFIG_CRYPTO_DEV_QAT_C62XVF=m
CONFIG_CRYPTO_DEV_NITROX=m
CONFIG_CRYPTO_DEV_NITROX_CNN55XX=m
# CONFIG_CRYPTO_DEV_VIRTIO is not set
# CONFIG_CRYPTO_DEV_SAFEXCEL is not set
# CONFIG_CRYPTO_DEV_AMLOGIC_GXL is not set
CONFIG_ASYMMETRIC_KEY_TYPE=y
CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE=y
# CONFIG_ASYMMETRIC_TPM_KEY_SUBTYPE is not set
CONFIG_X509_CERTIFICATE_PARSER=y
# CONFIG_PKCS8_PRIVATE_KEY_PARSER is not set
CONFIG_PKCS7_MESSAGE_PARSER=y
# CONFIG_PKCS7_TEST_KEY is not set
CONFIG_SIGNED_PE_FILE_VERIFICATION=y

#
# Certificates for signature checking
#
CONFIG_MODULE_SIG_KEY="certs/signing_key.pem"
CONFIG_MODULE_SIG_KEY_TYPE_RSA=y
# CONFIG_MODULE_SIG_KEY_TYPE_ECDSA is not set
CONFIG_SYSTEM_TRUSTED_KEYRING=y
CONFIG_SYSTEM_TRUSTED_KEYS=""
# CONFIG_SYSTEM_EXTRA_CERTIFICATE is not set
# CONFIG_SECONDARY_TRUSTED_KEYRING is not set
CONFIG_SYSTEM_BLACKLIST_KEYRING=y
CONFIG_SYSTEM_BLACKLIST_HASH_LIST=""
# CONFIG_SYSTEM_REVOCATION_LIST is not set
# end of Certificates for signature checking

CONFIG_BINARY_PRINTF=y

#
# Library routines
#
CONFIG_RAID6_PQ=m
CONFIG_RAID6_PQ_BENCHMARK=y
CONFIG_LINEAR_RANGES=m
# CONFIG_PACKING is not set
CONFIG_BITREVERSE=y
CONFIG_GENERIC_STRNCPY_FROM_USER=y
CONFIG_GENERIC_STRNLEN_USER=y
CONFIG_GENERIC_NET_UTILS=y
CONFIG_GENERIC_FIND_FIRST_BIT=y
CONFIG_CORDIC=m
# CONFIG_PRIME_NUMBERS is not set
CONFIG_RATIONAL=y
CONFIG_GENERIC_PCI_IOMAP=y
CONFIG_GENERIC_IOMAP=y
CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
CONFIG_ARCH_HAS_FAST_MULTIPLIER=y
CONFIG_ARCH_USE_SYM_ANNOTATIONS=y
CONFIG_CRC_CCITT=y
CONFIG_CRC16=y
CONFIG_CRC_T10DIF=y
CONFIG_CRC_ITU_T=m
CONFIG_CRC32=y
# CONFIG_CRC32_SELFTEST is not set
CONFIG_CRC32_SLICEBY8=y
# CONFIG_CRC32_SLICEBY4 is not set
# CONFIG_CRC32_SARWATE is not set
# CONFIG_CRC32_BIT is not set
# CONFIG_CRC64 is not set
# CONFIG_CRC4 is not set
CONFIG_CRC7=m
CONFIG_LIBCRC32C=m
CONFIG_CRC8=m
CONFIG_XXHASH=y
# CONFIG_RANDOM32_SELFTEST is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_LZO_COMPRESS=y
CONFIG_LZO_DECOMPRESS=y
CONFIG_LZ4_DECOMPRESS=y
CONFIG_ZSTD_COMPRESS=m
CONFIG_ZSTD_DECOMPRESS=y
CONFIG_XZ_DEC=y
CONFIG_XZ_DEC_X86=y
CONFIG_XZ_DEC_POWERPC=y
CONFIG_XZ_DEC_IA64=y
CONFIG_XZ_DEC_ARM=y
CONFIG_XZ_DEC_ARMTHUMB=y
CONFIG_XZ_DEC_SPARC=y
CONFIG_XZ_DEC_BCJ=y
# CONFIG_XZ_DEC_TEST is not set
CONFIG_DECOMPRESS_GZIP=y
CONFIG_DECOMPRESS_BZIP2=y
CONFIG_DECOMPRESS_LZMA=y
CONFIG_DECOMPRESS_XZ=y
CONFIG_DECOMPRESS_LZO=y
CONFIG_DECOMPRESS_LZ4=y
CONFIG_DECOMPRESS_ZSTD=y
CONFIG_GENERIC_ALLOCATOR=y
CONFIG_REED_SOLOMON=m
CONFIG_REED_SOLOMON_ENC8=y
CONFIG_REED_SOLOMON_DEC8=y
CONFIG_TEXTSEARCH=y
CONFIG_TEXTSEARCH_KMP=m
CONFIG_TEXTSEARCH_BM=m
CONFIG_TEXTSEARCH_FSM=m
CONFIG_INTERVAL_TREE=y
CONFIG_XARRAY_MULTI=y
CONFIG_ASSOCIATIVE_ARRAY=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT_MAP=y
CONFIG_HAS_DMA=y
CONFIG_DMA_OPS=y
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_ARCH_DMA_ADDR_T_64BIT=y
CONFIG_SWIOTLB=y
CONFIG_DMA_CMA=y
# CONFIG_DMA_PERNUMA_CMA is not set

#
# Default contiguous memory area size:
#
CONFIG_CMA_SIZE_MBYTES=0
CONFIG_CMA_SIZE_SEL_MBYTES=y
# CONFIG_CMA_SIZE_SEL_PERCENTAGE is not set
# CONFIG_CMA_SIZE_SEL_MIN is not set
# CONFIG_CMA_SIZE_SEL_MAX is not set
CONFIG_CMA_ALIGNMENT=8
# CONFIG_DMA_API_DEBUG is not set
# CONFIG_DMA_MAP_BENCHMARK is not set
CONFIG_SGL_ALLOC=y
CONFIG_CHECK_SIGNATURE=y
CONFIG_CPUMASK_OFFSTACK=y
CONFIG_CPU_RMAP=y
CONFIG_DQL=y
CONFIG_GLOB=y
# CONFIG_GLOB_SELFTEST is not set
CONFIG_NLATTR=y
CONFIG_CLZ_TAB=y
CONFIG_IRQ_POLL=y
CONFIG_MPILIB=y
CONFIG_SIGNATURE=y
CONFIG_DIMLIB=y
CONFIG_OID_REGISTRY=y
CONFIG_UCS2_STRING=y
CONFIG_HAVE_GENERIC_VDSO=y
CONFIG_GENERIC_GETTIMEOFDAY=y
CONFIG_GENERIC_VDSO_TIME_NS=y
CONFIG_FONT_SUPPORT=y
# CONFIG_FONTS is not set
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
CONFIG_SG_POOL=y
CONFIG_ARCH_HAS_PMEM_API=y
CONFIG_MEMREGION=y
CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE=y
CONFIG_ARCH_HAS_COPY_MC=y
CONFIG_ARCH_STACKWALK=y
CONFIG_SBITMAP=y
# end of Library routines

CONFIG_ASN1_ENCODER=y

#
# Kernel hacking
#

#
# printk and dmesg options
#
CONFIG_PRINTK_TIME=y
CONFIG_PRINTK_CALLER=y
# CONFIG_STACKTRACE_BUILD_ID is not set
CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
CONFIG_CONSOLE_LOGLEVEL_QUIET=4
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
CONFIG_BOOT_PRINTK_DELAY=y
CONFIG_DYNAMIC_DEBUG=y
CONFIG_DYNAMIC_DEBUG_CORE=y
CONFIG_SYMBOLIC_ERRNAME=y
CONFIG_DEBUG_BUGVERBOSE=y
# end of printk and dmesg options

#
# Compile-time checks and compiler options
#
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_INFO_REDUCED=y
# CONFIG_DEBUG_INFO_COMPRESSED is not set
# CONFIG_DEBUG_INFO_SPLIT is not set
# CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT is not set
CONFIG_DEBUG_INFO_DWARF4=y
# CONFIG_DEBUG_INFO_DWARF5 is not set
CONFIG_PAHOLE_HAS_SPLIT_BTF=y
# CONFIG_GDB_SCRIPTS is not set
CONFIG_FRAME_WARN=2048
CONFIG_STRIP_ASM_SYMS=y
# CONFIG_READABLE_ASM is not set
# CONFIG_HEADERS_INSTALL is not set
CONFIG_DEBUG_SECTION_MISMATCH=y
CONFIG_SECTION_MISMATCH_WARN_ONLY=y
CONFIG_STACK_VALIDATION=y
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
# end of Compile-time checks and compiler options

#
# Generic Kernel Debugging Instruments
#
CONFIG_MAGIC_SYSRQ=y
CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x1
CONFIG_MAGIC_SYSRQ_SERIAL=y
CONFIG_MAGIC_SYSRQ_SERIAL_SEQUENCE=""
CONFIG_DEBUG_FS=y
CONFIG_DEBUG_FS_ALLOW_ALL=y
# CONFIG_DEBUG_FS_DISALLOW_MOUNT is not set
# CONFIG_DEBUG_FS_ALLOW_NONE is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
# CONFIG_UBSAN is not set
CONFIG_HAVE_ARCH_KCSAN=y
# end of Generic Kernel Debugging Instruments

CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_MISC=y

#
# Memory Debugging
#
# CONFIG_PAGE_EXTENSION is not set
# CONFIG_DEBUG_PAGEALLOC is not set
# CONFIG_PAGE_OWNER is not set
# CONFIG_PAGE_POISONING is not set
# CONFIG_DEBUG_PAGE_REF is not set
# CONFIG_DEBUG_RODATA_TEST is not set
CONFIG_ARCH_HAS_DEBUG_WX=y
# CONFIG_DEBUG_WX is not set
CONFIG_GENERIC_PTDUMP=y
# CONFIG_PTDUMP_DEBUGFS is not set
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_SLUB_DEBUG_ON is not set
# CONFIG_SLUB_STATS is not set
CONFIG_HAVE_DEBUG_KMEMLEAK=y
# CONFIG_DEBUG_KMEMLEAK is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_SCHED_STACK_END_CHECK is not set
CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE=y
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_VM_PGTABLE is not set
CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y
# CONFIG_DEBUG_VIRTUAL is not set
CONFIG_DEBUG_MEMORY_INIT=y
# CONFIG_DEBUG_PER_CPU_MAPS is not set
CONFIG_HAVE_ARCH_KASAN=y
CONFIG_HAVE_ARCH_KASAN_VMALLOC=y
CONFIG_CC_HAS_KASAN_GENERIC=y
CONFIG_CC_HAS_WORKING_NOSANITIZE_ADDRESS=y
# CONFIG_KASAN is not set
CONFIG_HAVE_ARCH_KFENCE=y
# CONFIG_KFENCE is not set
# end of Memory Debugging

CONFIG_DEBUG_SHIRQ=y

#
# Debug Oops, Lockups and Hangs
#
CONFIG_PANIC_ON_OOPS=y
CONFIG_PANIC_ON_OOPS_VALUE=1
CONFIG_PANIC_TIMEOUT=0
CONFIG_LOCKUP_DETECTOR=y
CONFIG_SOFTLOCKUP_DETECTOR=y
# CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC is not set
CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC_VALUE=0
CONFIG_HARDLOCKUP_DETECTOR_PERF=y
CONFIG_HARDLOCKUP_CHECK_TIMESTAMP=y
CONFIG_HARDLOCKUP_DETECTOR=y
CONFIG_BOOTPARAM_HARDLOCKUP_PANIC=y
CONFIG_BOOTPARAM_HARDLOCKUP_PANIC_VALUE=1
CONFIG_DETECT_HUNG_TASK=y
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=480
# CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set
CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=0
CONFIG_WQ_WATCHDOG=y
# CONFIG_TEST_LOCKUP is not set
# end of Debug Oops, Lockups and Hangs

#
# Scheduler Debugging
#
CONFIG_SCHED_DEBUG=y
CONFIG_SCHED_INFO=y
CONFIG_SCHEDSTATS=y
# end of Scheduler Debugging

# CONFIG_DEBUG_TIMEKEEPING is not set

#
# Lock Debugging (spinlocks, mutexes, etc...)
#
CONFIG_LOCK_DEBUGGING_SUPPORT=y
# CONFIG_PROVE_LOCKING is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
# CONFIG_DEBUG_RWSEMS is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
CONFIG_DEBUG_ATOMIC_SLEEP=y
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
# CONFIG_LOCK_TORTURE_TEST is not set
# CONFIG_WW_MUTEX_SELFTEST is not set
# CONFIG_SCF_TORTURE_TEST is not set
# CONFIG_CSD_LOCK_WAIT_DEBUG is not set
# end of Lock Debugging (spinlocks, mutexes, etc...)

# CONFIG_DEBUG_IRQFLAGS is not set
CONFIG_STACKTRACE=y
# CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
# CONFIG_DEBUG_KOBJECT is not set

#
# Debug kernel data structures
#
CONFIG_DEBUG_LIST=y
# CONFIG_DEBUG_PLIST is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
CONFIG_BUG_ON_DATA_CORRUPTION=y
# end of Debug kernel data structures

# CONFIG_DEBUG_CREDENTIALS is not set

#
# RCU Debugging
#
# CONFIG_RCU_SCALE_TEST is not set
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_RCU_REF_SCALE_TEST is not set
CONFIG_RCU_CPU_STALL_TIMEOUT=60
# CONFIG_RCU_TRACE is not set
# CONFIG_RCU_EQS_DEBUG is not set
# end of RCU Debugging

# CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
# CONFIG_CPU_HOTPLUG_STATE_CONTROL is not set
CONFIG_LATENCYTOP=y
CONFIG_USER_STACKTRACE_SUPPORT=y
CONFIG_NOP_TRACER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HAVE_FENTRY=y
CONFIG_HAVE_OBJTOOL_MCOUNT=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_TRACER_MAX_TRACE=y
CONFIG_TRACE_CLOCK=y
CONFIG_RING_BUFFER=y
CONFIG_EVENT_TRACING=y
CONFIG_CONTEXT_SWITCH_TRACER=y
CONFIG_TRACING=y
CONFIG_GENERIC_TRACER=y
CONFIG_TRACING_SUPPORT=y
CONFIG_FTRACE=y
# CONFIG_BOOTTIME_TRACING is not set
CONFIG_FUNCTION_TRACER=y
CONFIG_FUNCTION_GRAPH_TRACER=y
CONFIG_DYNAMIC_FTRACE=y
CONFIG_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y
CONFIG_DYNAMIC_FTRACE_WITH_ARGS=y
CONFIG_FUNCTION_PROFILER=y
CONFIG_STACK_TRACER=y
# CONFIG_IRQSOFF_TRACER is not set
CONFIG_SCHED_TRACER=y
CONFIG_HWLAT_TRACER=y
# CONFIG_OSNOISE_TRACER is not set
# CONFIG_TIMERLAT_TRACER is not set
# CONFIG_MMIOTRACE is not set
CONFIG_FTRACE_SYSCALLS=y
CONFIG_TRACER_SNAPSHOT=y
# CONFIG_TRACER_SNAPSHOT_PER_CPU_SWAP is not set
CONFIG_BRANCH_PROFILE_NONE=y
# CONFIG_PROFILE_ANNOTATED_BRANCHES is not set
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_KPROBE_EVENTS=y
# CONFIG_KPROBE_EVENTS_ON_NOTRACE is not set
CONFIG_UPROBE_EVENTS=y
CONFIG_BPF_EVENTS=y
CONFIG_DYNAMIC_EVENTS=y
CONFIG_PROBE_EVENTS=y
# CONFIG_BPF_KPROBE_OVERRIDE is not set
CONFIG_FTRACE_MCOUNT_RECORD=y
CONFIG_FTRACE_MCOUNT_USE_CC=y
CONFIG_TRACING_MAP=y
CONFIG_SYNTH_EVENTS=y
CONFIG_HIST_TRIGGERS=y
# CONFIG_TRACE_EVENT_INJECT is not set
# CONFIG_TRACEPOINT_BENCHMARK is not set
CONFIG_RING_BUFFER_BENCHMARK=m
# CONFIG_TRACE_EVAL_MAP_FILE is not set
# CONFIG_FTRACE_RECORD_RECURSION is not set
# CONFIG_FTRACE_STARTUP_TEST is not set
# CONFIG_RING_BUFFER_STARTUP_TEST is not set
# CONFIG_RING_BUFFER_VALIDATE_TIME_DELTAS is not set
# CONFIG_PREEMPTIRQ_DELAY_TEST is not set
# CONFIG_SYNTH_EVENT_GEN_TEST is not set
# CONFIG_KPROBE_EVENT_GEN_TEST is not set
# CONFIG_HIST_TRIGGERS_DEBUG is not set
CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
# CONFIG_SAMPLES is not set
CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y
CONFIG_STRICT_DEVMEM=y
# CONFIG_IO_STRICT_DEVMEM is not set

#
# x86 Debugging
#
CONFIG_TRACE_IRQFLAGS_NMI_SUPPORT=y
CONFIG_EARLY_PRINTK_USB=y
CONFIG_X86_VERBOSE_BOOTUP=y
CONFIG_EARLY_PRINTK=y
CONFIG_EARLY_PRINTK_DBGP=y
CONFIG_EARLY_PRINTK_USB_XDBC=y
# CONFIG_EFI_PGT_DUMP is not set
# CONFIG_DEBUG_TLBFLUSH is not set
CONFIG_HAVE_MMIOTRACE_SUPPORT=y
CONFIG_X86_DECODER_SELFTEST=y
CONFIG_IO_DELAY_0X80=y
# CONFIG_IO_DELAY_0XED is not set
# CONFIG_IO_DELAY_UDELAY is not set
# CONFIG_IO_DELAY_NONE is not set
CONFIG_DEBUG_BOOT_PARAMS=y
# CONFIG_CPA_DEBUG is not set
# CONFIG_DEBUG_ENTRY is not set
# CONFIG_DEBUG_NMI_SELFTEST is not set
# CONFIG_X86_DEBUG_FPU is not set
# CONFIG_PUNIT_ATOM_DEBUG is not set
CONFIG_UNWINDER_ORC=y
# CONFIG_UNWINDER_FRAME_POINTER is not set
# end of x86 Debugging

#
# Kernel Testing and Coverage
#
CONFIG_KUNIT=y
CONFIG_KUNIT_DEBUGFS=y
# CONFIG_KUNIT_TEST is not set
# CONFIG_KUNIT_EXAMPLE_TEST is not set
CONFIG_KUNIT_ALL_TESTS=m
# CONFIG_NOTIFIER_ERROR_INJECTION is not set
CONFIG_FUNCTION_ERROR_INJECTION=y
CONFIG_FAULT_INJECTION=y
# CONFIG_FAILSLAB is not set
# CONFIG_FAIL_PAGE_ALLOC is not set
# CONFIG_FAULT_INJECTION_USERCOPY is not set
CONFIG_FAIL_MAKE_REQUEST=y
# CONFIG_FAIL_IO_TIMEOUT is not set
# CONFIG_FAIL_FUTEX is not set
CONFIG_FAULT_INJECTION_DEBUG_FS=y
# CONFIG_FAIL_FUNCTION is not set
# CONFIG_FAIL_MMC_REQUEST is not set
# CONFIG_FAIL_SUNRPC is not set
CONFIG_ARCH_HAS_KCOV=y
CONFIG_CC_HAS_SANCOV_TRACE_PC=y
# CONFIG_KCOV is not set
CONFIG_RUNTIME_TESTING_MENU=y
# CONFIG_LKDTM is not set
# CONFIG_TEST_LIST_SORT is not set
# CONFIG_TEST_MIN_HEAP is not set
# CONFIG_TEST_SORT is not set
# CONFIG_TEST_DIV64 is not set
# CONFIG_KPROBES_SANITY_TEST is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_RBTREE_TEST is not set
# CONFIG_REED_SOLOMON_TEST is not set
# CONFIG_INTERVAL_TREE_TEST is not set
# CONFIG_PERCPU_TEST is not set
CONFIG_ATOMIC64_SELFTEST=y
# CONFIG_ASYNC_RAID6_TEST is not set
# CONFIG_TEST_HEXDUMP is not set
# CONFIG_STRING_SELFTEST is not set
# CONFIG_TEST_STRING_HELPERS is not set
# CONFIG_TEST_STRSCPY is not set
# CONFIG_TEST_KSTRTOX is not set
# CONFIG_TEST_PRINTF is not set
# CONFIG_TEST_SCANF is not set
# CONFIG_TEST_BITMAP is not set
# CONFIG_TEST_UUID is not set
# CONFIG_TEST_XARRAY is not set
# CONFIG_TEST_OVERFLOW is not set
# CONFIG_TEST_RHASHTABLE is not set
# CONFIG_TEST_HASH is not set
# CONFIG_TEST_IDA is not set
# CONFIG_TEST_LKM is not set
# CONFIG_TEST_BITOPS is not set
# CONFIG_TEST_VMALLOC is not set
# CONFIG_TEST_USER_COPY is not set
CONFIG_TEST_BPF=m
# CONFIG_TEST_BLACKHOLE_DEV is not set
# CONFIG_FIND_BIT_BENCHMARK is not set
# CONFIG_TEST_FIRMWARE is not set
# CONFIG_TEST_SYSCTL is not set
CONFIG_BITFIELD_KUNIT=m
CONFIG_RESOURCE_KUNIT_TEST=m
CONFIG_SYSCTL_KUNIT_TEST=m
CONFIG_LIST_KUNIT_TEST=m
CONFIG_LINEAR_RANGES_TEST=m
CONFIG_CMDLINE_KUNIT_TEST=m
CONFIG_BITS_TEST=m
CONFIG_SLUB_KUNIT_TEST=m
CONFIG_RATIONAL_KUNIT_TEST=m
# CONFIG_TEST_UDELAY is not set
# CONFIG_TEST_STATIC_KEYS is not set
# CONFIG_TEST_KMOD is not set
# CONFIG_TEST_MEMCAT_P is not set
# CONFIG_TEST_LIVEPATCH is not set
# CONFIG_TEST_STACKINIT is not set
# CONFIG_TEST_MEMINIT is not set
# CONFIG_TEST_HMM is not set
# CONFIG_TEST_FREE_PAGES is not set
# CONFIG_TEST_FPU is not set
# CONFIG_TEST_CLOCKSOURCE_WATCHDOG is not set
CONFIG_ARCH_USE_MEMTEST=y
# CONFIG_MEMTEST is not set
# CONFIG_HYPERV_TESTING is not set
# end of Kernel Testing and Coverage
# end of Kernel hacking

[-- Attachment #3: job-script --]
[-- Type: text/plain, Size: 5929 bytes --]

#!/bin/sh

export_top_env()
{
	export suite='nvml'
	export testcase='nvml'
	export category='functional'
	export branch='linux-review/Rongwei-Wang/mm-thp-fix-file-backed-THP-race-in-collapse_file/20210906-201318'
	export test='pmem'
	export group='pmem'
	export mount_option='dax'
	export job_origin='nvml-dax.yaml'
	export queue_cmdline_keys='branch
commit
queue_at_least_once'
	export queue='validate'
	export testbox='lkp-bdw-de1'
	export tbox_group='lkp-bdw-de1'
	export kconfig='x86_64-rhel-8.3'
	export submit_id='613d7026ced53433ef0cd0f7'
	export job_file='/lkp/jobs/scheduled/lkp-bdw-de1/nvml-32G_4G-ext4-pmem-dax-1-pmem-ucode=0x7000019-debian-10.4-x86_64-20200603.cgz-20753096b67c9e841862c4f6f984aaac7dbe7183-20210912-78831-17xrnh2-1.yaml'
	export id='5ab679e3c75e4e30d6b824578fe0e8b206bedc8b'
	export queuer_version='/lkp-src'
	export model='Broadwell-DE'
	export nr_node=1
	export nr_cpu=16
	export memory='48G'
	export nr_hdd_partitions=1
	export nr_ssd_partitions=1
	export ssd_partitions='/dev/disk/by-id/ata-INTEL_SSDSC2BA800G4_BTHV410402GY800OGN-part2'
	export hdd_partitions='/dev/disk/by-id/ata-ST9500620NS_9XF26EB5-part1'
	export swap_partitions=
	export rootfs_partition='/dev/disk/by-id/ata-INTEL_SSDSC2BA800G4_BTHV410402GY800OGN-part1'
	export brand='Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz'
	export need_kconfig='{"NVDIMM_PFN"=>"y"}
{"FS_DAX"=>"y"}
LIBNVDIMM
BTT
BLK_DEV_PMEM
X86_PMEM_LEGACY
EXT4_FS'
	export commit='20753096b67c9e841862c4f6f984aaac7dbe7183'
	export ucode='0x7000019'
	export need_kconfig_hw='{"IGB"=>"y"}
{"NETDEVICES"=>"y"}
{"ETHERNET"=>"y"}
{"NET_VENDOR_INTEL"=>"y"}
{"PCI"=>"y"}
SATA_AHCI
SATA_AHCI_PLATFORM
ATA
{"HAS_DMA"=>"y"}'
	export bisect_dmesg=true
	export enqueue_time='2021-09-12 11:12:39 +0800'
	export _id='613d7026ced53433ef0cd0f7'
	export _rt='/result/nvml/32G_4G-ext4-pmem-dax-1-pmem-ucode=0x7000019/lkp-bdw-de1/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/20753096b67c9e841862c4f6f984aaac7dbe7183'
	export user='lkp'
	export compiler='gcc-9'
	export LKP_SERVER='internal-lkp-server'
	export head_commit='f091780fe2ada36e127a108c2e5eb1edc9e22f3c'
	export base_commit='7d2a07b769330c34b4deabeed939325c77a7ec2f'
	export rootfs='debian-10.4-x86_64-20200603.cgz'
	export result_root='/result/nvml/32G_4G-ext4-pmem-dax-1-pmem-ucode=0x7000019/lkp-bdw-de1/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/20753096b67c9e841862c4f6f984aaac7dbe7183/4'
	export scheduler_version='/lkp/lkp/.src-20210910-192256'
	export arch='x86_64'
	export max_uptime=2100
	export initrd='/osimage/debian/debian-10.4-x86_64-20200603.cgz'
	export bootloader_append='root=/dev/ram0
user=lkp
job=/lkp/jobs/scheduled/lkp-bdw-de1/nvml-32G_4G-ext4-pmem-dax-1-pmem-ucode=0x7000019-debian-10.4-x86_64-20200603.cgz-20753096b67c9e841862c4f6f984aaac7dbe7183-20210912-78831-17xrnh2-1.yaml
ARCH=x86_64
kconfig=x86_64-rhel-8.3
branch=linux-review/Rongwei-Wang/mm-thp-fix-file-backed-THP-race-in-collapse_file/20210906-201318
commit=20753096b67c9e841862c4f6f984aaac7dbe7183
BOOT_IMAGE=/pkg/linux/x86_64-rhel-8.3/gcc-9/20753096b67c9e841862c4f6f984aaac7dbe7183/vmlinuz-5.14.0-09688-g20753096b67c
memmap=32G!4G
max_uptime=2100
RESULT_ROOT=/result/nvml/32G_4G-ext4-pmem-dax-1-pmem-ucode=0x7000019/lkp-bdw-de1/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/20753096b67c9e841862c4f6f984aaac7dbe7183/4
LKP_SERVER=internal-lkp-server
nokaslr
selinux=0
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
net.ifnames=0
printk.devkmsg=on
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
drbd.minor_count=8
earlyprintk=ttyS0,115200
systemd.log_level=err
console=ttyS0,115200
console=tty0
rw'
	export modules_initrd='/pkg/linux/x86_64-rhel-8.3/gcc-9/20753096b67c9e841862c4f6f984aaac7dbe7183/modules.cgz'
	export bm_initrd='/osimage/deps/debian-10.4-x86_64-20200603.cgz/run-ipconfig_20200608.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/lkp_20210707.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/rsync-rootfs_20200608.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/nvml_20210827.cgz,/osimage/pkg/debian-10.4-x86_64-20200603.cgz/nvml-x86_64-ff6f0f125-1_20210908.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/fs_20200714.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/hw_20200715.cgz'
	export ucode_initrd='/osimage/ucode/intel-ucode-20210222.cgz'
	export lkp_initrd='/osimage/user/lkp/lkp-x86_64.cgz'
	export site='inn'
	export LKP_CGI_PORT=80
	export LKP_CIFS_PORT=139
	export last_kernel='5.14.0-wt-ath-14023-gc7aa3e90286e'
	export repeat_to=6
	export queue_at_least_once=1
	export kernel='/pkg/linux/x86_64-rhel-8.3/gcc-9/20753096b67c9e841862c4f6f984aaac7dbe7183/vmlinuz-5.14.0-09688-g20753096b67c'
	export dequeue_time='2021-09-12 12:30:31 +0800'
	export job_initrd='/lkp/jobs/scheduled/lkp-bdw-de1/nvml-32G_4G-ext4-pmem-dax-1-pmem-ucode=0x7000019-debian-10.4-x86_64-20200603.cgz-20753096b67c9e841862c4f6f984aaac7dbe7183-20210912-78831-17xrnh2-1.cgz'

	[ -n "$LKP_SRC" ] ||
	export LKP_SRC=/lkp/${user:-lkp}/src
}

run_job()
{
	echo $$ > $TMP/run-job.pid

	. $LKP_SRC/lib/http.sh
	. $LKP_SRC/lib/job.sh
	. $LKP_SRC/lib/env.sh

	export_top_env

	run_setup nr_pmem=1 $LKP_SRC/setup/disk

	run_setup fs='ext4' $LKP_SRC/setup/fs

	run_setup bp_memmap='32G!4G' $LKP_SRC/setup/boot_params

	run_monitor $LKP_SRC/monitors/wrapper kmsg
	run_monitor $LKP_SRC/monitors/wrapper heartbeat
	run_monitor $LKP_SRC/monitors/wrapper meminfo
	run_monitor $LKP_SRC/monitors/wrapper oom-killer
	run_monitor $LKP_SRC/monitors/plain/watchdog

	run_test $LKP_SRC/tests/wrapper nvml
}

extract_stats()
{
	export stats_part_begin=
	export stats_part_end=

	$LKP_SRC/stats/wrapper nvml
	$LKP_SRC/stats/wrapper kmsg
	$LKP_SRC/stats/wrapper meminfo

	$LKP_SRC/stats/wrapper time nvml.time
	$LKP_SRC/stats/wrapper dmesg
	$LKP_SRC/stats/wrapper kmsg
	$LKP_SRC/stats/wrapper last_state
	$LKP_SRC/stats/wrapper stderr
	$LKP_SRC/stats/wrapper time
}

"$@"

[-- Attachment #4: dmesg.xz --]
[-- Type: application/x-xz, Size: 34512 bytes --]

[-- Attachment #5: job.yaml --]
[-- Type: text/plain, Size: 4620 bytes --]

---
:#! jobs/nvml-dax.yaml:
suite: nvml
testcase: nvml
category: functional
branch: linux-devel/devel-hourly-20210911-083626
nvml:
test: pmem
group: pmem
disk:
  nr_pmem: 1
fs: ext4
mount_option: dax
boot_params:
  bp_memmap: 32G!4G
job_origin: nvml-dax.yaml
:#! queue options:
queue_cmdline_keys:
- branch
- commit
queue: bisect
testbox: lkp-bdw-de1
tbox_group: lkp-bdw-de1
kconfig: x86_64-rhel-8.3
submit_id: 613d6745ced5342f55ace54d
job_file: "/lkp/jobs/scheduled/lkp-bdw-de1/nvml-32G_4G-ext4-pmem-dax-1-pmem-ucode=0x7000019-debian-10.4-x86_64-20200603.cgz-20753096b67c9e841862c4f6f984aaac7dbe7183-20210912-77653-1x4r1ty-0.yaml"
id: 1196c188b397c32b0a10fdc6011fb071ed95cefe
queuer_version: "/lkp-src"
:#! hosts/lkp-bdw-de1:
model: Broadwell-DE
nr_node: 1
nr_cpu: 16
memory: 48G
nr_hdd_partitions: 1
nr_ssd_partitions: 1
ssd_partitions: "/dev/disk/by-id/ata-INTEL_SSDSC2BA800G4_BTHV410402GY800OGN-part2"
hdd_partitions: "/dev/disk/by-id/ata-ST9500620NS_9XF26EB5-part1"
swap_partitions:
rootfs_partition: "/dev/disk/by-id/ata-INTEL_SSDSC2BA800G4_BTHV410402GY800OGN-part1"
brand: Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz
:#! include/category/functional:
kmsg:
heartbeat:
meminfo:
:#! include/nvml:
need_kconfig:
- NVDIMM_PFN: y
- FS_DAX: y
- LIBNVDIMM
- BTT
- BLK_DEV_PMEM
- X86_PMEM_LEGACY
- EXT4_FS
:#! include/disk/nr_pmem:
:#! include/fs/OTHERS:
:#! include/queue/cyclic:
commit: 20753096b67c9e841862c4f6f984aaac7dbe7183
:#! include/testbox/lkp-bdw-de1:
ucode: '0x7000019'
need_kconfig_hw:
- IGB: y
- NETDEVICES: y
- ETHERNET: y
- NET_VENDOR_INTEL: y
- PCI: y
- SATA_AHCI
- SATA_AHCI_PLATFORM
- ATA
- HAS_DMA: y
bisect_dmesg: true
enqueue_time: 2021-09-12 10:34:45.873902398 +08:00
_id: 613d6745ced5342f55ace54d
_rt: "/result/nvml/32G_4G-ext4-pmem-dax-1-pmem-ucode=0x7000019/lkp-bdw-de1/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/20753096b67c9e841862c4f6f984aaac7dbe7183"
:#! schedule options:
user: lkp
compiler: gcc-9
LKP_SERVER: internal-lkp-server
head_commit: f091780fe2ada36e127a108c2e5eb1edc9e22f3c
base_commit: 7d2a07b769330c34b4deabeed939325c77a7ec2f
rootfs: debian-10.4-x86_64-20200603.cgz
result_root: "/result/nvml/32G_4G-ext4-pmem-dax-1-pmem-ucode=0x7000019/lkp-bdw-de1/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/20753096b67c9e841862c4f6f984aaac7dbe7183/0"
scheduler_version: "/lkp/lkp/.src-20210910-192256"
arch: x86_64
max_uptime: 2100
initrd: "/osimage/debian/debian-10.4-x86_64-20200603.cgz"
bootloader_append:
- root=/dev/ram0
- user=lkp
- job=/lkp/jobs/scheduled/lkp-bdw-de1/nvml-32G_4G-ext4-pmem-dax-1-pmem-ucode=0x7000019-debian-10.4-x86_64-20200603.cgz-20753096b67c9e841862c4f6f984aaac7dbe7183-20210912-77653-1x4r1ty-0.yaml
- ARCH=x86_64
- kconfig=x86_64-rhel-8.3
- branch=linux-devel/devel-hourly-20210911-083626
- commit=20753096b67c9e841862c4f6f984aaac7dbe7183
- BOOT_IMAGE=/pkg/linux/x86_64-rhel-8.3/gcc-9/20753096b67c9e841862c4f6f984aaac7dbe7183/vmlinuz-5.14.0-09688-g20753096b67c
- memmap=32G!4G
- max_uptime=2100
- RESULT_ROOT=/result/nvml/32G_4G-ext4-pmem-dax-1-pmem-ucode=0x7000019/lkp-bdw-de1/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/20753096b67c9e841862c4f6f984aaac7dbe7183/0
- LKP_SERVER=internal-lkp-server
- nokaslr
- selinux=0
- debug
- apic=debug
- sysrq_always_enabled
- rcupdate.rcu_cpu_stall_timeout=100
- net.ifnames=0
- printk.devkmsg=on
- panic=-1
- softlockup_panic=1
- nmi_watchdog=panic
- oops=panic
- load_ramdisk=2
- prompt_ramdisk=0
- drbd.minor_count=8
- earlyprintk=ttyS0,115200
- systemd.log_level=err
- console=ttyS0,115200
- console=tty0
- rw
modules_initrd: "/pkg/linux/x86_64-rhel-8.3/gcc-9/20753096b67c9e841862c4f6f984aaac7dbe7183/modules.cgz"
bm_initrd: "/osimage/deps/debian-10.4-x86_64-20200603.cgz/run-ipconfig_20200608.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/lkp_20210707.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/rsync-rootfs_20200608.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/nvml_20210827.cgz,/osimage/pkg/debian-10.4-x86_64-20200603.cgz/nvml-x86_64-ff6f0f125-1_20210908.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/fs_20200714.cgz,/osimage/deps/debian-10.4-x86_64-20200603.cgz/hw_20200715.cgz"
ucode_initrd: "/osimage/ucode/intel-ucode-20210222.cgz"
lkp_initrd: "/osimage/user/lkp/lkp-x86_64.cgz"
site: inn
:#! /lkp/lkp/.src-20210910-192256/include/site/inn:
LKP_CGI_PORT: 80
LKP_CIFS_PORT: 139
oom-killer:
watchdog:
:#! runtime status:
last_kernel: 5.14.0-10561-ga5b9e22d8df7
:#! user overrides:
kernel: "/pkg/linux/x86_64-rhel-8.3/gcc-9/20753096b67c9e841862c4f6f984aaac7dbe7183/vmlinuz-5.14.0-09688-g20753096b67c"
dequeue_time: 2021-09-12 11:00:14.646859764 +08:00
job_state: running

^ permalink raw reply	[flat|nested] 61+ messages in thread

* [PATCH v2 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache
  2021-09-06 12:11 [PATCH 0/2] mm, thp: fix file-backed THP race in collapse_file Rongwei Wang
  2021-09-06 12:11 ` [PATCH 1/2] mm, thp: check page mapping when truncating page cache Rongwei Wang
  2021-09-06 12:12 ` [PATCH 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
@ 2021-09-22  7:06 ` Rongwei Wang
  2021-09-22  7:06 ` [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache Rongwei Wang
                   ` (3 subsequent siblings)
  6 siblings, 0 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-09-22  7:06 UTC (permalink / raw)
  To: linux-mm, linux-kernel
  Cc: akpm, cfijalkovich, willy, song, william.kucharski, hughd

Hi,
We found two bugs related to file-backed THP in our cases, recently.
The two bugs rough description as following:

1) in truncate_inode_pages_range, subpage(s) of file-backed THP can be
revealed by find_get_entry.

2) 'collapse_file' miss the pages which in writeback but no private.
This situation will be triggered in XFS when block size is set to
PAGESIZE.

These two patchs mainly fix the above mentioned bugs, and have been
tested in latest branch.

v1 -> v2:
- Patch "mm, thp: check page mapping when truncating page cache"
move the check of page mapping to behind lock_page
- Patch "mm, thp: bail out early in collapse_file for writeback page"
check the writeback flag before taking page lock.

v1 link:
https://patchwork.kernel.org/project/linux-mm/cover/20210906121200.57905-1-rongwei.wang@linux.alibaba.com/

Rongwei Wang (2):
  mm, thp: check page mapping when truncating page cache
  mm, thp: bail out early in collapse_file for writeback page

 mm/filemap.c    |  7 ++++++-
 mm/khugepaged.c |  7 ++++++-
 mm/truncate.c   | 17 ++++++++++++++++-
 3 files changed, 28 insertions(+), 3 deletions(-)

-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 61+ messages in thread

* [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-06 12:11 [PATCH 0/2] mm, thp: fix file-backed THP race in collapse_file Rongwei Wang
                   ` (2 preceding siblings ...)
  2021-09-22  7:06 ` [PATCH v2 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache Rongwei Wang
@ 2021-09-22  7:06 ` Rongwei Wang
  2021-09-22 11:37   ` Matthew Wilcox
  2021-09-22  7:06 ` [PATCH v2 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
                   ` (2 subsequent siblings)
  6 siblings, 1 reply; 61+ messages in thread
From: Rongwei Wang @ 2021-09-22  7:06 UTC (permalink / raw)
  To: linux-mm, linux-kernel
  Cc: akpm, cfijalkovich, willy, song, william.kucharski, hughd

Transparent huge page has supported read-only non-shmem files. The file-
backed THP is collapsed by khugepaged and truncated when written (for
shared libraries).

However, there is race in two possible places.

1) multiple writers truncate the same page cache concurrently;
2) collapse_file rolls back when writer truncates the page cache;

In both cases, subpage(s) of file THP can be revealed by find_get_entry
in truncate_inode_pages_range, which will trigger PageTail BUG_ON in
truncate_inode_page, as follows.

[40326.247034] page:000000009e420ff2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x7ff pfn:0x50c3ff
[40326.247041] head:0000000075ff816d order:9 compound_mapcount:0 compound_pincount:0
[40326.247046] flags: 0x37fffe0000010815(locked|uptodate|lru|arch_1|head)
[40326.247051] raw: 37fffe0000000000 fffffe0013108001 dead000000000122 dead000000000400
[40326.247053] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
[40326.247055] head: 37fffe0000010815 fffffe001066bd48 ffff000404183c20 0000000000000000
[40326.247057] head: 0000000000000600 0000000000000000 00000001ffffffff ffff000c0345a000
[40326.247058] page dumped because: VM_BUG_ON_PAGE(PageTail(page))
[40326.247077] ------------[ cut here ]------------
[40326.247080] kernel BUG at mm/truncate.c:213!
[40326.280581] Internal error: Oops - BUG: 0 [#1] SMP
[40326.281077] Modules linked in: xfs(E) libcrc32c(E) rfkill(E) ...
[40326.285130] CPU: 14 PID: 11394 Comm: check_madvise_d Kdump: ...
[40326.286202] Hardware name: ECS, BIOS 0.0.0 02/06/2015
[40326.286968] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
[40326.287584] pc : truncate_inode_page+0x64/0x70
[40326.288040] lr : truncate_inode_page+0x64/0x70
[40326.288498] sp : ffff80001b60b900
[40326.288837] x29: ffff80001b60b900 x28: 00000000000007ff
[40326.289377] x27: ffff80001b60b9a0 x26: 0000000000000000
[40326.289943] x25: 000000000000000f x24: ffff80001b60b9a0
[40326.290485] x23: ffff80001b60ba18 x22: ffff0001e0999ea8
[40326.291027] x21: ffff0000c21db300 x20: ffffffffffffffff
[40326.291566] x19: fffffe001310ffc0 x18: 0000000000000020
[40326.292106] x17: 0000000000000000 x16: 0000000000000000
[40326.292655] x15: ffff0000c21db960 x14: 3030306666666620
[40326.293197] x13: 6666666666666666 x12: 3130303030303030
[40326.293746] x11: ffff8000117b69b8 x10: 00000000ffff8000
[40326.294313] x9 : ffff80001012690c x8 : 0000000000000000
[40326.294851] x7 : ffff8000114f69b8 x6 : 0000000000017ffd
[40326.295392] x5 : ffff0007fffbcbc8 x4 : ffff80001b60b5c0
[40326.295942] x3 : 0000000000000001 x2 : 0000000000000000
[40326.296497] x1 : 0000000000000000 x0 : 0000000000000000
[40326.297047] Call trace:
[40326.297304]  truncate_inode_page+0x64/0x70
[40326.297724]  truncate_inode_pages_range+0x550/0x7e4
[40326.298251]  truncate_pagecache+0x58/0x80
[40326.298662]  do_dentry_open+0x1e4/0x3c0
[40326.299052]  vfs_open+0x38/0x44
[40326.299377]  do_open+0x1f0/0x310
[40326.299709]  path_openat+0x114/0x1dc
[40326.300077]  do_filp_open+0x84/0x134
[40326.300444]  do_sys_openat2+0xbc/0x164
[40326.300825]  __arm64_sys_openat+0x74/0xc0
[40326.301236]  el0_svc_common.constprop.0+0x88/0x220
[40326.301723]  do_el0_svc+0x30/0xa0
[40326.302089]  el0_svc+0x20/0x30
[40326.302404]  el0_sync_handler+0x1a4/0x1b0
[40326.302814]  el0_sync+0x180/0x1c0
[40326.303157] Code: aa0103e0 900061e1 910ec021 9400d300 (d4210000)
[40326.303775] ---[ end trace f70cdb42cb7c2d42 ]---
[40326.304244] Kernel panic - not syncing: Oops - BUG: Fatal exception

This checks the page mapping and retries when subpage of file THP is
found, in truncate_inode_pages_range.

Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
---
 mm/filemap.c  |  7 ++++++-
 mm/truncate.c | 17 ++++++++++++++++-
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index dae481293..a3af2ec 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2093,7 +2093,6 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
 		if (!xa_is_value(page)) {
 			if (page->index < start)
 				goto put;
-			VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
 			if (page->index + thp_nr_pages(page) - 1 > end)
 				goto put;
 			if (!trylock_page(page))
@@ -2102,6 +2101,12 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
 				goto unlock;
 			VM_BUG_ON_PAGE(!thp_contains(page, xas.xa_index),
 					page);
+			/*
+			 * We can find and get head page of file THP with
+			 * non-head index. The head page should have already
+			 * be truncated with page->mapping reset to NULL.
+			 */
+			VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
 		}
 		indices[pvec->nr] = xas.xa_index;
 		if (!pagevec_add(pvec, page))
diff --git a/mm/truncate.c b/mm/truncate.c
index 714eaf1..3f47190 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -319,7 +319,8 @@ void truncate_inode_pages_range(struct address_space *mapping,
 	index = start;
 	while (index < end && find_lock_entries(mapping, index, end - 1,
 			&pvec, indices)) {
-		index = indices[pagevec_count(&pvec) - 1] + 1;
+		index = indices[pagevec_count(&pvec) - 1] +
+			thp_nr_pages(pvec.pages[pagevec_count(&pvec) - 1]);
 		truncate_exceptional_pvec_entries(mapping, &pvec, indices);
 		for (i = 0; i < pagevec_count(&pvec); i++)
 			truncate_cleanup_page(pvec.pages[i]);
@@ -392,6 +393,20 @@ void truncate_inode_pages_range(struct address_space *mapping,
 				continue;
 
 			lock_page(page);
+			/*
+			 * Already truncated? We can find and get subpage
+			 * of file THP, of which the head page is truncated.
+			 *
+			 * In addition, another race will be avoided, where
+			 * collapse_file rolls back when writer truncates the
+			 * page cache.
+			 */
+			if (page_mapping(page) != mapping) {
+				unlock_page(page);
+				/* Restart to make sure all gone */
+				index = start - 1;
+				break;
+			}
 			WARN_ON(page_to_index(page) != index);
 			wait_on_page_writeback(page);
 			truncate_inode_page(mapping, page);
-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 61+ messages in thread

* [PATCH v2 2/2] mm, thp: bail out early in collapse_file for writeback page
  2021-09-06 12:11 [PATCH 0/2] mm, thp: fix file-backed THP race in collapse_file Rongwei Wang
                   ` (3 preceding siblings ...)
  2021-09-22  7:06 ` [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache Rongwei Wang
@ 2021-09-22  7:06 ` Rongwei Wang
  2021-10-06  2:18 ` [PATCH v3 v3 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache Rongwei Wang
  2021-10-11  2:22 ` [PATCH v4 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache Rongwei Wang
  6 siblings, 0 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-09-22  7:06 UTC (permalink / raw)
  To: linux-mm, linux-kernel
  Cc: akpm, cfijalkovich, willy, song, william.kucharski, hughd

Currently collapse_file does not explicitly check PG_writeback, instead,
page_has_private and try_to_release_page are used to filter writeback
pages. This does not work for xfs with blocksize equal to or larger
than pagesize, because in such case xfs has no page->private.

This makes collapse_file bail out early for writeback page. Otherwise,
xfs end_page_writeback will panic as follows.

[ 6411.448211] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:ffff0003f88c86a8 index:0x0 pfn:0x84ef32
[ 6411.448304] aops:xfs_address_space_operations [xfs] ino:30000b7 dentry name:"libtest.so"
[ 6411.448312] flags: 0x57fffe0000008027(locked|referenced|uptodate|active|writeback)
[ 6411.448317] raw: 57fffe0000008027 ffff80001b48bc28 ffff80001b48bc28 ffff0003f88c86a8
[ 6411.448321] raw: 0000000000000000 0000000000000000 00000000ffffffff ffff0000c3e9a000
[ 6411.448324] page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u <= 127u))
[ 6411.448327] page->mem_cgroup:ffff0000c3e9a000
[ 6411.448340] ------------[ cut here ]------------
[ 6411.448343] kernel BUG at include/linux/mm.h:1212!
[ 6411.449288] Internal error: Oops - BUG: 0 [#1] SMP
[ 6411.449786] Modules linked in:
[ 6411.449790] BUG: Bad page state in process khugepaged  pfn:84ef32
[ 6411.450143]  xfs(E)
[ 6411.450459] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:0 index:0x0 pfn:0x84ef32
[ 6411.451361]  libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) ...
[ 6411.451387] CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Tainted: ...
[ 6411.451389] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
[ 6411.451393] pc : end_page_writeback+0x1c0/0x214
[ 6411.451394] lr : end_page_writeback+0x1c0/0x214
[ 6411.451395] sp : ffff800011ce3cc0
[ 6411.451396] x29: ffff800011ce3cc0 x28: 0000000000000000
[ 6411.451398] x27: ffff000c04608040 x26: 0000000000000000
[ 6411.451399] x25: ffff000c04608040 x24: 0000000000001000
[ 6411.451401] x23: ffff0003f88c8530 x22: 0000000000001000
[ 6411.451403] x21: ffff0003f88c8530 x20: 0000000000000000
[ 6411.451404] x19: fffffe00201bcc80 x18: 0000000000000030
[ 6411.451406] x17: 0000000000000000 x16: 0000000000000000
[ 6411.451407] x15: ffff000c018f9760 x14: ffffffffffffffff
[ 6411.451409] x13: ffff8000119d72b0 x12: ffff8000119d6ee3
[ 6411.451410] x11: ffff8000117b69b8 x10: 00000000ffff8000
[ 6411.451412] x9 : ffff800010617534 x8 : 0000000000000000
[ 6411.451413] x7 : ffff8000114f69b8 x6 : 000000000000000f
[ 6411.451415] x5 : 0000000000000000 x4 : 0000000000000000
[ 6411.451416] x3 : 0000000000000400 x2 : 0000000000000000
[ 6411.451418] x1 : 0000000000000000 x0 : 0000000000000000
[ 6411.451420] Call trace:
[ 6411.451421]  end_page_writeback+0x1c0/0x214
[ 6411.451424]  iomap_finish_page_writeback+0x13c/0x204
[ 6411.451425]  iomap_finish_ioend+0xe8/0x19c
[ 6411.451426]  iomap_writepage_end_bio+0x38/0x50
[ 6411.451427]  bio_endio+0x168/0x1ec
[ 6411.451430]  blk_update_request+0x278/0x3f0
[ 6411.451432]  blk_mq_end_request+0x34/0x15c
[ 6411.451435]  virtblk_request_done+0x38/0x74 [virtio_blk]
[ 6411.451437]  blk_done_softirq+0xc4/0x110
[ 6411.451439]  __do_softirq+0x128/0x38c
[ 6411.451441]  __irq_exit_rcu+0x118/0x150
[ 6411.451442]  irq_exit+0x1c/0x30
[ 6411.451445]  __handle_domain_irq+0x8c/0xf0
[ 6411.451446]  gic_handle_irq+0x84/0x108
[ 6411.451447]  el1_irq+0xcc/0x180
[ 6411.451448]  arch_cpu_idle+0x18/0x40
[ 6411.451450]  default_idle_call+0x4c/0x1a0
[ 6411.451453]  cpuidle_idle_call+0x168/0x1e0
[ 6411.451454]  do_idle+0xb4/0x104
[ 6411.451455]  cpu_startup_entry+0x30/0x9c
[ 6411.451458]  secondary_start_kernel+0x104/0x180
[ 6411.451460] Code: d4210000 b0006161 910c8021 94013f4d (d4210000)
[ 6411.451462] ---[ end trace 4a88c6a074082f8c ]---
[ 6411.451464] Kernel panic - not syncing: Oops - BUG: Fatal exception in interrupt

Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
---
 mm/khugepaged.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 045cc57..48de4e1 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -1763,6 +1763,10 @@ static void collapse_file(struct mm_struct *mm,
 				filemap_flush(mapping);
 				result = SCAN_FAIL;
 				goto xa_unlocked;
+			} else if (PageWriteback(page)) {
+				xas_unlock_irq(&xas);
+				result = SCAN_FAIL;
+				goto xa_unlocked;
 			} else if (trylock_page(page)) {
 				get_page(page);
 				xas_unlock_irq(&xas);
@@ -1798,7 +1802,8 @@ static void collapse_file(struct mm_struct *mm,
 			goto out_unlock;
 		}
 
-		if (!is_shmem && PageDirty(page)) {
+		if (!is_shmem && (PageDirty(page) ||
+				  PageWriteback(page))) {
 			/*
 			 * khugepaged only works on read-only fd, so this
 			 * page is dirty because it hasn't been flushed
-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-22  7:06 ` [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache Rongwei Wang
@ 2021-09-22 11:37   ` Matthew Wilcox
  2021-09-22 17:04     ` Rongwei Wang
  0 siblings, 1 reply; 61+ messages in thread
From: Matthew Wilcox @ 2021-09-22 11:37 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: linux-mm, linux-kernel, akpm, cfijalkovich, song,
	william.kucharski, hughd

On Wed, Sep 22, 2021 at 03:06:44PM +0800, Rongwei Wang wrote:
> Transparent huge page has supported read-only non-shmem files. The file-
> backed THP is collapsed by khugepaged and truncated when written (for
> shared libraries).
> 
> However, there is race in two possible places.
> 
> 1) multiple writers truncate the same page cache concurrently;
> 2) collapse_file rolls back when writer truncates the page cache;

As I've said before, the bug here is that somehow there is a writable fd
to a file with THPs.  That's what we need to track down and fix.

https://lore.kernel.org/linux-mm/YUdL3lFLFHzC80Wt@casper.infradead.org/


^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-22 11:37   ` Matthew Wilcox
@ 2021-09-22 17:04     ` Rongwei Wang
  2021-09-24  2:43       ` Andrew Morton
  0 siblings, 1 reply; 61+ messages in thread
From: Rongwei Wang @ 2021-09-22 17:04 UTC (permalink / raw)
  To: Matthew Wilcox
  Cc: Linux MM, Linux Kernel Mailing List, Andrew Morton, song,
	william.kucharski, Hugh Dickins



> On Sep 22, 2021, at 7:37 PM, Matthew Wilcox <willy@infradead.org> wrote:
> 
> On Wed, Sep 22, 2021 at 03:06:44PM +0800, Rongwei Wang wrote:
>> Transparent huge page has supported read-only non-shmem files. The file-
>> backed THP is collapsed by khugepaged and truncated when written (for
>> shared libraries).
>> 
>> However, there is race in two possible places.
>> 
>> 1) multiple writers truncate the same page cache concurrently;
>> 2) collapse_file rolls back when writer truncates the page cache;
> 
> As I've said before, the bug here is that somehow there is a writable fd
> to a file with THPs.  That's what we need to track down and fix.
Hi, Matthew
I am not sure get your means. We know “mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs"
Introduced file-backed THPs for DSO. It is possible {very rarely} for DSO to be opened in writeable way. So, the
Pagecache of DSO need to be cleaned when someone opened this DSO in a writeable way. The process of
Pagecache cleaned mainly refers to ’truncate_inode_pages_range’.

Of course, the above is consensus for us.

The ’somehow’ that your said is sure for us. Maybe I can try to describe roughly here:

In collapse_file <khugepaged>, when PTEs scan failed (e.g. SCAN_FAIL, SCAN_TRUNCATED..), the following
code will be run:

        } else {
                struct page *page;

                /* Something went wrong: roll back page cache changes */
                xas_lock_irq(&xas);
                mapping->nrpages -= nr_none;

                if (is_shmem)
                        shmem_uncharge(mapping->host, nr_none);

                xas_set(&xas, start);
                xas_for_each(&xas, page, end - 1) {
                        page = list_first_entry_or_null(&pagelist,
                                        struct page, lru);
                        if (!page || xas.xa_index < page->index) {
                                if (!nr_none)
                                        break;
                                nr_none--;
                                /* Put holes back where they were */
                                xas_store(&xas, NULL);
                                continue;
                        }

                        VM_BUG_ON_PAGE(page->index != xas.xa_index, page);

                        /* Unfreeze the page. */
                        list_del(&page->lru);
                        page_ref_unfreeze(page, 2);
  line1               xas_store(&xas, page);
                        xas_pause(&xas);
                        xas_unlock_irq(&xas);
                        unlock_page(page);
                        putback_lru_page(page);
                        xas_lock_irq(&xas);
                }
		….
		new_page->mapping = NULL;
	   }
line2   unlock_page(new_page);
---

The above code refers to roll back. When someone starts open a DSO in a writeable way, and the collapse_file
is scanning PTEs. The hugepage had been locked and was mapped in page cache before line1. And the hugepage
not be in pagecache and be unlocked at line2. The race that between ‘collapse_file’ and ’truncate_inode_pages_range’
will happen when ‘collapse_file' is executing line1 and line2. 
This race can be shown concisely:

Khugepaged:                                                writer
Collapse_file:                                                truncate_inode_pages_range

lock_page(hugepage)                                   skip hugepage because locked by others

					                              scan_left_pages() and wait_lock_page(hugepage)
scan_fail() & xas_store(&xas, 4k_page)

unlock_page(hugepage)
						                      get_lock_page(hugepage)
						                      hugepage is not in pagecache here, but not be checked

This situation triggers easily if we setting a very small ‘scan_sleep_millisecs’.

The above descriptions are roughly my understanding of ’somehow’. It says a lot of nonsense, maybe it helps!
> 
> https://lore.kernel.org/linux-mm/YUdL3lFLFHzC80Wt@casper.infradead.org/
All in all, what you mean is that we should solve this race at the source? However, a writer happens to appear in the middle
of a process in ‘collapse_file', so this bug solved when roll back. The above is my understanding, but it may be
wrong.

Thanks


^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-22 17:04     ` Rongwei Wang
@ 2021-09-24  2:43       ` Andrew Morton
  2021-09-24  3:08         ` Yang Shi
                           ` (2 more replies)
  0 siblings, 3 replies; 61+ messages in thread
From: Andrew Morton @ 2021-09-24  2:43 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: Matthew Wilcox, Linux MM, Linux Kernel Mailing List, song,
	william.kucharski, Hugh Dickins

On Thu, 23 Sep 2021 01:04:54 +0800 Rongwei Wang <rongwei.wang@linux.alibaba.com> wrote:

> 
> 
> > On Sep 22, 2021, at 7:37 PM, Matthew Wilcox <willy@infradead.org> wrote:
> > 
> > On Wed, Sep 22, 2021 at 03:06:44PM +0800, Rongwei Wang wrote:
> >> Transparent huge page has supported read-only non-shmem files. The file-
> >> backed THP is collapsed by khugepaged and truncated when written (for
> >> shared libraries).
> >> 
> >> However, there is race in two possible places.
> >> 
> >> 1) multiple writers truncate the same page cache concurrently;
> >> 2) collapse_file rolls back when writer truncates the page cache;
> > 
> > As I've said before, the bug here is that somehow there is a writable fd
> > to a file with THPs.  That's what we need to track down and fix.
> Hi, Matthew
> I am not sure get your means. We know “mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs"
> Introduced file-backed THPs for DSO. It is possible {very rarely} for DSO to be opened in writeable way.
>
> ...
>
> > https://lore.kernel.org/linux-mm/YUdL3lFLFHzC80Wt@casper.infradead.org/
> All in all, what you mean is that we should solve this race at the source?

Matthew is being pretty clear here: we shouldn't be permitting
userspace to get a writeable fd for a thp-backed file.

Why are we permitting the DSO to be opened writeably?  If there's a
legitimate case for doing this then presumably "mm, thp: relax the
VM_DENYWRITE constraint on file-backed THPs: should be fixed or
reverted.

If there is no legitimate use case for returning a writeable fd for a
thp-backed file then we should fail such an attempt at open().  This
approach has back-compatibility issues which need to be thought about. 
Perhaps we should permit the open-writeably attempt to appear to
succeed, but to really return a read-only fd?


^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-24  2:43       ` Andrew Morton
@ 2021-09-24  3:08         ` Yang Shi
  2021-09-24  3:35         ` Rongwei Wang
  2021-09-24  7:12         ` Rongwei Wang
  2 siblings, 0 replies; 61+ messages in thread
From: Yang Shi @ 2021-09-24  3:08 UTC (permalink / raw)
  To: Andrew Morton
  Cc: Rongwei Wang, Matthew Wilcox, Linux MM,
	Linux Kernel Mailing List, song, william.kucharski, Hugh Dickins

On Thu, Sep 23, 2021 at 7:43 PM Andrew Morton <akpm@linux-foundation.org> wrote:
>
> On Thu, 23 Sep 2021 01:04:54 +0800 Rongwei Wang <rongwei.wang@linux.alibaba.com> wrote:
>
> >
> >
> > > On Sep 22, 2021, at 7:37 PM, Matthew Wilcox <willy@infradead.org> wrote:
> > >
> > > On Wed, Sep 22, 2021 at 03:06:44PM +0800, Rongwei Wang wrote:
> > >> Transparent huge page has supported read-only non-shmem files. The file-
> > >> backed THP is collapsed by khugepaged and truncated when written (for
> > >> shared libraries).
> > >>
> > >> However, there is race in two possible places.
> > >>
> > >> 1) multiple writers truncate the same page cache concurrently;
> > >> 2) collapse_file rolls back when writer truncates the page cache;
> > >
> > > As I've said before, the bug here is that somehow there is a writable fd
> > > to a file with THPs.  That's what we need to track down and fix.
> > Hi, Matthew
> > I am not sure get your means. We know “mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs"
> > Introduced file-backed THPs for DSO. It is possible {very rarely} for DSO to be opened in writeable way.
> >
> > ...
> >
> > > https://lore.kernel.org/linux-mm/YUdL3lFLFHzC80Wt@casper.infradead.org/
> > All in all, what you mean is that we should solve this race at the source?
>
> Matthew is being pretty clear here: we shouldn't be permitting
> userspace to get a writeable fd for a thp-backed file.

No, he doesn't mean it IIRC. Actually we had the same conversation for
another patch. Quoted below:

" > > Things have already gone wrong before we get to this point.  See
> > do_dentry_open().  You aren't supposed to be able to get a writable file
> > descriptor on a file which has had huge pages added to the page cache
> > without the filesystem's knowledge.  That's the problem that needs to
> > be fixed.
>
> I don't quite understand your point here. Do you mean do_dentry_open()
> should fail for such cases instead of truncating the page cache?

No, do_dentry_open() should have truncated the page cache when it was
called and found that there were THPs in the cache.  Then khugepaged
should see that someone has the file open for write and decline to create
new THPs.  So it shouldn't be possible to get here with THPs in the cache."

Please see https://lore.kernel.org/linux-mm/YUkCI2I085Sos%2F64@casper.infradead.org/

But actually "mm, thp: relax the VM_DENYWRITE constraint on
file-backed THPs" did so exactly.

>
> Why are we permitting the DSO to be opened writeably?  If there's a
> legitimate case for doing this then presumably "mm, thp: relax the
> VM_DENYWRITE constraint on file-backed THPs: should be fixed or
> reverted.

Unfortunately we can't revert this commit anymore since VM_DENYWRITE
is gone due to commit 8d0920bde5eb ("mm: remove VM_DENYWRITE")

>
> If there is no legitimate use case for returning a writeable fd for a
> thp-backed file then we should fail such an attempt at open().  This
> approach has back-compatibility issues which need to be thought about.
> Perhaps we should permit the open-writeably attempt to appear to
> succeed, but to really return a read-only fd?
>
>

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-24  2:43       ` Andrew Morton
  2021-09-24  3:08         ` Yang Shi
@ 2021-09-24  3:35         ` Rongwei Wang
  2021-09-24  7:12         ` Rongwei Wang
  2 siblings, 0 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-09-24  3:35 UTC (permalink / raw)
  To: Andrew Morton
  Cc: Matthew Wilcox, Linux MM, Linux Kernel Mailing List, song,
	william.kucharski, Hugh Dickins


On 9/24/21 10:43 AM, Andrew Morton wrote:
> On Thu, 23 Sep 2021 01:04:54 +0800 Rongwei Wang <rongwei.wang@linux.alibaba.com> wrote:
>
>>
>>> On Sep 22, 2021, at 7:37 PM, Matthew Wilcox <willy@infradead.org> wrote:
>>>
>>> On Wed, Sep 22, 2021 at 03:06:44PM +0800, Rongwei Wang wrote:
>>>> Transparent huge page has supported read-only non-shmem files. The file-
>>>> backed THP is collapsed by khugepaged and truncated when written (for
>>>> shared libraries).
>>>>
>>>> However, there is race in two possible places.
>>>>
>>>> 1) multiple writers truncate the same page cache concurrently;
>>>> 2) collapse_file rolls back when writer truncates the page cache;
>>> As I've said before, the bug here is that somehow there is a writable fd
>>> to a file with THPs.  That's what we need to track down and fix.
>> Hi, Matthew
>> I am not sure get your means. We know “mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs"
>> Introduced file-backed THPs for DSO. It is possible {very rarely} for DSO to be opened in writeable way.
>>
>> ...
>>
>>> https://lore.kernel.org/linux-mm/YUdL3lFLFHzC80Wt@casper.infradead.org/
>> All in all, what you mean is that we should solve this race at the source?
> Matthew is being pretty clear here: we shouldn't be permitting
> userspace to get a writeable fd for a thp-backed file.
>
> Why are we permitting the DSO to be opened writeably?  If there's a
> legitimate case for doing this then presumably "mm, thp: relax the

Hi, we have written a user case to trigger this race mentioned above. 
this case just create one reader

to open DSO in RDONLY mode, and keep making the mapping page of DSO use 
huge pages by madvise,

then multiple writer to open and write the same DSO.

I will send it later after simple adjust.

Thanks

> VM_DENYWRITE constraint on file-backed THPs: should be fixed or
> reverted.
>
> If there is no legitimate use case for returning a writeable fd for a
> thp-backed file then we should fail such an attempt at open().  This
> approach has back-compatibility issues which need to be thought about.
> Perhaps we should permit the open-writeably attempt to appear to
> succeed, but to really return a read-only fd?

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-24  2:43       ` Andrew Morton
  2021-09-24  3:08         ` Yang Shi
  2021-09-24  3:35         ` Rongwei Wang
@ 2021-09-24  7:12         ` Rongwei Wang
  2021-09-27 22:24           ` Song Liu
  2 siblings, 1 reply; 61+ messages in thread
From: Rongwei Wang @ 2021-09-24  7:12 UTC (permalink / raw)
  To: Andrew Morton
  Cc: Matthew Wilcox, Linux MM, Linux Kernel Mailing List, song,
	william.kucharski, Hugh Dickins

[-- Attachment #1: Type: text/plain, Size: 2523 bytes --]



On 9/24/21 10:43 AM, Andrew Morton wrote:
> On Thu, 23 Sep 2021 01:04:54 +0800 Rongwei Wang <rongwei.wang@linux.alibaba.com> wrote:
> 
>>
>>
>>> On Sep 22, 2021, at 7:37 PM, Matthew Wilcox <willy@infradead.org> wrote:
>>>
>>> On Wed, Sep 22, 2021 at 03:06:44PM +0800, Rongwei Wang wrote:
>>>> Transparent huge page has supported read-only non-shmem files. The file-
>>>> backed THP is collapsed by khugepaged and truncated when written (for
>>>> shared libraries).
>>>>
>>>> However, there is race in two possible places.
>>>>
>>>> 1) multiple writers truncate the same page cache concurrently;
>>>> 2) collapse_file rolls back when writer truncates the page cache;
>>>
>>> As I've said before, the bug here is that somehow there is a writable fd
>>> to a file with THPs.  That's what we need to track down and fix.
>> Hi, Matthew
>> I am not sure get your means. We know “mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs"
>> Introduced file-backed THPs for DSO. It is possible {very rarely} for DSO to be opened in writeable way.
>>
>> ...
>>
>>> https://lore.kernel.org/linux-mm/YUdL3lFLFHzC80Wt@casper.infradead.org/
>> All in all, what you mean is that we should solve this race at the source?
> 
> Matthew is being pretty clear here: we shouldn't be permitting
> userspace to get a writeable fd for a thp-backed file.
> 
> Why are we permitting the DSO to be opened writeably?  If there's a
> legitimate case for doing this then presumably "mm, thp: relax the
There is a use case to stress file-backed THP within attachment.
I test this case in a system which has enabled CONFIG_READ_ONLY_THP_FOR_FS:

$ gcc -Wall -g -o stress_madvise_dso stress_madvise_dso.c
$ ulimit -s unlimited
$ ./stress_madvise_dso 10000 <libtest.so>

the meaning of above parameters:
10000: the max test time;
<libtest.so>: the DSO that will been mapped into file-backed THP by 
madvise. It recommended that the text segment of DSO to be tested is 
greater than 2M.

The crash will been triggered at once in the latest kernel. And this
case also can used to trigger the bug that mentioned in our another patch.

> VM_DENYWRITE constraint on file-backed THPs: should be fixed or
> reverted.
> 
> If there is no legitimate use case for returning a writeable fd for a
> thp-backed file then we should fail such an attempt at open().  This
> approach has back-compatibility issues which need to be thought about.
> Perhaps we should permit the open-writeably attempt to appear to
> succeed, but to really return a read-only fd?
> 

[-- Attachment #2: stress_madvise_dso.c --]
[-- Type: text/plain, Size: 6957 bytes --]

/*
 * case: stress file-backed THP
 */
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include <assert.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <sched.h>
#include <time.h>
#include <string.h>
#include <fcntl.h>
#include <signal.h> /* for signal */
#include <sys/mman.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <errno.h>

#define PATH_MAX	1024
#define BUFF_MAX	1024
#define TIME_DFL	180	/* seconds */

void signal_handler(int signo)
{
	/* Restore env */
	system("echo never > /sys/kernel/mm/transparent_hugepage/enabled");
	system("echo 10000 > /sys/kernel/mm/transparent_hugepage/khugepaged/scan_sleep_millisecs");

	printf("\nrestore env:\n");
	printf("	echo never > /sys/kernel/mm/transparent_hugepage/enabled\n");
	printf("	echo 10000 > /sys/kernel/mm/transparent_hugepage/khugepaged/scan_sleep_millisecs\n");
	exit(-1);
}

/* in KB */
#define text_size	(14UL << 10)

#define PROCMAP_SZ	8
struct procmap {
	uint64_t vm_start;
	uint64_t vm_end;
	uint64_t pgoff;
	uint32_t maj;
	uint32_t min;
	uint32_t ino;
#define PROT_SZ		5
	char     prot[PROT_SZ];
	char     fname[PATH_MAX];
};

unsigned long sleep_secs = 0;

/*
 * Routines of procmap, i.e., /proc/pid/(s)maps
 */
static int get_memory_map(pid_t pid, struct procmap *procmap,
		const char *fname)
{
	char path[PATH_MAX];
	char line[BUFF_MAX];
	FILE *fp = NULL;
	char *end = NULL;
	char *pos, *sp = NULL, *in[PROCMAP_SZ];
	char dlm[] = "-   :   ";
	uint64_t counter;
	int i;

	snprintf(path, PATH_MAX, "/proc/%u/maps", pid);

	fp = fopen(path, "r");
	if (fp == NULL) {
		printf("fopen: %s: %s\n", path, strerror(errno));
		return -1;
	}

	if (procmap == NULL || fname == NULL) {
		perror("fail: procmap or fname is NULL");
		goto failed;
	}

	while (fgets(line, BUFF_MAX, fp)) {
		/* Split line into fields */
		pos = line;
		for (i = 0; i < PROCMAP_SZ; i++) {
			in[i] = strtok_r(pos, &dlm[i], &sp);
			if (in[i] == NULL)
				break;
			pos = NULL;
		}

		/* Check this line is procmap item header */
		if (i != PROCMAP_SZ)
			continue;

		memcpy(procmap->prot, in[2], PROT_SZ);
		memcpy(procmap->fname, in[7], PATH_MAX);

		/* Find the target entry */
		if (strcmp(procmap->prot, "r-xp") ||
				!strstr(procmap->fname, fname))
			continue;

		/* Convert/Copy each field as needed */
		errno = 0;
		procmap->vm_start = strtoull(in[0], &end, 16);
		if ((in[0] == '\0') || (end == NULL) || (*end != '\0') ||
				(errno != 0))
			goto failed;

		procmap->vm_end = strtoull(in[1], &end, 16);
		if ((in[1] == '\0') || (end == NULL) || (*end != '\0') ||
				(errno != 0))
			goto failed;

		procmap->pgoff = strtoull(in[3], &end, 16);
		if ((in[3] == '\0') || (end == NULL) || (*end != '\0') ||
				(errno != 0))
			goto failed;

		procmap->ino = strtoul(in[6], &end, 16);
		if ((in[6] == '\0') || (end == NULL) || (*end != '\0') ||
				(errno != 0))
			goto failed;
	}

	if (fp)
		fclose(fp);
	return 0;

failed:
	if (fp)
		fclose(fp);
	printf("fail: exit\n");

	return -1;
}

#define NR_CPU 32
uint64_t gettimeofday_sec(void);
inline uint64_t gettimeofday_sec(void)
{
	struct timeval tv;

	gettimeofday(&tv, NULL);
	return tv.tv_sec;
}

void thread_read(int cpu, char *args)
{
	int fd;
	char *dso_path = args;
	char buf[0x800000];
	struct procmap maps;
	pid_t pid = getpid();

	cpu_set_t mask;
	CPU_ZERO(&mask);
	CPU_SET(cpu, &mask);
	if (sched_setaffinity(0, sizeof(cpu_set_t), &mask) == -1) {
		printf("warning: can not set CPU affinity\n");
	}

	printf("read %s\n", dso_path);
	fd = open(dso_path, O_RDONLY);
	/* The start addr must be alignment with 2M */
	void *p = mmap((void *)0x40000dc00000UL, 0x800000, PROT_READ | PROT_EXEC,
			MAP_PRIVATE, fd, 0);
	if (p == MAP_FAILED) {
		perror("mmap");
		goto out;
	}

	/* get the mapping address (ONLY r-xp) of the DSO */
	get_memory_map(pid, &maps, dso_path);
	printf("pid: %d\n", pid);
	printf("text vm_start: 0x%lx\n", maps.vm_start);
	printf("text vm_end: 0x%lx\n", maps.vm_end);
	madvise((void *)maps.vm_start, maps.vm_end - maps.vm_start, MADV_HUGEPAGE);
	lseek(fd, 0, SEEK_SET);
	for(;;) {
		memcpy(buf, p, 0x800000 - 1);
		sleep(1);
	}

	sleep(100);

out:
	/* Restore env */
	system("echo never > /sys/kernel/mm/transparent_hugepage/enabled");
	system("echo 10000 > /sys/kernel/mm/transparent_hugepage/khugepaged/scan_sleep_millisecs");

	printf("read exit %s\n", dso_path);
}

void thread_write(int cpu, char *args)
{
	void *p = NULL;
	char buf[32];
	uint64_t sec = 1;
	uint64_t count = 0;
	char *dso_path = args;

	cpu_set_t mask;
	CPU_ZERO(&mask);
	CPU_SET(cpu, &mask);
	if (sched_setaffinity(0, sizeof(cpu_set_t), &mask) == -1) {
		printf("warning: can not set CPU affinity\n");
	}

	sleep(3);
	printf("write %s\n", dso_path);
	for (;;) {
		sec = gettimeofday_sec();
		while ((sec % 10) >= 3) {
			sec = gettimeofday_sec();
		}

		int fd = open(dso_path, O_RDWR);
		p = mmap(NULL, 0x800000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
		if (p == MAP_FAILED) {
			perror("mmap");
			goto out; /* fail */
		}

		lseek(fd, 0x1600, SEEK_SET);
		for(long i=1; i <= 2; i++){
			memcpy(p + 0x10, buf, 16);
		}

		munmap(p, 0x800000);
		close(fd);

		sleep(2);
		count++;
		if (count >= sleep_secs) {
			printf("test finish: %ld\n", count);
			break;
		}
	} /* end for */

out:
	printf("write exit %s\n", dso_path);
}

/*
 * usage:
 *		stress_madvise_dso <test time> <libtest.so>
 */
int main(int argc, char *argv[])
{
	struct timeval start, end;
	char dso_path[80];
	int ret = 0;
	pid_t pid;

	if (argc > 2) {
		sleep_secs = strtoul(argv[1], NULL, 10);
		realpath(argv[2], dso_path);
	}
	else {
		printf("usage error:\n"\
				"	stress_madvise_dso <test time> <libtest.so>\n"\
				"	e.g. stress_madvise_dso 10000 libtest.so\n");
		exit(-1);
	}

	/* Set env */
	system("ulimit -s unlimited");
	system("echo madvise > /sys/kernel/mm/transparent_hugepage/enabled");
	system("echo 1000 > /sys/kernel/mm/transparent_hugepage/khugepaged/scan_sleep_millisecs");

	gettimeofday(&start, NULL);

	/*
	 * fork 32 task to read and write the same DSO:
	 *		task 0: read dso;
	 *		task 1 - 31: write dso;
	 */
	for (int i = 0; i < NR_CPU; ++i) {
		pid = fork();
		if (pid == 0) {
			if (i == 0)
				thread_read(i, dso_path);
			else
				thread_write(i, dso_path);
			break; /* forbid child fork */
		}
		else {
			/* parent */
		}
	}

	if (pid != 0) {
		signal(SIGINT, signal_handler);
		signal(SIGSEGV, signal_handler);
		signal(SIGABRT, signal_handler);
		/* wait */
		while (1) {
			int status;

			pid_t done = wait(&status);
			if (done == -1) {
				if (errno == ECHILD)
					break; /* No more child processes */
			} else {
				if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
					printf("Pid:%d failed\n", done);
					goto out;
				}
			}
		}
	}

out:
	if (ret == 0) {
		gettimeofday(&end, NULL);
		printf("time to collapse file thp: %ld ms\n",
				1000 * (end.tv_sec - start.tv_sec) +
				(end.tv_usec - start.tv_usec) / 1000);
	}

	return ret;
}

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-24  7:12         ` Rongwei Wang
@ 2021-09-27 22:24           ` Song Liu
  2021-09-28 12:06             ` Matthew Wilcox
  2021-09-28 16:20             ` Rongwei Wang
  0 siblings, 2 replies; 61+ messages in thread
From: Song Liu @ 2021-09-27 22:24 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: Andrew Morton, Matthew Wilcox, Linux MM,
	Linux Kernel Mailing List, William Kucharski, Hugh Dickins

On Fri, Sep 24, 2021 at 12:12 AM Rongwei Wang
<rongwei.wang@linux.alibaba.com> wrote:
>
>
>
> On 9/24/21 10:43 AM, Andrew Morton wrote:
> > On Thu, 23 Sep 2021 01:04:54 +0800 Rongwei Wang <rongwei.wang@linux.alibaba.com> wrote:
> >
> >>
> >>
> >>> On Sep 22, 2021, at 7:37 PM, Matthew Wilcox <willy@infradead.org> wrote:
> >>>
> >>> On Wed, Sep 22, 2021 at 03:06:44PM +0800, Rongwei Wang wrote:
> >>>> Transparent huge page has supported read-only non-shmem files. The file-
> >>>> backed THP is collapsed by khugepaged and truncated when written (for
> >>>> shared libraries).
> >>>>
> >>>> However, there is race in two possible places.
> >>>>
> >>>> 1) multiple writers truncate the same page cache concurrently;
> >>>> 2) collapse_file rolls back when writer truncates the page cache;
> >>>
> >>> As I've said before, the bug here is that somehow there is a writable fd
> >>> to a file with THPs.  That's what we need to track down and fix.
> >> Hi, Matthew
> >> I am not sure get your means. We know “mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs"
> >> Introduced file-backed THPs for DSO. It is possible {very rarely} for DSO to be opened in writeable way.
> >>
> >> ...
> >>
> >>> https://lore.kernel.org/linux-mm/YUdL3lFLFHzC80Wt@casper.infradead.org/
> >> All in all, what you mean is that we should solve this race at the source?
> >
> > Matthew is being pretty clear here: we shouldn't be permitting
> > userspace to get a writeable fd for a thp-backed file.
> >
> > Why are we permitting the DSO to be opened writeably?  If there's a
> > legitimate case for doing this then presumably "mm, thp: relax the
> There is a use case to stress file-backed THP within attachment.
> I test this case in a system which has enabled CONFIG_READ_ONLY_THP_FOR_FS:
>
> $ gcc -Wall -g -o stress_madvise_dso stress_madvise_dso.c
> $ ulimit -s unlimited
> $ ./stress_madvise_dso 10000 <libtest.so>
>
> the meaning of above parameters:
> 10000: the max test time;
> <libtest.so>: the DSO that will been mapped into file-backed THP by
> madvise. It recommended that the text segment of DSO to be tested is
> greater than 2M.
>
> The crash will been triggered at once in the latest kernel. And this
> case also can used to trigger the bug that mentioned in our another patch.

Hmm.. I am not able to use the repro program to crash the system. Not
sure what I did wrong.

OTOH, does it make sense to block writes within khugepaged, like:

diff --git i/mm/khugepaged.c w/mm/khugepaged.c
index 045cc579f724e..ad7c41ec15027 100644
--- i/mm/khugepaged.c
+++ w/mm/khugepaged.c
@@ -51,6 +51,7 @@ enum scan_result {
        SCAN_CGROUP_CHARGE_FAIL,
        SCAN_TRUNCATED,
        SCAN_PAGE_HAS_PRIVATE,
+       SCAN_BUSY_WRITE,
 };

 #define CREATE_TRACE_POINTS
@@ -1652,6 +1653,11 @@ static void collapse_file(struct mm_struct *mm,
        /* Only allocate from the target node */
        gfp = alloc_hugepage_khugepaged_gfpmask() | __GFP_THISNODE;

+       if (deny_write_access(file)) {
+               result = SCAN_BUSY_WRITE;
+               return;
+       }
+
        new_page = khugepaged_alloc_page(hpage, gfp, node);
        if (!new_page) {
                result = SCAN_ALLOC_HUGE_PAGE_FAIL;
@@ -1863,19 +1869,6 @@ static void collapse_file(struct mm_struct *mm,
        else {
                __mod_lruvec_page_state(new_page, NR_FILE_THPS, nr);
                filemap_nr_thps_inc(mapping);
-               /*
-                * Paired with smp_mb() in do_dentry_open() to ensure
-                * i_writecount is up to date and the update to nr_thps is
-                * visible. Ensures the page cache will be truncated if the
-                * file is opened writable.
-                */
-               smp_mb();
-               if (inode_is_open_for_write(mapping->host)) {
-                       result = SCAN_FAIL;
-                       __mod_lruvec_page_state(new_page, NR_FILE_THPS, -nr);
-                       filemap_nr_thps_dec(mapping);
-                       goto xa_locked;
-               }
        }

        if (nr_none) {
@@ -1976,6 +1969,7 @@ static void collapse_file(struct mm_struct *mm,
        VM_BUG_ON(!list_empty(&pagelist));
        if (!IS_ERR_OR_NULL(*hpage))
                mem_cgroup_uncharge(*hpage);
+       allow_write_access(file);
        /* TODO: tracepoints */
 }

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-27 22:24           ` Song Liu
@ 2021-09-28 12:06             ` Matthew Wilcox
  2021-09-28 16:59               ` Song Liu
  2021-09-28 16:20             ` Rongwei Wang
  1 sibling, 1 reply; 61+ messages in thread
From: Matthew Wilcox @ 2021-09-28 12:06 UTC (permalink / raw)
  To: Song Liu
  Cc: Rongwei Wang, Andrew Morton, Linux MM, Linux Kernel Mailing List,
	William Kucharski, Hugh Dickins

On Mon, Sep 27, 2021 at 03:24:47PM -0700, Song Liu wrote:
> OTOH, does it make sense to block writes within khugepaged, like:
> @@ -1652,6 +1653,11 @@ static void collapse_file(struct mm_struct *mm,
>         /* Only allocate from the target node */
>         gfp = alloc_hugepage_khugepaged_gfpmask() | __GFP_THISNODE;
> 
> +       if (deny_write_access(file)) {
> +               result = SCAN_BUSY_WRITE;
> +               return;
> +       }

The problem is that it denies, rather than blocking.  That means that the
writer gets ETXTBSY instead of waiting until khugepaged is done.


^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-27 22:24           ` Song Liu
  2021-09-28 12:06             ` Matthew Wilcox
@ 2021-09-28 16:20             ` Rongwei Wang
  2021-09-29  7:14               ` Song Liu
  1 sibling, 1 reply; 61+ messages in thread
From: Rongwei Wang @ 2021-09-28 16:20 UTC (permalink / raw)
  To: Song Liu
  Cc: Andrew Morton, Matthew Wilcox, Linux MM,
	Linux Kernel Mailing List, William Kucharski, Hugh Dickins

[-- Attachment #1: Type: text/plain, Size: 5274 bytes --]



On 9/28/21 6:24 AM, Song Liu wrote:
> On Fri, Sep 24, 2021 at 12:12 AM Rongwei Wang
> <rongwei.wang@linux.alibaba.com> wrote:
>>
>>
>>
>> On 9/24/21 10:43 AM, Andrew Morton wrote:
>>> On Thu, 23 Sep 2021 01:04:54 +0800 Rongwei Wang <rongwei.wang@linux.alibaba.com> wrote:
>>>
>>>>
>>>>
>>>>> On Sep 22, 2021, at 7:37 PM, Matthew Wilcox <willy@infradead.org> wrote:
>>>>>
>>>>> On Wed, Sep 22, 2021 at 03:06:44PM +0800, Rongwei Wang wrote:
>>>>>> Transparent huge page has supported read-only non-shmem files. The file-
>>>>>> backed THP is collapsed by khugepaged and truncated when written (for
>>>>>> shared libraries).
>>>>>>
>>>>>> However, there is race in two possible places.
>>>>>>
>>>>>> 1) multiple writers truncate the same page cache concurrently;
>>>>>> 2) collapse_file rolls back when writer truncates the page cache;
>>>>>
>>>>> As I've said before, the bug here is that somehow there is a writable fd
>>>>> to a file with THPs.  That's what we need to track down and fix.
>>>> Hi, Matthew
>>>> I am not sure get your means. We know “mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs"
>>>> Introduced file-backed THPs for DSO. It is possible {very rarely} for DSO to be opened in writeable way.
>>>>
>>>> ...
>>>>
>>>>> https://lore.kernel.org/linux-mm/YUdL3lFLFHzC80Wt@casper.infradead.org/
>>>> All in all, what you mean is that we should solve this race at the source?
>>>
>>> Matthew is being pretty clear here: we shouldn't be permitting
>>> userspace to get a writeable fd for a thp-backed file.
>>>
>>> Why are we permitting the DSO to be opened writeably?  If there's a
>>> legitimate case for doing this then presumably "mm, thp: relax the
>> There is a use case to stress file-backed THP within attachment.
>> I test this case in a system which has enabled CONFIG_READ_ONLY_THP_FOR_FS:
>>
>> $ gcc -Wall -g -o stress_madvise_dso stress_madvise_dso.c
>> $ ulimit -s unlimited
>> $ ./stress_madvise_dso 10000 <libtest.so>
>>
>> the meaning of above parameters:
>> 10000: the max test time;
>> <libtest.so>: the DSO that will been mapped into file-backed THP by
>> madvise. It recommended that the text segment of DSO to be tested is
>> greater than 2M.
>>
>> The crash will been triggered at once in the latest kernel. And this
>> case also can used to trigger the bug that mentioned in our another patch.
> 
> Hmm.. I am not able to use the repro program to crash the system. Not
> sure what I did wrong.
> 
Hi
I have tried to check my test case again. Can you make sure the DSO that 
you test have THP mapping?

If you are willing to try again, I can send my libtest.c which is used 
to test by myself (actually, it shouldn't be target DSO problem).

Thanks very much!
> OTOH, does it make sense to block writes within khugepaged, like:
> 
> diff --git i/mm/khugepaged.c w/mm/khugepaged.c
> index 045cc579f724e..ad7c41ec15027 100644
> --- i/mm/khugepaged.c
> +++ w/mm/khugepaged.c
> @@ -51,6 +51,7 @@ enum scan_result {
>          SCAN_CGROUP_CHARGE_FAIL,
>          SCAN_TRUNCATED,
>          SCAN_PAGE_HAS_PRIVATE,
> +       SCAN_BUSY_WRITE,
>   };
> 
>   #define CREATE_TRACE_POINTS
> @@ -1652,6 +1653,11 @@ static void collapse_file(struct mm_struct *mm,
>          /* Only allocate from the target node */
>          gfp = alloc_hugepage_khugepaged_gfpmask() | __GFP_THISNODE;
> 
> +       if (deny_write_access(file)) {
> +               result = SCAN_BUSY_WRITE;
> +               return;
> +       }
> +
This can indeed avoid some possible races from source.

But, I am thinking about whether this will lead to DDoS attack?
I remember the reason of DSO has ignored MAP_DENYWRITE in kernel
is that DDoS attack. In addition, 'deny_write_access' will change
the behavior, such as user will get 'Text file busy' during 
collapse_file. I am not sure whether the behavior changing is acceptable 
in user space.

If it is acceptable, I am very willing to fix the races like your way.

Thanks!
>          new_page = khugepaged_alloc_page(hpage, gfp, node);
>          if (!new_page) {
>                  result = SCAN_ALLOC_HUGE_PAGE_FAIL;
> @@ -1863,19 +1869,6 @@ static void collapse_file(struct mm_struct *mm,
>          else {
>                  __mod_lruvec_page_state(new_page, NR_FILE_THPS, nr);
>                  filemap_nr_thps_inc(mapping);
> -               /*
> -                * Paired with smp_mb() in do_dentry_open() to ensure
> -                * i_writecount is up to date and the update to nr_thps is
> -                * visible. Ensures the page cache will be truncated if the
> -                * file is opened writable.
> -                */
> -               smp_mb();
> -               if (inode_is_open_for_write(mapping->host)) {
> -                       result = SCAN_FAIL;
> -                       __mod_lruvec_page_state(new_page, NR_FILE_THPS, -nr);
> -                       filemap_nr_thps_dec(mapping);
> -                       goto xa_locked;
> -               }
>          }
> 
>          if (nr_none) {
> @@ -1976,6 +1969,7 @@ static void collapse_file(struct mm_struct *mm,
>          VM_BUG_ON(!list_empty(&pagelist));
>          if (!IS_ERR_OR_NULL(*hpage))
>                  mem_cgroup_uncharge(*hpage);
> +       allow_write_access(file);
>          /* TODO: tracepoints */
>   }
> 

[-- Attachment #2: libtest.c --]
[-- Type: text/plain, Size: 976 bytes --]

#ifndef _DEFAULT_SOURCE
#define _DEFAULT_SOURCE
#endif

#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>

/* "volatile" to forbid compiler optimization */
volatile static int x;

#define DO_0 ++x;
#define DO_1 {DO_0; DO_0; DO_0; DO_0; DO_0; DO_0; DO_0; DO_0; DO_0}
#define DO_2 {DO_1; DO_1; DO_1; DO_1; DO_1; DO_1; DO_1; DO_1; DO_1}
#define DO_3 {DO_2; DO_2; DO_2; DO_2; DO_2; DO_2; DO_2; DO_2; DO_2}
#define DO_4 {DO_3; DO_3; DO_3; DO_3; DO_3; DO_3; DO_3; DO_3; DO_3}
#define DO_5 {DO_4; DO_4; DO_4; DO_4; DO_4; DO_4; DO_4; DO_4; DO_4}
#define DO_6 {DO_5; DO_5; DO_5; DO_5; DO_5; DO_5; DO_5; DO_5; DO_5}
#define DO_7 {DO_6; DO_6; DO_6; DO_6; DO_6; DO_6; DO_6; DO_6; DO_6}

void libtest_work1(void)
{
	printf("work 1\n");
	DO_0;
}

void libtest_work2(void)
{
	printf("work 2\n");
	DO_2;
}

void libtest_work3(void)
{
	printf("work 3\n");
	DO_4;
}

void libtest_work4(void)
{
	printf("work 4\n");
	DO_6;
}

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-28 12:06             ` Matthew Wilcox
@ 2021-09-28 16:59               ` Song Liu
  0 siblings, 0 replies; 61+ messages in thread
From: Song Liu @ 2021-09-28 16:59 UTC (permalink / raw)
  To: Matthew Wilcox
  Cc: Rongwei Wang, Andrew Morton, Linux MM, Linux Kernel Mailing List,
	William Kucharski, Hugh Dickins

On Tue, Sep 28, 2021 at 5:07 AM Matthew Wilcox <willy@infradead.org> wrote:
>
> On Mon, Sep 27, 2021 at 03:24:47PM -0700, Song Liu wrote:
> > OTOH, does it make sense to block writes within khugepaged, like:
> > @@ -1652,6 +1653,11 @@ static void collapse_file(struct mm_struct *mm,
> >         /* Only allocate from the target node */
> >         gfp = alloc_hugepage_khugepaged_gfpmask() | __GFP_THISNODE;
> >
> > +       if (deny_write_access(file)) {
> > +               result = SCAN_BUSY_WRITE;
> > +               return;
> > +       }
>
> The problem is that it denies, rather than blocking.  That means that the
> writer gets ETXTBSY instead of waiting until khugepaged is done.
>

Yes, I was thinking about the same problem last night and this morning.
Unfortunately, I haven't got a good solution yet. Do you have some
suggestions on this?

Thanks,
Song

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-28 16:20             ` Rongwei Wang
@ 2021-09-29  7:14               ` Song Liu
  2021-09-29  7:50                 ` Rongwei Wang
  0 siblings, 1 reply; 61+ messages in thread
From: Song Liu @ 2021-09-29  7:14 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: Andrew Morton, Matthew Wilcox, Linux MM,
	Linux Kernel Mailing List, William Kucharski, Hugh Dickins

On Tue, Sep 28, 2021 at 9:20 AM Rongwei Wang
<rongwei.wang@linux.alibaba.com> wrote:
>
>
>
> On 9/28/21 6:24 AM, Song Liu wrote:
> > On Fri, Sep 24, 2021 at 12:12 AM Rongwei Wang
> > <rongwei.wang@linux.alibaba.com> wrote:
> >>
> >>
> >>
> >> On 9/24/21 10:43 AM, Andrew Morton wrote:
> >>> On Thu, 23 Sep 2021 01:04:54 +0800 Rongwei Wang <rongwei.wang@linux.alibaba.com> wrote:
> >>>
> >>>>
> >>>>
> >>>>> On Sep 22, 2021, at 7:37 PM, Matthew Wilcox <willy@infradead.org> wrote:
> >>>>>
> >>>>> On Wed, Sep 22, 2021 at 03:06:44PM +0800, Rongwei Wang wrote:
> >>>>>> Transparent huge page has supported read-only non-shmem files. The file-
> >>>>>> backed THP is collapsed by khugepaged and truncated when written (for
> >>>>>> shared libraries).
> >>>>>>
> >>>>>> However, there is race in two possible places.
> >>>>>>
> >>>>>> 1) multiple writers truncate the same page cache concurrently;
> >>>>>> 2) collapse_file rolls back when writer truncates the page cache;
> >>>>>
> >>>>> As I've said before, the bug here is that somehow there is a writable fd
> >>>>> to a file with THPs.  That's what we need to track down and fix.
> >>>> Hi, Matthew
> >>>> I am not sure get your means. We know “mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs"
> >>>> Introduced file-backed THPs for DSO. It is possible {very rarely} for DSO to be opened in writeable way.
> >>>>
> >>>> ...
> >>>>
> >>>>> https://lore.kernel.org/linux-mm/YUdL3lFLFHzC80Wt@casper.infradead.org/
> >>>> All in all, what you mean is that we should solve this race at the source?
> >>>
> >>> Matthew is being pretty clear here: we shouldn't be permitting
> >>> userspace to get a writeable fd for a thp-backed file.
> >>>
> >>> Why are we permitting the DSO to be opened writeably?  If there's a
> >>> legitimate case for doing this then presumably "mm, thp: relax the
> >> There is a use case to stress file-backed THP within attachment.
> >> I test this case in a system which has enabled CONFIG_READ_ONLY_THP_FOR_FS:
> >>
> >> $ gcc -Wall -g -o stress_madvise_dso stress_madvise_dso.c
> >> $ ulimit -s unlimited
> >> $ ./stress_madvise_dso 10000 <libtest.so>
> >>
> >> the meaning of above parameters:
> >> 10000: the max test time;
> >> <libtest.so>: the DSO that will been mapped into file-backed THP by
> >> madvise. It recommended that the text segment of DSO to be tested is
> >> greater than 2M.
> >>
> >> The crash will been triggered at once in the latest kernel. And this
> >> case also can used to trigger the bug that mentioned in our another patch.
> >
> > Hmm.. I am not able to use the repro program to crash the system. Not
> > sure what I did wrong.
> >
> Hi
> I have tried to check my test case again. Can you make sure the DSO that
> you test have THP mapping?
>
> If you are willing to try again, I can send my libtest.c which is used
> to test by myself (actually, it shouldn't be target DSO problem).
>
> Thanks very much!
> > OTOH, does it make sense to block writes within khugepaged, like:
> >
> > diff --git i/mm/khugepaged.c w/mm/khugepaged.c
> > index 045cc579f724e..ad7c41ec15027 100644
> > --- i/mm/khugepaged.c
> > +++ w/mm/khugepaged.c
> > @@ -51,6 +51,7 @@ enum scan_result {
> >          SCAN_CGROUP_CHARGE_FAIL,
> >          SCAN_TRUNCATED,
> >          SCAN_PAGE_HAS_PRIVATE,
> > +       SCAN_BUSY_WRITE,
> >   };
> >
> >   #define CREATE_TRACE_POINTS
> > @@ -1652,6 +1653,11 @@ static void collapse_file(struct mm_struct *mm,
> >          /* Only allocate from the target node */
> >          gfp = alloc_hugepage_khugepaged_gfpmask() | __GFP_THISNODE;
> >
> > +       if (deny_write_access(file)) {
> > +               result = SCAN_BUSY_WRITE;
> > +               return;
> > +       }
> > +
> This can indeed avoid some possible races from source.
>
> But, I am thinking about whether this will lead to DDoS attack?
> I remember the reason of DSO has ignored MAP_DENYWRITE in kernel
> is that DDoS attack. In addition, 'deny_write_access' will change
> the behavior, such as user will get 'Text file busy' during
> collapse_file. I am not sure whether the behavior changing is acceptable
> in user space.
>
> If it is acceptable, I am very willing to fix the races like your way.

I guess we should not let the write get ETXTBUSY for khugepaged work.

I am getting some segfault on stress_madvise_dso. And it doesn't really
generate the bug stack in my vm (qemu-system-x86_64). Is there an newer
version of it?

Thanks,
Song

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-29  7:14               ` Song Liu
@ 2021-09-29  7:50                 ` Rongwei Wang
  2021-09-29 16:59                   ` Song Liu
  0 siblings, 1 reply; 61+ messages in thread
From: Rongwei Wang @ 2021-09-29  7:50 UTC (permalink / raw)
  To: Song Liu
  Cc: Andrew Morton, Matthew Wilcox, Linux MM,
	Linux Kernel Mailing List, William Kucharski, Hugh Dickins



On 9/29/21 3:14 PM, Song Liu wrote:
> On Tue, Sep 28, 2021 at 9:20 AM Rongwei Wang
> <rongwei.wang@linux.alibaba.com> wrote:
>>
>>
>>
>> On 9/28/21 6:24 AM, Song Liu wrote:
>>> On Fri, Sep 24, 2021 at 12:12 AM Rongwei Wang
>>> <rongwei.wang@linux.alibaba.com> wrote:
>>>>
>>>>
>>>>
>>>> On 9/24/21 10:43 AM, Andrew Morton wrote:
>>>>> On Thu, 23 Sep 2021 01:04:54 +0800 Rongwei Wang <rongwei.wang@linux.alibaba.com> wrote:
>>>>>
>>>>>>
>>>>>>
>>>>>>> On Sep 22, 2021, at 7:37 PM, Matthew Wilcox <willy@infradead.org> wrote:
>>>>>>>
>>>>>>> On Wed, Sep 22, 2021 at 03:06:44PM +0800, Rongwei Wang wrote:
>>>>>>>> Transparent huge page has supported read-only non-shmem files. The file-
>>>>>>>> backed THP is collapsed by khugepaged and truncated when written (for
>>>>>>>> shared libraries).
>>>>>>>>
>>>>>>>> However, there is race in two possible places.
>>>>>>>>
>>>>>>>> 1) multiple writers truncate the same page cache concurrently;
>>>>>>>> 2) collapse_file rolls back when writer truncates the page cache;
>>>>>>>
>>>>>>> As I've said before, the bug here is that somehow there is a writable fd
>>>>>>> to a file with THPs.  That's what we need to track down and fix.
>>>>>> Hi, Matthew
>>>>>> I am not sure get your means. We know “mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs"
>>>>>> Introduced file-backed THPs for DSO. It is possible {very rarely} for DSO to be opened in writeable way.
>>>>>>
>>>>>> ...
>>>>>>
>>>>>>> https://lore.kernel.org/linux-mm/YUdL3lFLFHzC80Wt@casper.infradead.org/
>>>>>> All in all, what you mean is that we should solve this race at the source?
>>>>>
>>>>> Matthew is being pretty clear here: we shouldn't be permitting
>>>>> userspace to get a writeable fd for a thp-backed file.
>>>>>
>>>>> Why are we permitting the DSO to be opened writeably?  If there's a
>>>>> legitimate case for doing this then presumably "mm, thp: relax the
>>>> There is a use case to stress file-backed THP within attachment.
>>>> I test this case in a system which has enabled CONFIG_READ_ONLY_THP_FOR_FS:
>>>>
>>>> $ gcc -Wall -g -o stress_madvise_dso stress_madvise_dso.c
>>>> $ ulimit -s unlimited
>>>> $ ./stress_madvise_dso 10000 <libtest.so>
>>>>
>>>> the meaning of above parameters:
>>>> 10000: the max test time;
>>>> <libtest.so>: the DSO that will been mapped into file-backed THP by
>>>> madvise. It recommended that the text segment of DSO to be tested is
>>>> greater than 2M.
>>>>
>>>> The crash will been triggered at once in the latest kernel. And this
>>>> case also can used to trigger the bug that mentioned in our another patch.
>>>
>>> Hmm.. I am not able to use the repro program to crash the system. Not
>>> sure what I did wrong.
>>>
>> Hi
>> I have tried to check my test case again. Can you make sure the DSO that
>> you test have THP mapping?
>>
>> If you are willing to try again, I can send my libtest.c which is used
>> to test by myself (actually, it shouldn't be target DSO problem).
>>
>> Thanks very much!
>>> OTOH, does it make sense to block writes within khugepaged, like:
>>>
>>> diff --git i/mm/khugepaged.c w/mm/khugepaged.c
>>> index 045cc579f724e..ad7c41ec15027 100644
>>> --- i/mm/khugepaged.c
>>> +++ w/mm/khugepaged.c
>>> @@ -51,6 +51,7 @@ enum scan_result {
>>>           SCAN_CGROUP_CHARGE_FAIL,
>>>           SCAN_TRUNCATED,
>>>           SCAN_PAGE_HAS_PRIVATE,
>>> +       SCAN_BUSY_WRITE,
>>>    };
>>>
>>>    #define CREATE_TRACE_POINTS
>>> @@ -1652,6 +1653,11 @@ static void collapse_file(struct mm_struct *mm,
>>>           /* Only allocate from the target node */
>>>           gfp = alloc_hugepage_khugepaged_gfpmask() | __GFP_THISNODE;
>>>
>>> +       if (deny_write_access(file)) {
>>> +               result = SCAN_BUSY_WRITE;
>>> +               return;
>>> +       }
>>> +
>> This can indeed avoid some possible races from source.
>>
>> But, I am thinking about whether this will lead to DDoS attack?
>> I remember the reason of DSO has ignored MAP_DENYWRITE in kernel
>> is that DDoS attack. In addition, 'deny_write_access' will change
>> the behavior, such as user will get 'Text file busy' during
>> collapse_file. I am not sure whether the behavior changing is acceptable
>> in user space.
>>
>> If it is acceptable, I am very willing to fix the races like your way.
> 
> I guess we should not let the write get ETXTBUSY for khugepaged work.
> 
> I am getting some segfault on stress_madvise_dso. And it doesn't really
> generate the bug stack in my vm (qemu-system-x86_64). Is there an newer
Hi, I can sure I am not update the stress_madvise_dso.c.

My test environment is vm (qemu-system-aarch64, 32 cores). And I can 
think of the following possibilities:

(1) in thread_read()

printf("read %s\n", dso_path);
d = open(dso_path, O_RDONLY);
/* The start addr must be alignment with 2M */
void *p = mmap((void *)0x40000dc00000UL, 0x800000, PROT_READ | 
PROT_EXEC,MAP_PRIVATE, fd, 0);
if (p == MAP_FAILED) {
	perror("mmap");
	goto out;
}

0x40000dc00000 is random setting by myself. I am not sure this address 
is available in your vm.

(2) in thread_write()
int fd = open(dso_path, O_RDWR);
p = mmap(NULL, 0x800000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (p == MAP_FAILED) {
	perror("mmap");
         goto out; /* fail */
}

because of I am sure the DSO is bigger than 0x800000, so directly map 
the DSO using 0x800000. Maybe I had use '-z max-page-size=0x200000' to 
compile the DSO? likes:
$ gcc -z max-page-size=0x200000 -o libtest.so -shared libtest.o

If you don't mind, you can send the segment fault log to me. And I will
find x86 environment to test.

Thanks!
> version of it?
> 
> Thanks,
> Song
> 

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-29  7:50                 ` Rongwei Wang
@ 2021-09-29 16:59                   ` Song Liu
  2021-09-29 17:55                     ` Matthew Wilcox
  0 siblings, 1 reply; 61+ messages in thread
From: Song Liu @ 2021-09-29 16:59 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: Andrew Morton, Matthew Wilcox, Linux MM,
	Linux Kernel Mailing List, William Kucharski, Hugh Dickins

On Wed, Sep 29, 2021 at 12:50 AM Rongwei Wang
<rongwei.wang@linux.alibaba.com> wrote:
>
>
>
> On 9/29/21 3:14 PM, Song Liu wrote:
> > On Tue, Sep 28, 2021 at 9:20 AM Rongwei Wang
> > <rongwei.wang@linux.alibaba.com> wrote:
> >>
> >>
> >>
> >> On 9/28/21 6:24 AM, Song Liu wrote:
> >>> On Fri, Sep 24, 2021 at 12:12 AM Rongwei Wang
> >>> <rongwei.wang@linux.alibaba.com> wrote:
> >>>>
> >>>>
> >>>>
> >>>> On 9/24/21 10:43 AM, Andrew Morton wrote:
> >>>>> On Thu, 23 Sep 2021 01:04:54 +0800 Rongwei Wang <rongwei.wang@linux.alibaba.com> wrote:
> >>>>>
> >>>>>>
> >>>>>>
> >>>>>>> On Sep 22, 2021, at 7:37 PM, Matthew Wilcox <willy@infradead.org> wrote:
> >>>>>>>
> >>>>>>> On Wed, Sep 22, 2021 at 03:06:44PM +0800, Rongwei Wang wrote:
> >>>>>>>> Transparent huge page has supported read-only non-shmem files. The file-
> >>>>>>>> backed THP is collapsed by khugepaged and truncated when written (for
> >>>>>>>> shared libraries).
> >>>>>>>>
> >>>>>>>> However, there is race in two possible places.
> >>>>>>>>
> >>>>>>>> 1) multiple writers truncate the same page cache concurrently;
> >>>>>>>> 2) collapse_file rolls back when writer truncates the page cache;
> >>>>>>>
> >>>>>>> As I've said before, the bug here is that somehow there is a writable fd
> >>>>>>> to a file with THPs.  That's what we need to track down and fix.
> >>>>>> Hi, Matthew
> >>>>>> I am not sure get your means. We know “mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs"
> >>>>>> Introduced file-backed THPs for DSO. It is possible {very rarely} for DSO to be opened in writeable way.
> >>>>>>
> >>>>>> ...
> >>>>>>
> >>>>>>> https://lore.kernel.org/linux-mm/YUdL3lFLFHzC80Wt@casper.infradead.org/
> >>>>>> All in all, what you mean is that we should solve this race at the source?
> >>>>>
> >>>>> Matthew is being pretty clear here: we shouldn't be permitting
> >>>>> userspace to get a writeable fd for a thp-backed file.
> >>>>>
> >>>>> Why are we permitting the DSO to be opened writeably?  If there's a
> >>>>> legitimate case for doing this then presumably "mm, thp: relax the
> >>>> There is a use case to stress file-backed THP within attachment.
> >>>> I test this case in a system which has enabled CONFIG_READ_ONLY_THP_FOR_FS:
> >>>>
> >>>> $ gcc -Wall -g -o stress_madvise_dso stress_madvise_dso.c
> >>>> $ ulimit -s unlimited
> >>>> $ ./stress_madvise_dso 10000 <libtest.so>
> >>>>
> >>>> the meaning of above parameters:
> >>>> 10000: the max test time;
> >>>> <libtest.so>: the DSO that will been mapped into file-backed THP by
> >>>> madvise. It recommended that the text segment of DSO to be tested is
> >>>> greater than 2M.
> >>>>
> >>>> The crash will been triggered at once in the latest kernel. And this
> >>>> case also can used to trigger the bug that mentioned in our another patch.
> >>>
> >>> Hmm.. I am not able to use the repro program to crash the system. Not
> >>> sure what I did wrong.
> >>>
> >> Hi
> >> I have tried to check my test case again. Can you make sure the DSO that
> >> you test have THP mapping?
> >>
> >> If you are willing to try again, I can send my libtest.c which is used
> >> to test by myself (actually, it shouldn't be target DSO problem).
> >>
> >> Thanks very much!
> >>> OTOH, does it make sense to block writes within khugepaged, like:
> >>>
> >>> diff --git i/mm/khugepaged.c w/mm/khugepaged.c
> >>> index 045cc579f724e..ad7c41ec15027 100644
> >>> --- i/mm/khugepaged.c
> >>> +++ w/mm/khugepaged.c
> >>> @@ -51,6 +51,7 @@ enum scan_result {
> >>>           SCAN_CGROUP_CHARGE_FAIL,
> >>>           SCAN_TRUNCATED,
> >>>           SCAN_PAGE_HAS_PRIVATE,
> >>> +       SCAN_BUSY_WRITE,
> >>>    };
> >>>
> >>>    #define CREATE_TRACE_POINTS
> >>> @@ -1652,6 +1653,11 @@ static void collapse_file(struct mm_struct *mm,
> >>>           /* Only allocate from the target node */
> >>>           gfp = alloc_hugepage_khugepaged_gfpmask() | __GFP_THISNODE;
> >>>
> >>> +       if (deny_write_access(file)) {
> >>> +               result = SCAN_BUSY_WRITE;
> >>> +               return;
> >>> +       }
> >>> +
> >> This can indeed avoid some possible races from source.
> >>
> >> But, I am thinking about whether this will lead to DDoS attack?
> >> I remember the reason of DSO has ignored MAP_DENYWRITE in kernel
> >> is that DDoS attack. In addition, 'deny_write_access' will change
> >> the behavior, such as user will get 'Text file busy' during
> >> collapse_file. I am not sure whether the behavior changing is acceptable
> >> in user space.
> >>
> >> If it is acceptable, I am very willing to fix the races like your way.
> >
> > I guess we should not let the write get ETXTBUSY for khugepaged work.
> >
> > I am getting some segfault on stress_madvise_dso. And it doesn't really
> > generate the bug stack in my vm (qemu-system-x86_64). Is there an newer
> Hi, I can sure I am not update the stress_madvise_dso.c.
>
> My test environment is vm (qemu-system-aarch64, 32 cores). And I can
> think of the following possibilities:
>
> (1) in thread_read()
>
> printf("read %s\n", dso_path);
> d = open(dso_path, O_RDONLY);
> /* The start addr must be alignment with 2M */
> void *p = mmap((void *)0x40000dc00000UL, 0x800000, PROT_READ |
> PROT_EXEC,MAP_PRIVATE, fd, 0);
> if (p == MAP_FAILED) {
>         perror("mmap");
>         goto out;
> }
>
> 0x40000dc00000 is random setting by myself. I am not sure this address
> is available in your vm.
>
> (2) in thread_write()
> int fd = open(dso_path, O_RDWR);
> p = mmap(NULL, 0x800000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
> if (p == MAP_FAILED) {
>         perror("mmap");
>          goto out; /* fail */
> }
>
> because of I am sure the DSO is bigger than 0x800000, so directly map
> the DSO using 0x800000. Maybe I had use '-z max-page-size=0x200000' to
> compile the DSO? likes:
> $ gcc -z max-page-size=0x200000 -o libtest.so -shared libtest.o
>
> If you don't mind, you can send the segment fault log to me. And I will
> find x86 environment to test.

I fixed the segfault with
1. malloc buf (as it is too big for stack) in thread_read
2. reduce memcpy() size in thread_read.

Now, I am able to crash the system on
    find_lock_entries () {
     ...
       VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
    }
I guess it is related. I will test more.

Thanks,
Song

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-29 16:59                   ` Song Liu
@ 2021-09-29 17:55                     ` Matthew Wilcox
  2021-09-29 23:41                       ` Song Liu
  0 siblings, 1 reply; 61+ messages in thread
From: Matthew Wilcox @ 2021-09-29 17:55 UTC (permalink / raw)
  To: Song Liu
  Cc: Rongwei Wang, Andrew Morton, Linux MM, Linux Kernel Mailing List,
	William Kucharski, Hugh Dickins

On Wed, Sep 29, 2021 at 09:59:38AM -0700, Song Liu wrote:
> On Wed, Sep 29, 2021 at 12:50 AM Rongwei Wang
> <rongwei.wang@linux.alibaba.com> wrote:
> >
> >
> >
> > On 9/29/21 3:14 PM, Song Liu wrote:
> > > On Tue, Sep 28, 2021 at 9:20 AM Rongwei Wang
> > > <rongwei.wang@linux.alibaba.com> wrote:
> > >>
> > >>
> > >>
> > >> On 9/28/21 6:24 AM, Song Liu wrote:
> > >>> On Fri, Sep 24, 2021 at 12:12 AM Rongwei Wang
> > >>> <rongwei.wang@linux.alibaba.com> wrote:
> > >>>>
> > >>>>
> > >>>>
> > >>>> On 9/24/21 10:43 AM, Andrew Morton wrote:
> > >>>>> On Thu, 23 Sep 2021 01:04:54 +0800 Rongwei Wang <rongwei.wang@linux.alibaba.com> wrote:
> > >>>>>
> > >>>>>>
> > >>>>>>
> > >>>>>>> On Sep 22, 2021, at 7:37 PM, Matthew Wilcox <willy@infradead.org> wrote:
> > >>>>>>>
> > >>>>>>> On Wed, Sep 22, 2021 at 03:06:44PM +0800, Rongwei Wang wrote:
> > >>>>>>>> Transparent huge page has supported read-only non-shmem files. The file-
> > >>>>>>>> backed THP is collapsed by khugepaged and truncated when written (for
> > >>>>>>>> shared libraries).
> > >>>>>>>>
> > >>>>>>>> However, there is race in two possible places.
> > >>>>>>>>
> > >>>>>>>> 1) multiple writers truncate the same page cache concurrently;
> > >>>>>>>> 2) collapse_file rolls back when writer truncates the page cache;
> > >>>>>>>
> > >>>>>>> As I've said before, the bug here is that somehow there is a writable fd
> > >>>>>>> to a file with THPs.  That's what we need to track down and fix.
> > >>>>>> Hi, Matthew
> > >>>>>> I am not sure get your means. We know “mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs"
> > >>>>>> Introduced file-backed THPs for DSO. It is possible {very rarely} for DSO to be opened in writeable way.
> > >>>>>>
> > >>>>>> ...
> > >>>>>>
> > >>>>>>> https://lore.kernel.org/linux-mm/YUdL3lFLFHzC80Wt@casper.infradead.org/
> > >>>>>> All in all, what you mean is that we should solve this race at the source?
> > >>>>>
> > >>>>> Matthew is being pretty clear here: we shouldn't be permitting
> > >>>>> userspace to get a writeable fd for a thp-backed file.
> > >>>>>
> > >>>>> Why are we permitting the DSO to be opened writeably?  If there's a
> > >>>>> legitimate case for doing this then presumably "mm, thp: relax the
> > >>>> There is a use case to stress file-backed THP within attachment.
> > >>>> I test this case in a system which has enabled CONFIG_READ_ONLY_THP_FOR_FS:
> > >>>>
> > >>>> $ gcc -Wall -g -o stress_madvise_dso stress_madvise_dso.c
> > >>>> $ ulimit -s unlimited
> > >>>> $ ./stress_madvise_dso 10000 <libtest.so>
> > >>>>
> > >>>> the meaning of above parameters:
> > >>>> 10000: the max test time;
> > >>>> <libtest.so>: the DSO that will been mapped into file-backed THP by
> > >>>> madvise. It recommended that the text segment of DSO to be tested is
> > >>>> greater than 2M.
> > >>>>
> > >>>> The crash will been triggered at once in the latest kernel. And this
> > >>>> case also can used to trigger the bug that mentioned in our another patch.
> > >>>
> > >>> Hmm.. I am not able to use the repro program to crash the system. Not
> > >>> sure what I did wrong.
> > >>>
> > >> Hi
> > >> I have tried to check my test case again. Can you make sure the DSO that
> > >> you test have THP mapping?
> > >>
> > >> If you are willing to try again, I can send my libtest.c which is used
> > >> to test by myself (actually, it shouldn't be target DSO problem).
> > >>
> > >> Thanks very much!
> > >>> OTOH, does it make sense to block writes within khugepaged, like:
> > >>>
> > >>> diff --git i/mm/khugepaged.c w/mm/khugepaged.c
> > >>> index 045cc579f724e..ad7c41ec15027 100644
> > >>> --- i/mm/khugepaged.c
> > >>> +++ w/mm/khugepaged.c
> > >>> @@ -51,6 +51,7 @@ enum scan_result {
> > >>>           SCAN_CGROUP_CHARGE_FAIL,
> > >>>           SCAN_TRUNCATED,
> > >>>           SCAN_PAGE_HAS_PRIVATE,
> > >>> +       SCAN_BUSY_WRITE,
> > >>>    };
> > >>>
> > >>>    #define CREATE_TRACE_POINTS
> > >>> @@ -1652,6 +1653,11 @@ static void collapse_file(struct mm_struct *mm,
> > >>>           /* Only allocate from the target node */
> > >>>           gfp = alloc_hugepage_khugepaged_gfpmask() | __GFP_THISNODE;
> > >>>
> > >>> +       if (deny_write_access(file)) {
> > >>> +               result = SCAN_BUSY_WRITE;
> > >>> +               return;
> > >>> +       }
> > >>> +
> > >> This can indeed avoid some possible races from source.
> > >>
> > >> But, I am thinking about whether this will lead to DDoS attack?
> > >> I remember the reason of DSO has ignored MAP_DENYWRITE in kernel
> > >> is that DDoS attack. In addition, 'deny_write_access' will change
> > >> the behavior, such as user will get 'Text file busy' during
> > >> collapse_file. I am not sure whether the behavior changing is acceptable
> > >> in user space.
> > >>
> > >> If it is acceptable, I am very willing to fix the races like your way.
> > >
> > > I guess we should not let the write get ETXTBUSY for khugepaged work.
> > >
> > > I am getting some segfault on stress_madvise_dso. And it doesn't really
> > > generate the bug stack in my vm (qemu-system-x86_64). Is there an newer
> > Hi, I can sure I am not update the stress_madvise_dso.c.
> >
> > My test environment is vm (qemu-system-aarch64, 32 cores). And I can
> > think of the following possibilities:
> >
> > (1) in thread_read()
> >
> > printf("read %s\n", dso_path);
> > d = open(dso_path, O_RDONLY);
> > /* The start addr must be alignment with 2M */
> > void *p = mmap((void *)0x40000dc00000UL, 0x800000, PROT_READ |
> > PROT_EXEC,MAP_PRIVATE, fd, 0);
> > if (p == MAP_FAILED) {
> >         perror("mmap");
> >         goto out;
> > }
> >
> > 0x40000dc00000 is random setting by myself. I am not sure this address
> > is available in your vm.
> >
> > (2) in thread_write()
> > int fd = open(dso_path, O_RDWR);
> > p = mmap(NULL, 0x800000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
> > if (p == MAP_FAILED) {
> >         perror("mmap");
> >          goto out; /* fail */
> > }
> >
> > because of I am sure the DSO is bigger than 0x800000, so directly map
> > the DSO using 0x800000. Maybe I had use '-z max-page-size=0x200000' to
> > compile the DSO? likes:
> > $ gcc -z max-page-size=0x200000 -o libtest.so -shared libtest.o
> >
> > If you don't mind, you can send the segment fault log to me. And I will
> > find x86 environment to test.
> 
> I fixed the segfault with
> 1. malloc buf (as it is too big for stack) in thread_read
> 2. reduce memcpy() size in thread_read.
> 
> Now, I am able to crash the system on
>     find_lock_entries () {
>      ...
>        VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
>     }
> I guess it is related. I will test more.

That's a bogus VM_BUG_ON.  I have a patch in my tree to delete it.
Andrew has it too, but for some reason, he hasn't sent it on to Linus.

+++ b/mm/filemap.c
@@ -2093,7 +2093,6 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
                if (!xa_is_value(page)) {
                        if (page->index < start)
                                goto put;
-                       VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
                        if (page->index + thp_nr_pages(page) - 1 > end)
                                goto put;
                        if (!trylock_page(page))



^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-29 17:55                     ` Matthew Wilcox
@ 2021-09-29 23:41                       ` Song Liu
  2021-09-30  0:00                         ` Matthew Wilcox
  2021-09-30  1:54                         ` Rongwei Wang
  0 siblings, 2 replies; 61+ messages in thread
From: Song Liu @ 2021-09-29 23:41 UTC (permalink / raw)
  To: Matthew Wilcox
  Cc: Rongwei Wang, Andrew Morton, Linux MM, Linux Kernel Mailing List,
	William Kucharski, Hugh Dickins

On Wed, Sep 29, 2021 at 10:56 AM Matthew Wilcox <willy@infradead.org> wrote:
>
[...]
> > Now, I am able to crash the system on
> >     find_lock_entries () {
> >      ...
> >        VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
> >     }
> > I guess it is related. I will test more.
>
> That's a bogus VM_BUG_ON.  I have a patch in my tree to delete it.
> Andrew has it too, but for some reason, he hasn't sent it on to Linus.
>
> +++ b/mm/filemap.c
> @@ -2093,7 +2093,6 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
>                 if (!xa_is_value(page)) {
>                         if (page->index < start)
>                                 goto put;
> -                       VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
>                         if (page->index + thp_nr_pages(page) - 1 > end)
>                                 goto put;
>                         if (!trylock_page(page))

Yes, after removing this line, I am able to see the same bug.

Here is my finding so far:

The issue is NOT caused by concurrent khugepaged:collapse_file() and
truncate_pagecache(inode, 0). With some printks, we can see a clear
time gap (>2 second )  between collapse_file() finishes, and
truncate_pagecache() (which crashes soon). Therefore, my earlier
suggestion that adds deny_write_access() to collapse_file() does NOT
work.

The crash is actually caused by concurrent truncate_pagecache(inode, 0).
If I change the number of write thread in stress_madvise_dso.c to one,
(IOW, one thread_read and one thread_write), I cannot reproduce the
crash anymore.

I think this means we cannot fix this issue in collapse_file(), because it
finishes long before the crash.

Thanks,
Song

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-29 23:41                       ` Song Liu
@ 2021-09-30  0:00                         ` Matthew Wilcox
  2021-09-30  0:41                           ` Song Liu
  2021-09-30  1:54                         ` Rongwei Wang
  1 sibling, 1 reply; 61+ messages in thread
From: Matthew Wilcox @ 2021-09-30  0:00 UTC (permalink / raw)
  To: Song Liu
  Cc: Rongwei Wang, Andrew Morton, Linux MM, Linux Kernel Mailing List,
	William Kucharski, Hugh Dickins

On Wed, Sep 29, 2021 at 04:41:48PM -0700, Song Liu wrote:
> The issue is NOT caused by concurrent khugepaged:collapse_file() and
> truncate_pagecache(inode, 0). With some printks, we can see a clear
> time gap (>2 second )  between collapse_file() finishes, and
> truncate_pagecache() (which crashes soon). Therefore, my earlier
> suggestion that adds deny_write_access() to collapse_file() does NOT
> work.
> 
> The crash is actually caused by concurrent truncate_pagecache(inode, 0).
> If I change the number of write thread in stress_madvise_dso.c to one,
> (IOW, one thread_read and one thread_write), I cannot reproduce the
> crash anymore.
> 
> I think this means we cannot fix this issue in collapse_file(), because it
> finishes long before the crash.

Ah!  So are we missing one or more of these locks:

	inode_lock(inode);
	filemap_invalidate_lock(mapping);

in the open path?

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-30  0:00                         ` Matthew Wilcox
@ 2021-09-30  0:41                           ` Song Liu
  2021-09-30  2:14                             ` Rongwei Wang
  2021-10-04 17:26                             ` Rongwei Wang
  0 siblings, 2 replies; 61+ messages in thread
From: Song Liu @ 2021-09-30  0:41 UTC (permalink / raw)
  To: Matthew Wilcox
  Cc: Rongwei Wang, Andrew Morton, Linux MM, Linux Kernel Mailing List,
	William Kucharski, Hugh Dickins

On Wed, Sep 29, 2021 at 5:02 PM Matthew Wilcox <willy@infradead.org> wrote:
>
> On Wed, Sep 29, 2021 at 04:41:48PM -0700, Song Liu wrote:
> > The issue is NOT caused by concurrent khugepaged:collapse_file() and
> > truncate_pagecache(inode, 0). With some printks, we can see a clear
> > time gap (>2 second )  between collapse_file() finishes, and
> > truncate_pagecache() (which crashes soon). Therefore, my earlier
> > suggestion that adds deny_write_access() to collapse_file() does NOT
> > work.
> >
> > The crash is actually caused by concurrent truncate_pagecache(inode, 0).
> > If I change the number of write thread in stress_madvise_dso.c to one,
> > (IOW, one thread_read and one thread_write), I cannot reproduce the
> > crash anymore.
> >
> > I think this means we cannot fix this issue in collapse_file(), because it
> > finishes long before the crash.
>
> Ah!  So are we missing one or more of these locks:
>
>         inode_lock(inode);
>         filemap_invalidate_lock(mapping);
>
> in the open path?

The following fixes the crash in my test. But I am not sure whether this is the
best fix.

Rongwei, could you please run more tests on it?

Thanks,
Song


diff --git i/fs/open.c w/fs/open.c
index daa324606a41f..d13c4668b2e53 100644
--- i/fs/open.c
+++ w/fs/open.c
@@ -856,8 +856,11 @@ static int do_dentry_open(struct file *f,
                 * of THPs into the page cache will fail.
                 */
                smp_mb();
-               if (filemap_nr_thps(inode->i_mapping))
+               if (filemap_nr_thps(inode->i_mapping)) {
+                       filemap_invalidate_lock(inode->i_mapping);
                        truncate_pagecache(inode, 0);
+                       filemap_invalidate_unlock(inode->i_mapping);
+               }
        }

        return 0;

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-29 23:41                       ` Song Liu
  2021-09-30  0:00                         ` Matthew Wilcox
@ 2021-09-30  1:54                         ` Rongwei Wang
  2021-09-30  3:26                           ` Song Liu
  1 sibling, 1 reply; 61+ messages in thread
From: Rongwei Wang @ 2021-09-30  1:54 UTC (permalink / raw)
  To: Song Liu, Matthew Wilcox
  Cc: Andrew Morton, Linux MM, Linux Kernel Mailing List,
	William Kucharski, Hugh Dickins



On 9/30/21 7:41 AM, Song Liu wrote:
> On Wed, Sep 29, 2021 at 10:56 AM Matthew Wilcox <willy@infradead.org> wrote:
>>
> [...]
>>> Now, I am able to crash the system on
>>>      find_lock_entries () {
>>>       ...
>>>         VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
>>>      }
>>> I guess it is related. I will test more.
>>
>> That's a bogus VM_BUG_ON.  I have a patch in my tree to delete it.
>> Andrew has it too, but for some reason, he hasn't sent it on to Linus.
>>
>> +++ b/mm/filemap.c
>> @@ -2093,7 +2093,6 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
>>                  if (!xa_is_value(page)) {
>>                          if (page->index < start)
>>                                  goto put;
>> -                       VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
>>                          if (page->index + thp_nr_pages(page) - 1 > end)
>>                                  goto put;
>>                          if (!trylock_page(page))
> 
> Yes, after removing this line, I am able to see the same bug.
> 
> Here is my finding so far:
> 
> The issue is NOT caused by concurrent khugepaged:collapse_file() and
> truncate_pagecache(inode, 0). With some printks, we can see a clear
> time gap (>2 second )  between collapse_file() finishes, and
> truncate_pagecache() (which crashes soon). Therefore, my earlier
> suggestion that adds deny_write_access() to collapse_file() does NOT
> work.
> 
> The crash is actually caused by concurrent truncate_pagecache(inode, 0).
> If I change the number of write thread in stress_madvise_dso.c to one,
> (IOW, one thread_read and one thread_write), I cannot reproduce the
> crash anymore.
Whether CONFIG_DEBUG_VM is enabled in your vm?

I think the second possibility mentioned above will been found if you 
enable CONFIG_DEBUG_VM:

1) multiple writers truncate the same page cache concurrently;
2) collapse_file rolls back when writer truncates the page cache;

The following log will be print after enable CONFIG_DEBUG_VM:

[22216.789904]  do_idle+0xb4/0x104
[22216.789906]  cpu_startup_entry+0x34/0x9c
[22216.790144] Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS 
0.0.0 02/06/2015
[22216.790553]  secondary_start_kernel+0x104/0x180
[22216.790778] Call trace:
[22216.791300] Code: d4210000 b0006161 910d4021 94013b45 (d4210000)
[22216.791662]  dump_backtrace+0x0/0x1ec
[22216.791664]  show_stack+0x24/0x30
[22216.791956] ---[ end trace dc769a61c1af087b ]---
[22216.792295]  dump_stack+0xd0/0x128
[22216.792299]  bad_page+0xe4/0x110
[22216.792579] Kernel panic - not syncing: Oops - BUG: Fatal exception 
in interrupt
[22216.792937]  check_free_page_bad+0x84/0x90
[22216.792940]  free_pcp_prepare+0x1fc/0x21c
[22216.793253] SMP: stopping secondary CPUs
[22216.793525]  free_unref_page+0x2c/0xec
[22216.805537]  __put_page+0x60/0x70
[22216.805931]  collapse_file+0xdc8/0x12f0
[22216.806385]  khugepaged_scan_file+0x2dc/0x37c
[22216.806900]  khugepaged_scan_mm_slot+0x2e0/0x380
[22216.807450]  khugepaged_do_scan+0x2dc/0x2fc
[22216.807946]  khugepaged+0x38/0x100
[22216.808342]  kthread+0x11c/0x120
[22216.808735] Kernel Offset: disabled
[22216.809153] CPU features: 0x0040002,62208238
[22216.809681] Memory Limit: none
[22216.813477] Starting crashdump kernel...

So I think the race also exists between collapse_file and 
truncate_pagecache.

> 
> I think this means we cannot fix this issue in collapse_file(), because it
> finishes long before the crash.
> 
> Thanks,
> Song
> 

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-30  0:41                           ` Song Liu
@ 2021-09-30  2:14                             ` Rongwei Wang
  2021-10-04 17:26                             ` Rongwei Wang
  1 sibling, 0 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-09-30  2:14 UTC (permalink / raw)
  To: Song Liu, Matthew Wilcox
  Cc: Andrew Morton, Linux MM, Linux Kernel Mailing List,
	William Kucharski, Hugh Dickins



On 9/30/21 8:41 AM, Song Liu wrote:
> On Wed, Sep 29, 2021 at 5:02 PM Matthew Wilcox <willy@infradead.org> wrote:
>>
>> On Wed, Sep 29, 2021 at 04:41:48PM -0700, Song Liu wrote:
>>> The issue is NOT caused by concurrent khugepaged:collapse_file() and
>>> truncate_pagecache(inode, 0). With some printks, we can see a clear
>>> time gap (>2 second )  between collapse_file() finishes, and
>>> truncate_pagecache() (which crashes soon). Therefore, my earlier
>>> suggestion that adds deny_write_access() to collapse_file() does NOT
>>> work.
>>>
>>> The crash is actually caused by concurrent truncate_pagecache(inode, 0).
>>> If I change the number of write thread in stress_madvise_dso.c to one,
>>> (IOW, one thread_read and one thread_write), I cannot reproduce the
>>> crash anymore.
>>>
>>> I think this means we cannot fix this issue in collapse_file(), because it
>>> finishes long before the crash.
>>
>> Ah!  So are we missing one or more of these locks:
>>
>>          inode_lock(inode);
>>          filemap_invalidate_lock(mapping);
>>
>> in the open path?
> 
> The following fixes the crash in my test. But I am not sure whether this is the
> best fix.
> 
> Rongwei, could you please run more tests on it?
Yes, I'd like to.
> 
> Thanks,
> Song
> 
> 
> diff --git i/fs/open.c w/fs/open.c
> index daa324606a41f..d13c4668b2e53 100644
> --- i/fs/open.c
> +++ w/fs/open.c
> @@ -856,8 +856,11 @@ static int do_dentry_open(struct file *f,
>                   * of THPs into the page cache will fail.
>                   */
>                  smp_mb();
> -               if (filemap_nr_thps(inode->i_mapping))
> +               if (filemap_nr_thps(inode->i_mapping)) {
> +                       filemap_invalidate_lock(inode->i_mapping);
Learned something, Thanks!

But, the race between collapse_file and truncate_pagecache, I am not 
sure whether it exists or not. If exists, whether this patch only can 
fix truncate_pagecache concurrent?

Anyway, I will run more tests on it at first.

Thanks!
>                          truncate_pagecache(inode, 0);
> +                       filemap_invalidate_unlock(inode->i_mapping);
> +               }
>          }
> 
>          return 0;
> 

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-30  1:54                         ` Rongwei Wang
@ 2021-09-30  3:26                           ` Song Liu
  2021-09-30  5:24                             ` Hugh Dickins
  0 siblings, 1 reply; 61+ messages in thread
From: Song Liu @ 2021-09-30  3:26 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: Matthew Wilcox, Andrew Morton, Linux MM,
	Linux Kernel Mailing List, William Kucharski, Hugh Dickins

On Wed, Sep 29, 2021 at 6:54 PM Rongwei Wang
<rongwei.wang@linux.alibaba.com> wrote:
>
>
>
> On 9/30/21 7:41 AM, Song Liu wrote:
> > On Wed, Sep 29, 2021 at 10:56 AM Matthew Wilcox <willy@infradead.org> wrote:
> >>
> > [...]
> >>> Now, I am able to crash the system on
> >>>      find_lock_entries () {
> >>>       ...
> >>>         VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
> >>>      }
> >>> I guess it is related. I will test more.
> >>
> >> That's a bogus VM_BUG_ON.  I have a patch in my tree to delete it.
> >> Andrew has it too, but for some reason, he hasn't sent it on to Linus.
> >>
> >> +++ b/mm/filemap.c
> >> @@ -2093,7 +2093,6 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
> >>                  if (!xa_is_value(page)) {
> >>                          if (page->index < start)
> >>                                  goto put;
> >> -                       VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
> >>                          if (page->index + thp_nr_pages(page) - 1 > end)
> >>                                  goto put;
> >>                          if (!trylock_page(page))
> >
> > Yes, after removing this line, I am able to see the same bug.
> >
> > Here is my finding so far:
> >
> > The issue is NOT caused by concurrent khugepaged:collapse_file() and
> > truncate_pagecache(inode, 0). With some printks, we can see a clear
> > time gap (>2 second )  between collapse_file() finishes, and
> > truncate_pagecache() (which crashes soon). Therefore, my earlier
> > suggestion that adds deny_write_access() to collapse_file() does NOT
> > work.
> >
> > The crash is actually caused by concurrent truncate_pagecache(inode, 0).
> > If I change the number of write thread in stress_madvise_dso.c to one,
> > (IOW, one thread_read and one thread_write), I cannot reproduce the
> > crash anymore.
> Whether CONFIG_DEBUG_VM is enabled in your vm?
>
> I think the second possibility mentioned above will been found if you
> enable CONFIG_DEBUG_VM:
>
> 1) multiple writers truncate the same page cache concurrently;
> 2) collapse_file rolls back when writer truncates the page cache;
>
> The following log will be print after enable CONFIG_DEBUG_VM:
>
> [22216.789904]  do_idle+0xb4/0x104
> [22216.789906]  cpu_startup_entry+0x34/0x9c
> [22216.790144] Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS
> 0.0.0 02/06/2015
> [22216.790553]  secondary_start_kernel+0x104/0x180
> [22216.790778] Call trace:
> [22216.791300] Code: d4210000 b0006161 910d4021 94013b45 (d4210000)
> [22216.791662]  dump_backtrace+0x0/0x1ec
> [22216.791664]  show_stack+0x24/0x30
> [22216.791956] ---[ end trace dc769a61c1af087b ]---
> [22216.792295]  dump_stack+0xd0/0x128
> [22216.792299]  bad_page+0xe4/0x110
> [22216.792579] Kernel panic - not syncing: Oops - BUG: Fatal exception
> in interrupt
> [22216.792937]  check_free_page_bad+0x84/0x90
> [22216.792940]  free_pcp_prepare+0x1fc/0x21c
> [22216.793253] SMP: stopping secondary CPUs
> [22216.793525]  free_unref_page+0x2c/0xec
> [22216.805537]  __put_page+0x60/0x70
> [22216.805931]  collapse_file+0xdc8/0x12f0
> [22216.806385]  khugepaged_scan_file+0x2dc/0x37c
> [22216.806900]  khugepaged_scan_mm_slot+0x2e0/0x380
> [22216.807450]  khugepaged_do_scan+0x2dc/0x2fc
> [22216.807946]  khugepaged+0x38/0x100
> [22216.808342]  kthread+0x11c/0x120
> [22216.808735] Kernel Offset: disabled
> [22216.809153] CPU features: 0x0040002,62208238
> [22216.809681] Memory Limit: none
> [22216.813477] Starting crashdump kernel...
>
> So I think the race also exists between collapse_file and
> truncate_pagecache.

I do have CONFIG_DEBUG_VM, but I haven't hit this issue yet.

Thanks,
Song

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-30  3:26                           ` Song Liu
@ 2021-09-30  5:24                             ` Hugh Dickins
  2021-09-30 15:28                               ` Matthew Wilcox
  0 siblings, 1 reply; 61+ messages in thread
From: Hugh Dickins @ 2021-09-30  5:24 UTC (permalink / raw)
  To: Song Liu
  Cc: Rongwei Wang, Matthew Wilcox, Andrew Morton, Linux MM,
	Linux Kernel Mailing List, William Kucharski, Hugh Dickins

On Wed, 29 Sep 2021, Song Liu wrote:
> On Wed, Sep 29, 2021 at 6:54 PM Rongwei Wang
> <rongwei.wang@linux.alibaba.com> wrote:
> > On 9/30/21 7:41 AM, Song Liu wrote:
> > > On Wed, Sep 29, 2021 at 10:56 AM Matthew Wilcox <willy@infradead.org> wrote:
> > >>
> > > [...]
> > >>> Now, I am able to crash the system on
> > >>>      find_lock_entries () {
> > >>>       ...
> > >>>         VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
> > >>>      }
> > >>> I guess it is related. I will test more.
> > >>
> > >> That's a bogus VM_BUG_ON.  I have a patch in my tree to delete it.
> > >> Andrew has it too, but for some reason, he hasn't sent it on to Linus.

I think Andrew has held back from sending it on to Linus because I pointed
out that the example Matthew cited (shmem and swap cache) was wrong, and
could not explain it: we wanted to understand what syzbot had actually
hit before sending on.

Would this bug be a good explanation for it?

In the meantime, independently, I was looking at fuse_try_move_page(),
which appears to do the old splice thievery that got disabled from splice
itself, stealing a page from one mapping to put into another.  I suspect
that could result in a page->index != xas.xa_index too (outside page lock).

> > >>
> > >> +++ b/mm/filemap.c
> > >> @@ -2093,7 +2093,6 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
> > >>                  if (!xa_is_value(page)) {
> > >>                          if (page->index < start)
> > >>                                  goto put;
> > >> -                       VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
> > >>                          if (page->index + thp_nr_pages(page) - 1 > end)
> > >>                                  goto put;
> > >>                          if (!trylock_page(page))
> > >
> > > Yes, after removing this line, I am able to see the same bug.
> > >
> > > Here is my finding so far:
> > >
> > > The issue is NOT caused by concurrent khugepaged:collapse_file() and
> > > truncate_pagecache(inode, 0). With some printks, we can see a clear
> > > time gap (>2 second )  between collapse_file() finishes, and
> > > truncate_pagecache() (which crashes soon). Therefore, my earlier
> > > suggestion that adds deny_write_access() to collapse_file() does NOT
> > > work.
> > >
> > > The crash is actually caused by concurrent truncate_pagecache(inode, 0).
> > > If I change the number of write thread in stress_madvise_dso.c to one,
> > > (IOW, one thread_read and one thread_write), I cannot reproduce the
> > > crash anymore.
> > Whether CONFIG_DEBUG_VM is enabled in your vm?
> >
> > I think the second possibility mentioned above will been found if you
> > enable CONFIG_DEBUG_VM:
> >
> > 1) multiple writers truncate the same page cache concurrently;
> > 2) collapse_file rolls back when writer truncates the page cache;
> >
> > The following log will be print after enable CONFIG_DEBUG_VM:
> >
> > [22216.789904]  do_idle+0xb4/0x104
> > [22216.789906]  cpu_startup_entry+0x34/0x9c
> > [22216.790144] Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS
> > 0.0.0 02/06/2015
> > [22216.790553]  secondary_start_kernel+0x104/0x180
> > [22216.790778] Call trace:
> > [22216.791300] Code: d4210000 b0006161 910d4021 94013b45 (d4210000)
> > [22216.791662]  dump_backtrace+0x0/0x1ec
> > [22216.791664]  show_stack+0x24/0x30
> > [22216.791956] ---[ end trace dc769a61c1af087b ]---
> > [22216.792295]  dump_stack+0xd0/0x128
> > [22216.792299]  bad_page+0xe4/0x110
> > [22216.792579] Kernel panic - not syncing: Oops - BUG: Fatal exception
> > in interrupt
> > [22216.792937]  check_free_page_bad+0x84/0x90
> > [22216.792940]  free_pcp_prepare+0x1fc/0x21c
> > [22216.793253] SMP: stopping secondary CPUs
> > [22216.793525]  free_unref_page+0x2c/0xec
> > [22216.805537]  __put_page+0x60/0x70
> > [22216.805931]  collapse_file+0xdc8/0x12f0
> > [22216.806385]  khugepaged_scan_file+0x2dc/0x37c
> > [22216.806900]  khugepaged_scan_mm_slot+0x2e0/0x380
> > [22216.807450]  khugepaged_do_scan+0x2dc/0x2fc
> > [22216.807946]  khugepaged+0x38/0x100
> > [22216.808342]  kthread+0x11c/0x120
> > [22216.808735] Kernel Offset: disabled
> > [22216.809153] CPU features: 0x0040002,62208238
> > [22216.809681] Memory Limit: none
> > [22216.813477] Starting crashdump kernel...
> >
> > So I think the race also exists between collapse_file and
> > truncate_pagecache.
> 
> I do have CONFIG_DEBUG_VM, but I haven't hit this issue yet.

Sorry, it's taken me a long time to get into this bug(s).

I haven't tried to reproduce it, but I do think that Rongwei will
be proved right.

In doing a lockless lookup of the page cache, we tend to imagine
that the THP head page will be encountered first, and the special
treatment for the head will do the right thing to skip the tails.

But when racing against collapse_file()'s rewind, I agree with
Rongwei that it is possible for truncation (or page cache cleanup
in this instance) to collect a pagevec which starts with a PageTail
some way into the compound page.

shmem_undo_range() (which shmem uses rather than truncate_pagecache())
would not call truncate_inode_page() on a THP tail: if it encounters a
tail, it will try to split the THP, and not call truncate_inode_page()
if it cannot.  Unless I'm inventing the memory, I now think that I did
encounter this race between truncate and collapse on huge shmem, and
had to re-craft my shmem_punch_compound() to handle it correctly.

If it is just a matter of collapse_file() rewind, I suppose we could
reverse the direction in which that proceeds; but I'm not convinced
that would be enough, and don't think we need such a "big" change.

Aside from the above page->index mischeck in find_lock_entries(),
I now think this bug needs nothing more than simply removing the
VM_BUG_ON_PAGE(PageTail(page), page) from truncate_inode_page().

(You could say move its page->mapping check before its PageTail
check; but the PageTail check would then never catch anything.)

Rongwei's patch went in the right direction, but why add N lines
if deleting one is good?  And for a while I thought that idea of
using filemap_invalidate_lock() was very good; but now think
the page lock we already have is better, and solve both races.

Hugh

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-30  5:24                             ` Hugh Dickins
@ 2021-09-30 15:28                               ` Matthew Wilcox
  2021-09-30 16:49                                 ` Hugh Dickins
  0 siblings, 1 reply; 61+ messages in thread
From: Matthew Wilcox @ 2021-09-30 15:28 UTC (permalink / raw)
  To: Hugh Dickins
  Cc: Song Liu, Rongwei Wang, Andrew Morton, Linux MM,
	Linux Kernel Mailing List, William Kucharski

On Wed, Sep 29, 2021 at 10:24:44PM -0700, Hugh Dickins wrote:
> On Wed, 29 Sep 2021, Song Liu wrote:
> > On Wed, Sep 29, 2021 at 6:54 PM Rongwei Wang
> > <rongwei.wang@linux.alibaba.com> wrote:
> > > On 9/30/21 7:41 AM, Song Liu wrote:
> > > > On Wed, Sep 29, 2021 at 10:56 AM Matthew Wilcox <willy@infradead.org> wrote:
> > > >>
> > > > [...]
> > > >>> Now, I am able to crash the system on
> > > >>>      find_lock_entries () {
> > > >>>       ...
> > > >>>         VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
> > > >>>      }
> > > >>> I guess it is related. I will test more.
> > > >>
> > > >> That's a bogus VM_BUG_ON.  I have a patch in my tree to delete it.
> > > >> Andrew has it too, but for some reason, he hasn't sent it on to Linus.
> 
> I think Andrew has held back from sending it on to Linus because I pointed
> out that the example Matthew cited (shmem and swap cache) was wrong, and
> could not explain it: we wanted to understand what syzbot had actually
> hit before sending on.
> 
> Would this bug be a good explanation for it?

I don't think so?  Even if that specific example is not what's happening,
the general principle is that you can't verify page->index until you're
holding the page lock.  So the VM_BUG_ON is definitely in the wrong place.

> In the meantime, independently, I was looking at fuse_try_move_page(),
> which appears to do the old splice thievery that got disabled from splice
> itself, stealing a page from one mapping to put into another.  I suspect
> that could result in a page->index != xas.xa_index too (outside page lock).

I think there are other examples too where page->index gets changed ...
they're not springing to mind right now, but I have some other intricate
details occupying that bit of my brain at the moment.

> > > I think the second possibility mentioned above will been found if you
> > > enable CONFIG_DEBUG_VM:
> > >
> > > 1) multiple writers truncate the same page cache concurrently;
> > > 2) collapse_file rolls back when writer truncates the page cache;
> > >
> > > The following log will be print after enable CONFIG_DEBUG_VM:
> > >
> > > [22216.789904]  do_idle+0xb4/0x104
> > > [22216.789906]  cpu_startup_entry+0x34/0x9c
> > > [22216.790144] Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS
> > > 0.0.0 02/06/2015
> > > [22216.790553]  secondary_start_kernel+0x104/0x180
> > > [22216.790778] Call trace:
> > > [22216.791300] Code: d4210000 b0006161 910d4021 94013b45 (d4210000)
> > > [22216.791662]  dump_backtrace+0x0/0x1ec
> > > [22216.791664]  show_stack+0x24/0x30
> > > [22216.791956] ---[ end trace dc769a61c1af087b ]---
> > > [22216.792295]  dump_stack+0xd0/0x128
> > > [22216.792299]  bad_page+0xe4/0x110
> > > [22216.792579] Kernel panic - not syncing: Oops - BUG: Fatal exception
> > > in interrupt
> > > [22216.792937]  check_free_page_bad+0x84/0x90
> > > [22216.792940]  free_pcp_prepare+0x1fc/0x21c
> > > [22216.793253] SMP: stopping secondary CPUs
> > > [22216.793525]  free_unref_page+0x2c/0xec
> > > [22216.805537]  __put_page+0x60/0x70
> > > [22216.805931]  collapse_file+0xdc8/0x12f0
> > > [22216.806385]  khugepaged_scan_file+0x2dc/0x37c
> > > [22216.806900]  khugepaged_scan_mm_slot+0x2e0/0x380
> > > [22216.807450]  khugepaged_do_scan+0x2dc/0x2fc
> > > [22216.807946]  khugepaged+0x38/0x100
> > > [22216.808342]  kthread+0x11c/0x120
> > > [22216.808735] Kernel Offset: disabled
> > > [22216.809153] CPU features: 0x0040002,62208238
> > > [22216.809681] Memory Limit: none
> > > [22216.813477] Starting crashdump kernel...
> > >
> > > So I think the race also exists between collapse_file and
> > > truncate_pagecache.
> > 
> > I do have CONFIG_DEBUG_VM, but I haven't hit this issue yet.
> 
> Sorry, it's taken me a long time to get into this bug(s).
> 
> I haven't tried to reproduce it, but I do think that Rongwei will
> be proved right.
> 
> In doing a lockless lookup of the page cache, we tend to imagine
> that the THP head page will be encountered first, and the special
> treatment for the head will do the right thing to skip the tails.
> 
> But when racing against collapse_file()'s rewind, I agree with
> Rongwei that it is possible for truncation (or page cache cleanup
> in this instance) to collect a pagevec which starts with a PageTail
> some way into the compound page.
> 
> shmem_undo_range() (which shmem uses rather than truncate_pagecache())
> would not call truncate_inode_page() on a THP tail: if it encounters a
> tail, it will try to split the THP, and not call truncate_inode_page()
> if it cannot.  Unless I'm inventing the memory, I now think that I did
> encounter this race between truncate and collapse on huge shmem, and
> had to re-craft my shmem_punch_compound() to handle it correctly.
> 
> If it is just a matter of collapse_file() rewind, I suppose we could
> reverse the direction in which that proceeds; but I'm not convinced
> that would be enough, and don't think we need such a "big" change.
> 
> Aside from the above page->index mischeck in find_lock_entries(),
> I now think this bug needs nothing more than simply removing the
> VM_BUG_ON_PAGE(PageTail(page), page) from truncate_inode_page().

I don't think that's right.  This bug was also observed when calling
truncate(), so there's clearly a situation where two concurrent calls
to truncate_pagecache() leaves a THP in the cache.

Unless there's a case where mapping->nr_thps gets corrupted, so the
open() thinks there's no THPs in the page cache, when there's actually
one or more?  That might be a problem that we're solving by locking
around the truncate_pagecache() call?

> (You could say move its page->mapping check before its PageTail
> check; but the PageTail check would then never catch anything.)
> 
> Rongwei's patch went in the right direction, but why add N lines
> if deleting one is good?  And for a while I thought that idea of
> using filemap_invalidate_lock() was very good; but now think
> the page lock we already have is better, and solve both races.
> 
> Hugh

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-30 15:28                               ` Matthew Wilcox
@ 2021-09-30 16:49                                 ` Hugh Dickins
  2021-09-30 17:39                                   ` Yang Shi
  2021-10-02  2:22                                   ` Rongwei Wang
  0 siblings, 2 replies; 61+ messages in thread
From: Hugh Dickins @ 2021-09-30 16:49 UTC (permalink / raw)
  To: Matthew Wilcox
  Cc: Hugh Dickins, Song Liu, Rongwei Wang, Andrew Morton, Linux MM,
	Linux Kernel Mailing List, William Kucharski

On Thu, 30 Sep 2021, Matthew Wilcox wrote:
> On Wed, Sep 29, 2021 at 10:24:44PM -0700, Hugh Dickins wrote:
> > 
> > Aside from the above page->index mischeck in find_lock_entries(),
> > I now think this bug needs nothing more than simply removing the
> > VM_BUG_ON_PAGE(PageTail(page), page) from truncate_inode_page().
> 
> I don't think that's right.  This bug was also observed when calling
> truncate(), so there's clearly a situation where two concurrent calls
> to truncate_pagecache() leaves a THP in the cache.

I assume you're thinking of one of the fuzzer blkdev ones:
https://lore.kernel.org/linux-mm/CACkBjsbtF_peC7N_4mRfHML_BeiPe+O9DahTfr84puSG_J9rcQ@mail.gmail.com/
or
https://lore.kernel.org/lkml/CACkBjsYwLYLRmX8GpsDpMthagWOjWWrNxqY6ZLNQVr6yx+f5vA@mail.gmail.com/

I haven't started on those ones yet: yes, I imagine one or both of those
will need a further fix (S_ISREG() check somewhere if we're lucky; but
could well be nastier); but for the bug in this thread, I expect
removing the VM_BUG_ON_PAGE(PageTail) to be enough.

If you're thinking of something else, please send a link if you can - thanks.

Hugh

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-30 16:49                                 ` Hugh Dickins
@ 2021-09-30 17:39                                   ` Yang Shi
  2021-10-02 17:08                                     ` Matthew Wilcox
  2021-10-02  2:22                                   ` Rongwei Wang
  1 sibling, 1 reply; 61+ messages in thread
From: Yang Shi @ 2021-09-30 17:39 UTC (permalink / raw)
  To: Hugh Dickins
  Cc: Matthew Wilcox, Song Liu, Rongwei Wang, Andrew Morton, Linux MM,
	Linux Kernel Mailing List, William Kucharski

On Thu, Sep 30, 2021 at 9:49 AM Hugh Dickins <hughd@google.com> wrote:
>
> On Thu, 30 Sep 2021, Matthew Wilcox wrote:
> > On Wed, Sep 29, 2021 at 10:24:44PM -0700, Hugh Dickins wrote:
> > >
> > > Aside from the above page->index mischeck in find_lock_entries(),
> > > I now think this bug needs nothing more than simply removing the
> > > VM_BUG_ON_PAGE(PageTail(page), page) from truncate_inode_page().
> >
> > I don't think that's right.  This bug was also observed when calling
> > truncate(), so there's clearly a situation where two concurrent calls
> > to truncate_pagecache() leaves a THP in the cache.
>
> I assume you're thinking of one of the fuzzer blkdev ones:
> https://lore.kernel.org/linux-mm/CACkBjsbtF_peC7N_4mRfHML_BeiPe+O9DahTfr84puSG_J9rcQ@mail.gmail.com/
> or
> https://lore.kernel.org/lkml/CACkBjsYwLYLRmX8GpsDpMthagWOjWWrNxqY6ZLNQVr6yx+f5vA@mail.gmail.com/
>
> I haven't started on those ones yet: yes, I imagine one or both of those
> will need a further fix (S_ISREG() check somewhere if we're lucky; but
> could well be nastier); but for the bug in this thread, I expect

Makes sense to me. We should be able to check S_ISREG() in khugepaged,
if it is not a regular file, just bail out. Sounds not that nasty to
me AFAIU.

> removing the VM_BUG_ON_PAGE(PageTail) to be enough.
>
> If you're thinking of something else, please send a link if you can - thanks.
>
> Hugh
>

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-30 16:49                                 ` Hugh Dickins
  2021-09-30 17:39                                   ` Yang Shi
@ 2021-10-02  2:22                                   ` Rongwei Wang
  1 sibling, 0 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-10-02  2:22 UTC (permalink / raw)
  To: Hugh Dickins, Matthew Wilcox
  Cc: Song Liu, Andrew Morton, Linux MM, Linux Kernel Mailing List,
	William Kucharski



On 10/1/21 12:49 AM, Hugh Dickins wrote:
> On Thu, 30 Sep 2021, Matthew Wilcox wrote:
>> On Wed, Sep 29, 2021 at 10:24:44PM -0700, Hugh Dickins wrote:
>>>
>>> Aside from the above page->index mischeck in find_lock_entries(),
>>> I now think this bug needs nothing more than simply removing the
>>> VM_BUG_ON_PAGE(PageTail(page), page) from truncate_inode_page().
>>
>> I don't think that's right.  This bug was also observed when calling
>> truncate(), so there's clearly a situation where two concurrent calls
>> to truncate_pagecache() leaves a THP in the cache.
> 
> I assume you're thinking of one of the fuzzer blkdev ones:
> https://lore.kernel.org/linux-mm/CACkBjsbtF_peC7N_4mRfHML_BeiPe+O9DahTfr84puSG_J9rcQ@mail.gmail.com/
> or
> https://lore.kernel.org/lkml/CACkBjsYwLYLRmX8GpsDpMthagWOjWWrNxqY6ZLNQVr6yx+f5vA@mail.gmail.com/
> 
> I haven't started on those ones yet: yes, I imagine one or both of those
> will need a further fix (S_ISREG() check somewhere if we're lucky; but
> could well be nastier); but for the bug in this thread, I expect
> removing the VM_BUG_ON_PAGE(PageTail) to be enough.
Thanks for your advices!

I'm so sorry that delay the test due to my recent vacation. I plan to 
start further test tomorrow. I think removing the 
VM_BUG_ON_PAGE(PageTail) is a good idea, but also think using 
filemap_invalidate_lock is safer and necessary. And of course, this is 
just my own view! So, now, I tend to use filemap_invalidate_lock and
either check page mapping again or remove VM_BUG_ON_PAGE(PageTail).

Anyway, I will run more tests and then give feedback.

Thanks!
> 
> If you're thinking of something else, please send a link if you can - thanks.
> 
> Hugh
> 

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-30 17:39                                   ` Yang Shi
@ 2021-10-02 17:08                                     ` Matthew Wilcox
  2021-10-04 18:28                                       ` Yang Shi
  0 siblings, 1 reply; 61+ messages in thread
From: Matthew Wilcox @ 2021-10-02 17:08 UTC (permalink / raw)
  To: Yang Shi
  Cc: Hugh Dickins, Song Liu, Rongwei Wang, Andrew Morton, Linux MM,
	Linux Kernel Mailing List, William Kucharski

On Thu, Sep 30, 2021 at 10:39:14AM -0700, Yang Shi wrote:
> On Thu, Sep 30, 2021 at 9:49 AM Hugh Dickins <hughd@google.com> wrote:
> > I assume you're thinking of one of the fuzzer blkdev ones:
> > https://lore.kernel.org/linux-mm/CACkBjsbtF_peC7N_4mRfHML_BeiPe+O9DahTfr84puSG_J9rcQ@mail.gmail.com/
> > or
> > https://lore.kernel.org/lkml/CACkBjsYwLYLRmX8GpsDpMthagWOjWWrNxqY6ZLNQVr6yx+f5vA@mail.gmail.com/
> >
> > I haven't started on those ones yet: yes, I imagine one or both of those
> > will need a further fix (S_ISREG() check somewhere if we're lucky; but
> > could well be nastier); but for the bug in this thread, I expect
> 
> Makes sense to me. We should be able to check S_ISREG() in khugepaged,
> if it is not a regular file, just bail out. Sounds not that nasty to
> me AFAIU.

I don't see why we should have an S_ISREG() check.  I agree it's not the
intended usecase, but it ought to work fine.  Unless there's something
I'm missing?

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-09-30  0:41                           ` Song Liu
  2021-09-30  2:14                             ` Rongwei Wang
@ 2021-10-04 17:26                             ` Rongwei Wang
  2021-10-04 19:05                               ` Matthew Wilcox
                                                 ` (2 more replies)
  1 sibling, 3 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-10-04 17:26 UTC (permalink / raw)
  To: Song Liu, Matthew Wilcox, Hugh Dickins
  Cc: Andrew Morton, Linux MM, Linux Kernel Mailing List, William Kucharski

Hi,
I have run our cases these two days to stress test new Patch #1. The new 
Patch #1 mainly add filemap_invalidate_{un}lock before and after 
truncate_pagecache(), basing on original Patch #1. And the crash has not 
happened.

Now, I keep the original Patch #1, then adding the code below which 
suggested by liu song (I'm not sure which one I should add in the next 
version, Suggested-by or Signed-off-by? If you know, please remind me).

-               if (filemap_nr_thps(inode->i_mapping))
+               if (filemap_nr_thps(inode->i_mapping)) {
+                       filemap_invalidate_lock(inode->i_mapping);
                         truncate_pagecache(inode, 0);
+                       filemap_invalidate_unlock(inode->i_mapping);
+               }

And the reason for keeping the original Patch #1 is mainly to fix the 
race between collapse_file and truncate_pagecache. It seems necessary. 
Despite the two-day test, I did not reproduce this race any more.

In addition, I also test the below method:

diff --git a/mm/truncate.c b/mm/truncate.c
index 3f47190f98a8..33604e4ce60a 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -210,8 +210,6 @@ invalidate_complete_page(struct address_space 
*mapping, struct page *page)

  int truncate_inode_page(struct address_space *mapping, struct page *page)
  {
-       VM_BUG_ON_PAGE(PageTail(page), page);
-
         if (page->mapping != mapping)
                 return -EIO;

I am not very sure this VM_BUG_ON_PAGE(PageTail) is what Hugh means. And
the test results show that only removing this VM_BUG_ON_PAGE(PageTail) 
has no effect. So, I still keep the original Patch #1 to fix one race.

I plan to send Patch v3 after receiving your reply.

Thanks!

On 9/30/21 8:41 AM, Song Liu wrote:
> On Wed, Sep 29, 2021 at 5:02 PM Matthew Wilcox <willy@infradead.org> wrote:
>>
>> On Wed, Sep 29, 2021 at 04:41:48PM -0700, Song Liu wrote:
>>> The issue is NOT caused by concurrent khugepaged:collapse_file() and
>>> truncate_pagecache(inode, 0). With some printks, we can see a clear
>>> time gap (>2 second )  between collapse_file() finishes, and
>>> truncate_pagecache() (which crashes soon). Therefore, my earlier
>>> suggestion that adds deny_write_access() to collapse_file() does NOT
>>> work.
>>>
>>> The crash is actually caused by concurrent truncate_pagecache(inode, 0).
>>> If I change the number of write thread in stress_madvise_dso.c to one,
>>> (IOW, one thread_read and one thread_write), I cannot reproduce the
>>> crash anymore.
>>>
>>> I think this means we cannot fix this issue in collapse_file(), because it
>>> finishes long before the crash.
>>
>> Ah!  So are we missing one or more of these locks:
>>
>>          inode_lock(inode);
>>          filemap_invalidate_lock(mapping);
>>
>> in the open path?
> 
> The following fixes the crash in my test. But I am not sure whether this is the
> best fix.
> 
> Rongwei, could you please run more tests on it?
> 
> Thanks,
> Song
> 
> 
> diff --git i/fs/open.c w/fs/open.c
> index daa324606a41f..d13c4668b2e53 100644
> --- i/fs/open.c
> +++ w/fs/open.c
> @@ -856,8 +856,11 @@ static int do_dentry_open(struct file *f,
>                   * of THPs into the page cache will fail.
>                   */
>                  smp_mb();
> -               if (filemap_nr_thps(inode->i_mapping))
> +               if (filemap_nr_thps(inode->i_mapping)) {
> +                       filemap_invalidate_lock(inode->i_mapping);
>                          truncate_pagecache(inode, 0);
> +                       filemap_invalidate_unlock(inode->i_mapping);
> +               }
>          }
> 
>          return 0;
> 

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-10-02 17:08                                     ` Matthew Wilcox
@ 2021-10-04 18:28                                       ` Yang Shi
  2021-10-04 19:31                                         ` Matthew Wilcox
  0 siblings, 1 reply; 61+ messages in thread
From: Yang Shi @ 2021-10-04 18:28 UTC (permalink / raw)
  To: Matthew Wilcox
  Cc: Hugh Dickins, Song Liu, Rongwei Wang, Andrew Morton, Linux MM,
	Linux Kernel Mailing List, William Kucharski

On Sat, Oct 2, 2021 at 10:09 AM Matthew Wilcox <willy@infradead.org> wrote:
>
> On Thu, Sep 30, 2021 at 10:39:14AM -0700, Yang Shi wrote:
> > On Thu, Sep 30, 2021 at 9:49 AM Hugh Dickins <hughd@google.com> wrote:
> > > I assume you're thinking of one of the fuzzer blkdev ones:
> > > https://lore.kernel.org/linux-mm/CACkBjsbtF_peC7N_4mRfHML_BeiPe+O9DahTfr84puSG_J9rcQ@mail.gmail.com/
> > > or
> > > https://lore.kernel.org/lkml/CACkBjsYwLYLRmX8GpsDpMthagWOjWWrNxqY6ZLNQVr6yx+f5vA@mail.gmail.com/
> > >
> > > I haven't started on those ones yet: yes, I imagine one or both of those
> > > will need a further fix (S_ISREG() check somewhere if we're lucky; but
> > > could well be nastier); but for the bug in this thread, I expect
> >
> > Makes sense to me. We should be able to check S_ISREG() in khugepaged,
> > if it is not a regular file, just bail out. Sounds not that nasty to
> > me AFAIU.
>
> I don't see why we should have an S_ISREG() check.  I agree it's not the
> intended usecase, but it ought to work fine.  Unless there's something
> I'm missing?

Check out this bug report:
https://lore.kernel.org/lkml/CACkBjsYwLYLRmX8GpsDpMthagWOjWWrNxqY6ZLNQVr6yx+f5vA@mail.gmail.com/
and the patch from me:
https://lore.kernel.org/linux-mm/20210917205731.262693-1-shy828301@gmail.com/

I don't think we handle buffers correctly for file THP, right? My
patch is ad hoc, so I thought Hugh's suggestion makes some sense to
me. Why do we have THP collapsed for unintended usecase in the first
place?

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-10-04 17:26                             ` Rongwei Wang
@ 2021-10-04 19:05                               ` Matthew Wilcox
  2021-10-05  1:58                                 ` Rongwei Wang
  2021-10-04 20:26                               ` Song Liu
  2021-10-05  2:58                               ` Hugh Dickins
  2 siblings, 1 reply; 61+ messages in thread
From: Matthew Wilcox @ 2021-10-04 19:05 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: Song Liu, Hugh Dickins, Andrew Morton, Linux MM,
	Linux Kernel Mailing List, William Kucharski

On Tue, Oct 05, 2021 at 01:26:50AM +0800, Rongwei Wang wrote:
> Hi,
> I have run our cases these two days to stress test new Patch #1. The new
> Patch #1 mainly add filemap_invalidate_{un}lock before and after
> truncate_pagecache(), basing on original Patch #1. And the crash has not
> happened.

You shouldn't need most of patch 1.

In fact, the only two patches you should need would be this:

+++ b/mm/filemap.c
@@ -2093,7 +2093,6 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
                if (!xa_is_value(page)) {
                        if (page->index < start)
                                goto put;
-                       VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
                        if (page->index + thp_nr_pages(page) - 1 > end)
                                goto put;
                        if (!trylock_page(page))

(already in Andrew's tree) and:

> -               if (filemap_nr_thps(inode->i_mapping))
> +               if (filemap_nr_thps(inode->i_mapping)) {
> +                       filemap_invalidate_lock(inode->i_mapping);
>                         truncate_pagecache(inode, 0);
> +                       filemap_invalidate_unlock(inode->i_mapping);
> +               }

If you can still hit a bug with just those two patches, then something
else is going wrong, and needs to be investigated.

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-10-04 18:28                                       ` Yang Shi
@ 2021-10-04 19:31                                         ` Matthew Wilcox
  2021-10-05  2:26                                           ` Hugh Dickins
  0 siblings, 1 reply; 61+ messages in thread
From: Matthew Wilcox @ 2021-10-04 19:31 UTC (permalink / raw)
  To: Yang Shi
  Cc: Hao Sun, Hugh Dickins, Song Liu, Rongwei Wang, Andrew Morton,
	Linux MM, Linux Kernel Mailing List, William Kucharski

On Mon, Oct 04, 2021 at 11:28:45AM -0700, Yang Shi wrote:
> On Sat, Oct 2, 2021 at 10:09 AM Matthew Wilcox <willy@infradead.org> wrote:
> >
> > On Thu, Sep 30, 2021 at 10:39:14AM -0700, Yang Shi wrote:
> > > On Thu, Sep 30, 2021 at 9:49 AM Hugh Dickins <hughd@google.com> wrote:
> > > > I assume you're thinking of one of the fuzzer blkdev ones:
> > > > https://lore.kernel.org/linux-mm/CACkBjsbtF_peC7N_4mRfHML_BeiPe+O9DahTfr84puSG_J9rcQ@mail.gmail.com/
> > > > or
> > > > https://lore.kernel.org/lkml/CACkBjsYwLYLRmX8GpsDpMthagWOjWWrNxqY6ZLNQVr6yx+f5vA@mail.gmail.com/
> > > >
> > > > I haven't started on those ones yet: yes, I imagine one or both of those
> > > > will need a further fix (S_ISREG() check somewhere if we're lucky; but
> > > > could well be nastier); but for the bug in this thread, I expect
> > >
> > > Makes sense to me. We should be able to check S_ISREG() in khugepaged,
> > > if it is not a regular file, just bail out. Sounds not that nasty to
> > > me AFAIU.
> >
> > I don't see why we should have an S_ISREG() check.  I agree it's not the
> > intended usecase, but it ought to work fine.  Unless there's something
> > I'm missing?
> 
> Check out this bug report:
> https://lore.kernel.org/lkml/CACkBjsYwLYLRmX8GpsDpMthagWOjWWrNxqY6ZLNQVr6yx+f5vA@mail.gmail.com/
> and the patch from me:
> https://lore.kernel.org/linux-mm/20210917205731.262693-1-shy828301@gmail.com/
> 
> I don't think we handle buffers correctly for file THP, right? My
> patch is ad hoc, so I thought Hugh's suggestion makes some sense to
> me. Why do we have THP collapsed for unintended usecase in the first
> place?

OK, I've done some more digging.  I think what's going on with this
report is userspace opens the block device RO, causes the page cache to
be loaded with data, then khugepaged comes in and creates THPs.
What confuses me is that these THPs have private data attached to them.
I don't know how that happens.  If it's block device specific, then
yes, something like your S_ISREG() idea should work fine.  Otherwise,
we might need to track down another problem.

Hao Sun, can you try this patch and see what comes out of it?

diff --git a/fs/buffer.c b/fs/buffer.c
index c615387aedca..fefe05a9973d 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -872,6 +872,7 @@ link_dev_buffers(struct page *page, struct buffer_head *head)
 		bh = bh->b_this_page;
 	} while (bh);
 	tail->b_this_page = head;
+	VM_BUG_ON_PAGE(PageCompound(page), page);
 	attach_page_private(page, head);
 }
 
@@ -1577,6 +1578,7 @@ void create_empty_buffers(struct page *page,
 			bh = bh->b_this_page;
 		} while (bh != head);
 	}
+	VM_BUG_ON_PAGE(PageCompound(page), page);
 	attach_page_private(page, head);
 	spin_unlock(&page->mapping->private_lock);
 }
@@ -2565,6 +2567,7 @@ static void attach_nobh_buffers(struct page *page, struct buffer_head *head)
 			bh->b_this_page = head;
 		bh = bh->b_this_page;
 	} while (bh != head);
+	VM_BUG_ON_PAGE(PageCompound(page), page);
 	attach_page_private(page, head);
 	spin_unlock(&page->mapping->private_lock);
 }

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-10-04 17:26                             ` Rongwei Wang
  2021-10-04 19:05                               ` Matthew Wilcox
@ 2021-10-04 20:26                               ` Song Liu
  2021-10-05  2:58                               ` Hugh Dickins
  2 siblings, 0 replies; 61+ messages in thread
From: Song Liu @ 2021-10-04 20:26 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: Matthew Wilcox, Hugh Dickins, Andrew Morton, Linux MM,
	Linux Kernel Mailing List, William Kucharski

On Mon, Oct 4, 2021 at 10:26 AM Rongwei Wang
<rongwei.wang@linux.alibaba.com> wrote:
>
> Hi,
> I have run our cases these two days to stress test new Patch #1. The new
> Patch #1 mainly add filemap_invalidate_{un}lock before and after
> truncate_pagecache(), basing on original Patch #1. And the crash has not
> happened.
>
> Now, I keep the original Patch #1, then adding the code below which
> suggested by liu song (I'm not sure which one I should add in the next
> version, Suggested-by or Signed-off-by? If you know, please remind me).
>
> -               if (filemap_nr_thps(inode->i_mapping))
> +               if (filemap_nr_thps(inode->i_mapping)) {
> +                       filemap_invalidate_lock(inode->i_mapping);
>                          truncate_pagecache(inode, 0);
> +                       filemap_invalidate_unlock(inode->i_mapping);
> +               }

It is mostly suggested by Matthew. If the patch goes that way, you can add

Tested-by: Song Liu <song@kernel.org>

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-10-04 19:05                               ` Matthew Wilcox
@ 2021-10-05  1:58                                 ` Rongwei Wang
  0 siblings, 0 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-10-05  1:58 UTC (permalink / raw)
  To: Matthew Wilcox
  Cc: Song Liu, Hugh Dickins, Andrew Morton, Linux MM,
	Linux Kernel Mailing List, William Kucharski



On 10/5/21 3:05 AM, Matthew Wilcox wrote:
> On Tue, Oct 05, 2021 at 01:26:50AM +0800, Rongwei Wang wrote:
>> Hi,
>> I have run our cases these two days to stress test new Patch #1. The new
>> Patch #1 mainly add filemap_invalidate_{un}lock before and after
>> truncate_pagecache(), basing on original Patch #1. And the crash has not
>> happened.
> 
> You shouldn't need most of patch 1.
> 
> In fact, the only two patches you should need would be this:
> 
> +++ b/mm/filemap.c
> @@ -2093,7 +2093,6 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
>                  if (!xa_is_value(page)) {
>                          if (page->index < start)
>                                  goto put;
> -                       VM_BUG_ON_PAGE(page->index != xas.xa_index, page);
>                          if (page->index + thp_nr_pages(page) - 1 > end)
>                                  goto put;
>                          if (!trylock_page(page))
> 
> (already in Andrew's tree) and:
> 
>> -               if (filemap_nr_thps(inode->i_mapping))
>> +               if (filemap_nr_thps(inode->i_mapping)) {
>> +                       filemap_invalidate_lock(inode->i_mapping);
>>                          truncate_pagecache(inode, 0);
>> +                       filemap_invalidate_unlock(inode->i_mapping);
>> +               }
> 
> If you can still hit a bug with just those two patches, then something
> else is going wrong, and needs to be investigated.
OK, I see what your mean. I will send Patch v3 and only keep 
filemap_invalidate_{un}lock in Patch #1.

Thanks!
> 

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-10-04 19:31                                         ` Matthew Wilcox
@ 2021-10-05  2:26                                           ` Hugh Dickins
  0 siblings, 0 replies; 61+ messages in thread
From: Hugh Dickins @ 2021-10-05  2:26 UTC (permalink / raw)
  To: Matthew Wilcox
  Cc: Yang Shi, Hao Sun, Hugh Dickins, Song Liu, Rongwei Wang,
	Andrew Morton, Linux MM, Linux Kernel Mailing List,
	William Kucharski

On Mon, 4 Oct 2021, Matthew Wilcox wrote:
> On Mon, Oct 04, 2021 at 11:28:45AM -0700, Yang Shi wrote:
> > On Sat, Oct 2, 2021 at 10:09 AM Matthew Wilcox <willy@infradead.org> wrote:
> > > On Thu, Sep 30, 2021 at 10:39:14AM -0700, Yang Shi wrote:
> > > > On Thu, Sep 30, 2021 at 9:49 AM Hugh Dickins <hughd@google.com> wrote:
> > > > > I assume you're thinking of one of the fuzzer blkdev ones:
> > > > > https://lore.kernel.org/linux-mm/CACkBjsbtF_peC7N_4mRfHML_BeiPe+O9DahTfr84puSG_J9rcQ@mail.gmail.com/
> > > > > or
> > > > > https://lore.kernel.org/lkml/CACkBjsYwLYLRmX8GpsDpMthagWOjWWrNxqY6ZLNQVr6yx+f5vA@mail.gmail.com/
> > > > >
> > > > > I haven't started on those ones yet: yes, I imagine one or both of those
> > > > > will need a further fix (S_ISREG() check somewhere if we're lucky; but
> > > > > could well be nastier); but for the bug in this thread, I expect
> > > >
> > > > Makes sense to me. We should be able to check S_ISREG() in khugepaged,
> > > > if it is not a regular file, just bail out. Sounds not that nasty to
> > > > me AFAIU.
> > >
> > > I don't see why we should have an S_ISREG() check.  I agree it's not the
> > > intended usecase, but it ought to work fine.  Unless there's something
> > > I'm missing?
> > 
> > Check out this bug report:
> > https://lore.kernel.org/lkml/CACkBjsYwLYLRmX8GpsDpMthagWOjWWrNxqY6ZLNQVr6yx+f5vA@mail.gmail.com/
> > and the patch from me:
> > https://lore.kernel.org/linux-mm/20210917205731.262693-1-shy828301@gmail.com/
> > 
> > I don't think we handle buffers correctly for file THP, right? My
> > patch is ad hoc, so I thought Hugh's suggestion makes some sense to
> > me. Why do we have THP collapsed for unintended usecase in the first
> > place?
> 
> OK, I've done some more digging.  I think what's going on with this
> report is userspace opens the block device RO, causes the page cache to
> be loaded with data, then khugepaged comes in and creates THPs.

Yes.

> What confuses me is that these THPs have private data attached to them.
> I don't know how that happens.  If it's block device specific, then
> yes, something like your S_ISREG() idea should work fine.  Otherwise,
> we might need to track down another problem.

Agreed, the file THP is created without PagePrivate, so the puzzle was
why the read-only cached page would later become page_has_private().

The C repro showed that it uses (a BTRFS_IOC_ADD_DEV ioctl which might
not be relevant and) a BLKRRPART ioctl 0x125f: I didn't follow BLKRRPART
all the way down, but imagine it has to attach buffer-heads to re-read
the partition table.  Which would explain it.

Aside from that particular ioctl, it seems a good idea to insist on
S_ISREG just to shrink the attack surface: as Yang Shi says, executable
THP on block device was never an intended usecase, and not a usecase
anyone is likely to miss! And that fuzzer appears to delight in
tormenting /dev/nullb0, so let's just seal off that avenue.

You're right to have some doubt, as to whether there might be other
ways for buffer-heads to get attached, even on a read-only regular
file; but no way has sprung to my mind, and READ_ONLY_THP_FOR_FS has
survived well in its intended usage: so I think we should proceed on
the assumption that no further bugs remain - then fix them when found.

I wasn't able to reproduce the problem with the repro, would need to
waste many hours to do so.  But here's the untested S_ISREG patch I
came up with.  Sorry, I've mixed something else in: in moving the
alignment part to clarify the conditions, I was alarmed to see that
shmem with !shmem_huge_enabled was falling through to THP_FOR_FS to
give unexpected huge pages: fixed that, though later found there's
a separate shmem_huge_enabled() check which should exclude it.

--- 5.15-rc4/mm/khugepaged.c	2021-09-12 17:39:21.943438422 -0700
+++ linux/khugepaged.c	2021-10-03 20:41:13.194822795 -0700
@@ -445,22 +445,25 @@ static bool hugepage_vma_check(struct vm
 	if (!transhuge_vma_enabled(vma, vm_flags))
 		return false;
 
+	if (vma->vm_file && !IS_ALIGNED((vma->vm_start >> PAGE_SHIFT) -
+					vma->vm_pgoff, HPAGE_PMD_NR))
+		return false;
+
 	/* Enabled via shmem mount options or sysfs settings. */
-	if (shmem_file(vma->vm_file) && shmem_huge_enabled(vma)) {
-		return IS_ALIGNED((vma->vm_start >> PAGE_SHIFT) - vma->vm_pgoff,
-				HPAGE_PMD_NR);
-	}
+	if (shmem_file(vma->vm_file))
+		return shmem_huge_enabled(vma);
 
 	/* THP settings require madvise. */
 	if (!(vm_flags & VM_HUGEPAGE) && !khugepaged_always())
 		return false;
 
 	/* Read-only file mappings need to be aligned for THP to work. */
-	if (IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS) && vma->vm_file &&
-	    !inode_is_open_for_write(vma->vm_file->f_inode) &&
-	    (vm_flags & VM_EXEC)) {
-		return IS_ALIGNED((vma->vm_start >> PAGE_SHIFT) - vma->vm_pgoff,
-				HPAGE_PMD_NR);
+	if (IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS) &&
+	    (vm_flags & VM_EXEC) && vma->vm_file) {
+		struct inode *inode = vma->vm_file->f_inode;
+
+	        return !inode_is_open_for_write(inode) &&
+			S_ISREG(inode->i_mode);
 	}
 
 	if (!vma->anon_vma || vma->vm_ops)

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-10-04 17:26                             ` Rongwei Wang
  2021-10-04 19:05                               ` Matthew Wilcox
  2021-10-04 20:26                               ` Song Liu
@ 2021-10-05  2:58                               ` Hugh Dickins
  2021-10-05  3:07                                 ` Matthew Wilcox
  2021-10-05  9:03                                 ` Rongwei Wang
  2 siblings, 2 replies; 61+ messages in thread
From: Hugh Dickins @ 2021-10-05  2:58 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: Song Liu, Matthew Wilcox, Hugh Dickins, Andrew Morton, Linux MM,
	Linux Kernel Mailing List, William Kucharski

On Tue, 5 Oct 2021, Rongwei Wang wrote:

> Hi,
> I have run our cases these two days to stress test new Patch #1. The new Patch
> #1 mainly add filemap_invalidate_{un}lock before and after
> truncate_pagecache(), basing on original Patch #1. And the crash has not
> happened.
> 
> Now, I keep the original Patch #1, then adding the code below which suggested
> by liu song (I'm not sure which one I should add in the next version,
> Suggested-by or Signed-off-by? If you know, please remind me).
> 
> -               if (filemap_nr_thps(inode->i_mapping))
> +               if (filemap_nr_thps(inode->i_mapping)) {
> +                       filemap_invalidate_lock(inode->i_mapping);
>                         truncate_pagecache(inode, 0);
> +                       filemap_invalidate_unlock(inode->i_mapping);
> +               }

I won't NAK that patch; but I still believe it's unnecessary, and don't
see how it protects against all the races (collapse_file() does not use
that lock, whereas collapse_file() does use page lock).  And if you're
hoping to fix 5.10, then you will have to backport those invalidate_lock
patches there too (they're really intended to protect hole-punching).

> 
> And the reason for keeping the original Patch #1 is mainly to fix the race
> between collapse_file and truncate_pagecache. It seems necessary. Despite the
> two-day test, I did not reproduce this race any more.
> 
> In addition, I also test the below method:
> 
> diff --git a/mm/truncate.c b/mm/truncate.c
> index 3f47190f98a8..33604e4ce60a 100644
> --- a/mm/truncate.c
> +++ b/mm/truncate.c
> @@ -210,8 +210,6 @@ invalidate_complete_page(struct address_space *mapping,
> struct page *page)
> 
>  int truncate_inode_page(struct address_space *mapping, struct page *page)
>  {
> -       VM_BUG_ON_PAGE(PageTail(page), page);
> -
>         if (page->mapping != mapping)
>                 return -EIO;
> 
> I am not very sure this VM_BUG_ON_PAGE(PageTail) is what Hugh means. And
> the test results show that only removing this VM_BUG_ON_PAGE(PageTail) has no
> effect. So, I still keep the original Patch #1 to fix one race.

Yes, that's exactly what I meant, and thank you for intending to try it.

But if that patch had "no effect", then I think you were not running the
kernel with that patch applied: because it deletes the BUG on line 213
of mm/truncate.c, which is what you reported in the first mail!

Or, is line 213 of mm/truncate.c in your 5.10.46-hugetext+ kernel
something else?  I've been looking at 5.15-rc.

But I wasn't proposing to delete it merely to hide the BUG: as I hope
I explained, we could move it below the page->mapping check, but it
wouldn't really be of any value there since tails have NULL page->mapping
anyway (well, I didn't check first and second tails, maybe mapping gets
reused for some compound page field in those). I was proposing to delete
it because the page->mapping check then weeds out the racy case once
we're holding page lock, without the need for adding anything special.

Hugh

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-10-05  2:58                               ` Hugh Dickins
@ 2021-10-05  3:07                                 ` Matthew Wilcox
  2021-10-05  9:03                                 ` Rongwei Wang
  1 sibling, 0 replies; 61+ messages in thread
From: Matthew Wilcox @ 2021-10-05  3:07 UTC (permalink / raw)
  To: Hugh Dickins
  Cc: Rongwei Wang, Song Liu, Andrew Morton, Linux MM,
	Linux Kernel Mailing List, William Kucharski

On Mon, Oct 04, 2021 at 07:58:10PM -0700, Hugh Dickins wrote:
> On Tue, 5 Oct 2021, Rongwei Wang wrote:
> 
> > Hi,
> > I have run our cases these two days to stress test new Patch #1. The new Patch
> > #1 mainly add filemap_invalidate_{un}lock before and after
> > truncate_pagecache(), basing on original Patch #1. And the crash has not
> > happened.
> > 
> > Now, I keep the original Patch #1, then adding the code below which suggested
> > by liu song (I'm not sure which one I should add in the next version,
> > Suggested-by or Signed-off-by? If you know, please remind me).
> > 
> > -               if (filemap_nr_thps(inode->i_mapping))
> > +               if (filemap_nr_thps(inode->i_mapping)) {
> > +                       filemap_invalidate_lock(inode->i_mapping);
> >                         truncate_pagecache(inode, 0);
> > +                       filemap_invalidate_unlock(inode->i_mapping);
> > +               }
> 
> I won't NAK that patch; but I still believe it's unnecessary, and don't
> see how it protects against all the races (collapse_file() does not use
> that lock, whereas collapse_file() does use page lock).  And if you're
> hoping to fix 5.10, then you will have to backport those invalidate_lock
> patches there too (they're really intended to protect hole-punching).

I believe all we really need to do is protect against calling
truncate_pagecache() simultaneously to avoid one of the calls seeing
a tail page.  i_mutex would work for this purpose just as well as
filemap_invalidate_lock().  See, for example, ext4_zero_range() which
first takes inode_lock(), then filemap_invalidate_lock() before calling
truncate_pagecache_range().

> > And the reason for keeping the original Patch #1 is mainly to fix the race
> > between collapse_file and truncate_pagecache. It seems necessary. Despite the
> > two-day test, I did not reproduce this race any more.
> > 
> > In addition, I also test the below method:
> > 
> > diff --git a/mm/truncate.c b/mm/truncate.c
> > index 3f47190f98a8..33604e4ce60a 100644
> > --- a/mm/truncate.c
> > +++ b/mm/truncate.c
> > @@ -210,8 +210,6 @@ invalidate_complete_page(struct address_space *mapping,
> > struct page *page)
> > 
> >  int truncate_inode_page(struct address_space *mapping, struct page *page)
> >  {
> > -       VM_BUG_ON_PAGE(PageTail(page), page);
> > -
> >         if (page->mapping != mapping)
> >                 return -EIO;
> > 
> > I am not very sure this VM_BUG_ON_PAGE(PageTail) is what Hugh means. And
> > the test results show that only removing this VM_BUG_ON_PAGE(PageTail) has no
> > effect. So, I still keep the original Patch #1 to fix one race.
> 
> Yes, that's exactly what I meant, and thank you for intending to try it.
> 
> But if that patch had "no effect", then I think you were not running the
> kernel with that patch applied: because it deletes the BUG on line 213
> of mm/truncate.c, which is what you reported in the first mail!
> 
> Or, is line 213 of mm/truncate.c in your 5.10.46-hugetext+ kernel
> something else?  I've been looking at 5.15-rc.
> 
> But I wasn't proposing to delete it merely to hide the BUG: as I hope
> I explained, we could move it below the page->mapping check, but it
> wouldn't really be of any value there since tails have NULL page->mapping
> anyway (well, I didn't check first and second tails, maybe mapping gets
> reused for some compound page field in those). I was proposing to delete
> it because the page->mapping check then weeds out the racy case once
> we're holding page lock, without the need for adding anything special.

I think if we remove the race with the above mutex lock then we'll never
see a tail page in this routine.

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache
  2021-10-05  2:58                               ` Hugh Dickins
  2021-10-05  3:07                                 ` Matthew Wilcox
@ 2021-10-05  9:03                                 ` Rongwei Wang
  1 sibling, 0 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-10-05  9:03 UTC (permalink / raw)
  To: Hugh Dickins, Matthew Wilcox
  Cc: Song Liu, Andrew Morton, Linux MM, Linux Kernel Mailing List,
	William Kucharski



On 10/5/21 10:58 AM, Hugh Dickins wrote:
> On Tue, 5 Oct 2021, Rongwei Wang wrote:
> 
>> Hi,
>> I have run our cases these two days to stress test new Patch #1. The new Patch
>> #1 mainly add filemap_invalidate_{un}lock before and after
>> truncate_pagecache(), basing on original Patch #1. And the crash has not
>> happened.
>>
>> Now, I keep the original Patch #1, then adding the code below which suggested
>> by liu song (I'm not sure which one I should add in the next version,
>> Suggested-by or Signed-off-by? If you know, please remind me).
>>
>> -               if (filemap_nr_thps(inode->i_mapping))
>> +               if (filemap_nr_thps(inode->i_mapping)) {
>> +                       filemap_invalidate_lock(inode->i_mapping);
>>                          truncate_pagecache(inode, 0);
>> +                       filemap_invalidate_unlock(inode->i_mapping);
>> +               }
> 
> I won't NAK that patch; but I still believe it's unnecessary, and don't
> see how it protects against all the races (collapse_file() does not use
> that lock, whereas collapse_file() does use page lock).  And if you're
> hoping to fix 5.10, then you will have to backport those invalidate_lock
> patches there too (they're really intended to protect hole-punching).
> 
>>
>> And the reason for keeping the original Patch #1 is mainly to fix the race
>> between collapse_file and truncate_pagecache. It seems necessary. Despite the
>> two-day test, I did not reproduce this race any more.
>>
>> In addition, I also test the below method:
>>
>> diff --git a/mm/truncate.c b/mm/truncate.c
>> index 3f47190f98a8..33604e4ce60a 100644
>> --- a/mm/truncate.c
>> +++ b/mm/truncate.c
>> @@ -210,8 +210,6 @@ invalidate_complete_page(struct address_space *mapping,
>> struct page *page)
>>
>>   int truncate_inode_page(struct address_space *mapping, struct page *page)
>>   {
>> -       VM_BUG_ON_PAGE(PageTail(page), page);
>> -
>>          if (page->mapping != mapping)
>>                  return -EIO;
>>
>> I am not very sure this VM_BUG_ON_PAGE(PageTail) is what Hugh means. And
>> the test results show that only removing this VM_BUG_ON_PAGE(PageTail) has no
>> effect. So, I still keep the original Patch #1 to fix one race.
> 
> Yes, that's exactly what I meant, and thank you for intending to try it.
> 
> But if that patch had "no effect", then I think you were not running the
> kernel with that patch applied: because it deletes the BUG on line 213
> of mm/truncate.c, which is what you reported in the first mail!
> 
> Or, is line 213 of mm/truncate.c in your 5.10.46-hugetext+ kernel
> something else?  I've been looking at 5.15-rc.
Hi, Hugh

I'm sorry the confusing '5.10.46-hugetext+'. I am also look and test at 
5.15-rc.
> 
> But I wasn't proposing to delete it merely to hide the BUG: as I hope
> I explained, we could move it below the page->mapping check, but it
> wouldn't really be of any value there since tails have NULL page->mapping
> anyway (well, I didn't check first and second tails, maybe mapping gets
> reused for some compound page field in those). I was proposing to delete
> it because the page->mapping check then weeds out the racy case once
> we're holding page lock, without the need for adding anything special.
> 
> Hugh
Today, I try again to create some cases to reproduce the race, such as 
ensuring that multiple processes are always executing 
‘truncate_pagecache’ and only mapping 2M DSO. In this way, I try to 
ensure that the target of 'collapse_file' and 'truncate_pagecache' can 
only be the same VMA, to increase the probability of reproducing that 
race. But, I can't reproduce that race any more.

In fact, according to the previous experience, the current number of 
attempts should be able to reproduce that race.

If you have the idea about creating this case, please tell me, and I can 
try again. Or we can solve it when it appears again.

Thanks!
> 

^ permalink raw reply	[flat|nested] 61+ messages in thread

* [PATCH v3 v3 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache
  2021-09-06 12:11 [PATCH 0/2] mm, thp: fix file-backed THP race in collapse_file Rongwei Wang
                   ` (4 preceding siblings ...)
  2021-09-22  7:06 ` [PATCH v2 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
@ 2021-10-06  2:18 ` Rongwei Wang
  2021-10-06  2:18   ` [PATCH v3 v3 1/2] mm, thp: lock filemap when truncating page cache Rongwei Wang
  2021-10-06  2:18   ` [PATCH v3 v3 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
  2021-10-11  2:22 ` [PATCH v4 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache Rongwei Wang
  6 siblings, 2 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-10-06  2:18 UTC (permalink / raw)
  To: linux-mm, linux-kernel; +Cc: akpm, willy, song, william.kucharski, hughd

Hi,
We found two bugs related to file-backed THP in our cases, recently.
The two bugs rough description as following:

1. in truncate_inode_pages_range, subpage(s) of file-backed THP can be
revealed by find_get_entry.

2. 'collapse_file' miss the pages which in writeback but no private.
This situation will be triggered in XFS when block size is set to
PAGESIZE.

These two patches mainly fix the above mentioned bugs, and have been
tested in latest branch.

Changelog:

v2 -> v3:
- Patch "mm, thp: lock filemap when truncating page cache"
add filemap_invalidate_{un}lock before and after calling truncate_pagecache (Suggested by Song Liu and Matthew).

v1 -> v2:
- Patch "mm, thp: check page mapping when truncating page cache"
move the check of page mapping to behind lock_page.
- Patch "mm, thp: bail out early in collapse_file for writeback page"
check the writeback flag before taking page lock (Suggested by Yang Shi).

v1 link:
https://patchwork.kernel.org/project/linux-mm/cover/20210906121200.57905-1-rongwei.wang@linux.alibaba.com/
v2 link:
https://patchwork.kernel.org/project/linux-mm/patch/20210922070645.47345-2-rongwei.wang@linux.alibaba.com/

Rongwei Wang (2):
  mm, thp: lock filemap when truncating page cache
  mm, thp: bail out early in collapse_file for writeback page

 fs/open.c       | 5 ++++-
 mm/khugepaged.c | 7 ++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

-- 
2.27.0


^ permalink raw reply	[flat|nested] 61+ messages in thread

* [PATCH v3 v3 1/2] mm, thp: lock filemap when truncating page cache
  2021-10-06  2:18 ` [PATCH v3 v3 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache Rongwei Wang
@ 2021-10-06  2:18   ` Rongwei Wang
  2021-10-06  2:18   ` [PATCH v3 v3 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
  1 sibling, 0 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-10-06  2:18 UTC (permalink / raw)
  To: linux-mm, linux-kernel; +Cc: akpm, willy, song, william.kucharski, hughd

Transparent huge page has supported read-only non-shmem files. The file-
backed THP is collapsed by khugepaged and truncated when written (for
shared libraries).

However, there is a race when multiple writers truncate the same page
cache concurrently.

In that case, subpage(s) of file THP can be revealed by find_get_entry
in truncate_inode_pages_range, which will trigger PageTail BUG_ON in
truncate_inode_page, as follows.

[40326.247034] page:000000009e420ff2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x7ff pfn:0x50c3ff
[40326.247041] head:0000000075ff816d order:9 compound_mapcount:0 compound_pincount:0
[40326.247046] flags: 0x37fffe0000010815(locked|uptodate|lru|arch_1|head)
[40326.247051] raw: 37fffe0000000000 fffffe0013108001 dead000000000122 dead000000000400
[40326.247053] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
[40326.247055] head: 37fffe0000010815 fffffe001066bd48 ffff000404183c20 0000000000000000
[40326.247057] head: 0000000000000600 0000000000000000 00000001ffffffff ffff000c0345a000
[40326.247058] page dumped because: VM_BUG_ON_PAGE(PageTail(page))
[40326.247077] ------------[ cut here ]------------
[40326.247080] kernel BUG at mm/truncate.c:213!
[40326.280581] Internal error: Oops - BUG: 0 [#1] SMP
[40326.281077] Modules linked in: xfs(E) libcrc32c(E) rfkill(E) ...
[40326.285130] CPU: 14 PID: 11394 Comm: check_madvise_d Kdump: ...
[40326.286202] Hardware name: ECS, BIOS 0.0.0 02/06/2015
[40326.286968] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
[40326.287584] pc : truncate_inode_page+0x64/0x70
[40326.288040] lr : truncate_inode_page+0x64/0x70
[40326.288498] sp : ffff80001b60b900
[40326.288837] x29: ffff80001b60b900 x28: 00000000000007ff
[40326.289377] x27: ffff80001b60b9a0 x26: 0000000000000000
[40326.289943] x25: 000000000000000f x24: ffff80001b60b9a0
[40326.290485] x23: ffff80001b60ba18 x22: ffff0001e0999ea8
[40326.291027] x21: ffff0000c21db300 x20: ffffffffffffffff
[40326.291566] x19: fffffe001310ffc0 x18: 0000000000000020
[40326.292106] x17: 0000000000000000 x16: 0000000000000000
[40326.292655] x15: ffff0000c21db960 x14: 3030306666666620
[40326.293197] x13: 6666666666666666 x12: 3130303030303030
[40326.293746] x11: ffff8000117b69b8 x10: 00000000ffff8000
[40326.294313] x9 : ffff80001012690c x8 : 0000000000000000
[40326.294851] x7 : ffff8000114f69b8 x6 : 0000000000017ffd
[40326.295392] x5 : ffff0007fffbcbc8 x4 : ffff80001b60b5c0
[40326.295942] x3 : 0000000000000001 x2 : 0000000000000000
[40326.296497] x1 : 0000000000000000 x0 : 0000000000000000
[40326.297047] Call trace:
[40326.297304]  truncate_inode_page+0x64/0x70
[40326.297724]  truncate_inode_pages_range+0x550/0x7e4
[40326.298251]  truncate_pagecache+0x58/0x80
[40326.298662]  do_dentry_open+0x1e4/0x3c0
[40326.299052]  vfs_open+0x38/0x44
[40326.299377]  do_open+0x1f0/0x310
[40326.299709]  path_openat+0x114/0x1dc
[40326.300077]  do_filp_open+0x84/0x134
[40326.300444]  do_sys_openat2+0xbc/0x164
[40326.300825]  __arm64_sys_openat+0x74/0xc0
[40326.301236]  el0_svc_common.constprop.0+0x88/0x220
[40326.301723]  do_el0_svc+0x30/0xa0
[40326.302089]  el0_svc+0x20/0x30
[40326.302404]  el0_sync_handler+0x1a4/0x1b0
[40326.302814]  el0_sync+0x180/0x1c0
[40326.303157] Code: aa0103e0 900061e1 910ec021 9400d300 (d4210000)
[40326.303775] ---[ end trace f70cdb42cb7c2d42 ]---
[40326.304244] Kernel panic - not syncing: Oops - BUG: Fatal exception

This patch mainly to lock filemap when one enter truncate_pagecache(),
avoiding truncating the same page cache concurrently.

Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
Suggested-by: Matthew Wilcox <willy@infradead.org>
Tested-by: Song Liu <song@kernel.org>
Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
---
 fs/open.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/open.c b/fs/open.c
index daa324606a41..9ec3cfca3b1a 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -856,8 +856,11 @@ static int do_dentry_open(struct file *f,
 		 * of THPs into the page cache will fail.
 		 */
 		smp_mb();
-		if (filemap_nr_thps(inode->i_mapping))
+		if (filemap_nr_thps(inode->i_mapping)) {
+			filemap_invalidate_lock(inode->i_mapping);
 			truncate_pagecache(inode, 0);
+			filemap_invalidate_unlock(inode->i_mapping);
+		}
 	}
 
 	return 0;
-- 
2.27.0


^ permalink raw reply	[flat|nested] 61+ messages in thread

* [PATCH v3 v3 2/2] mm, thp: bail out early in collapse_file for writeback page
  2021-10-06  2:18 ` [PATCH v3 v3 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache Rongwei Wang
  2021-10-06  2:18   ` [PATCH v3 v3 1/2] mm, thp: lock filemap when truncating page cache Rongwei Wang
@ 2021-10-06  2:18   ` Rongwei Wang
  2021-10-06  2:41     ` Matthew Wilcox
  2021-10-06 17:58     ` Yang Shi
  1 sibling, 2 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-10-06  2:18 UTC (permalink / raw)
  To: linux-mm, linux-kernel; +Cc: akpm, willy, song, william.kucharski, hughd

Currently collapse_file does not explicitly check PG_writeback, instead,
page_has_private and try_to_release_page are used to filter writeback
pages. This does not work for xfs with blocksize equal to or larger
than pagesize, because in such case xfs has no page->private.

This makes collapse_file bail out early for writeback page. Otherwise,
xfs end_page_writeback will panic as follows.

[ 6411.448211] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:ffff0003f88c86a8 index:0x0 pfn:0x84ef32
[ 6411.448304] aops:xfs_address_space_operations [xfs] ino:30000b7 dentry name:"libtest.so"
[ 6411.448312] flags: 0x57fffe0000008027(locked|referenced|uptodate|active|writeback)
[ 6411.448317] raw: 57fffe0000008027 ffff80001b48bc28 ffff80001b48bc28 ffff0003f88c86a8
[ 6411.448321] raw: 0000000000000000 0000000000000000 00000000ffffffff ffff0000c3e9a000
[ 6411.448324] page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u <= 127u))
[ 6411.448327] page->mem_cgroup:ffff0000c3e9a000
[ 6411.448340] ------------[ cut here ]------------
[ 6411.448343] kernel BUG at include/linux/mm.h:1212!
[ 6411.449288] Internal error: Oops - BUG: 0 [#1] SMP
[ 6411.449786] Modules linked in:
[ 6411.449790] BUG: Bad page state in process khugepaged  pfn:84ef32
[ 6411.450143]  xfs(E)
[ 6411.450459] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:0 index:0x0 pfn:0x84ef32
[ 6411.451361]  libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) ...
[ 6411.451387] CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Tainted: ...
[ 6411.451389] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
[ 6411.451393] pc : end_page_writeback+0x1c0/0x214
[ 6411.451394] lr : end_page_writeback+0x1c0/0x214
[ 6411.451395] sp : ffff800011ce3cc0
[ 6411.451396] x29: ffff800011ce3cc0 x28: 0000000000000000
[ 6411.451398] x27: ffff000c04608040 x26: 0000000000000000
[ 6411.451399] x25: ffff000c04608040 x24: 0000000000001000
[ 6411.451401] x23: ffff0003f88c8530 x22: 0000000000001000
[ 6411.451403] x21: ffff0003f88c8530 x20: 0000000000000000
[ 6411.451404] x19: fffffe00201bcc80 x18: 0000000000000030
[ 6411.451406] x17: 0000000000000000 x16: 0000000000000000
[ 6411.451407] x15: ffff000c018f9760 x14: ffffffffffffffff
[ 6411.451409] x13: ffff8000119d72b0 x12: ffff8000119d6ee3
[ 6411.451410] x11: ffff8000117b69b8 x10: 00000000ffff8000
[ 6411.451412] x9 : ffff800010617534 x8 : 0000000000000000
[ 6411.451413] x7 : ffff8000114f69b8 x6 : 000000000000000f
[ 6411.451415] x5 : 0000000000000000 x4 : 0000000000000000
[ 6411.451416] x3 : 0000000000000400 x2 : 0000000000000000
[ 6411.451418] x1 : 0000000000000000 x0 : 0000000000000000
[ 6411.451420] Call trace:
[ 6411.451421]  end_page_writeback+0x1c0/0x214
[ 6411.451424]  iomap_finish_page_writeback+0x13c/0x204
[ 6411.451425]  iomap_finish_ioend+0xe8/0x19c
[ 6411.451426]  iomap_writepage_end_bio+0x38/0x50
[ 6411.451427]  bio_endio+0x168/0x1ec
[ 6411.451430]  blk_update_request+0x278/0x3f0
[ 6411.451432]  blk_mq_end_request+0x34/0x15c
[ 6411.451435]  virtblk_request_done+0x38/0x74 [virtio_blk]
[ 6411.451437]  blk_done_softirq+0xc4/0x110
[ 6411.451439]  __do_softirq+0x128/0x38c
[ 6411.451441]  __irq_exit_rcu+0x118/0x150
[ 6411.451442]  irq_exit+0x1c/0x30
[ 6411.451445]  __handle_domain_irq+0x8c/0xf0
[ 6411.451446]  gic_handle_irq+0x84/0x108
[ 6411.451447]  el1_irq+0xcc/0x180
[ 6411.451448]  arch_cpu_idle+0x18/0x40
[ 6411.451450]  default_idle_call+0x4c/0x1a0
[ 6411.451453]  cpuidle_idle_call+0x168/0x1e0
[ 6411.451454]  do_idle+0xb4/0x104
[ 6411.451455]  cpu_startup_entry+0x30/0x9c
[ 6411.451458]  secondary_start_kernel+0x104/0x180
[ 6411.451460] Code: d4210000 b0006161 910c8021 94013f4d (d4210000)
[ 6411.451462] ---[ end trace 4a88c6a074082f8c ]---
[ 6411.451464] Kernel panic - not syncing: Oops - BUG: Fatal exception in interrupt

Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
Suggested-by: Yang Shi <shy828301@gmail.com>
Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
---
 mm/khugepaged.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 045cc579f724..48de4e1b0783 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -1763,6 +1763,10 @@ static void collapse_file(struct mm_struct *mm,
 				filemap_flush(mapping);
 				result = SCAN_FAIL;
 				goto xa_unlocked;
+			} else if (PageWriteback(page)) {
+				xas_unlock_irq(&xas);
+				result = SCAN_FAIL;
+				goto xa_unlocked;
 			} else if (trylock_page(page)) {
 				get_page(page);
 				xas_unlock_irq(&xas);
@@ -1798,7 +1802,8 @@ static void collapse_file(struct mm_struct *mm,
 			goto out_unlock;
 		}
 
-		if (!is_shmem && PageDirty(page)) {
+		if (!is_shmem && (PageDirty(page) ||
+				  PageWriteback(page))) {
 			/*
 			 * khugepaged only works on read-only fd, so this
 			 * page is dirty because it hasn't been flushed
-- 
2.27.0


^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v3 v3 2/2] mm, thp: bail out early in collapse_file for writeback page
  2021-10-06  2:18   ` [PATCH v3 v3 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
@ 2021-10-06  2:41     ` Matthew Wilcox
  2021-10-06  8:39       ` Rongwei Wang
  2021-10-06 17:58     ` Yang Shi
  1 sibling, 1 reply; 61+ messages in thread
From: Matthew Wilcox @ 2021-10-06  2:41 UTC (permalink / raw)
  To: Rongwei Wang; +Cc: linux-mm, linux-kernel, akpm, song, william.kucharski, hughd

On Wed, Oct 06, 2021 at 10:18:37AM +0800, Rongwei Wang wrote:
> Currently collapse_file does not explicitly check PG_writeback, instead,
> page_has_private and try_to_release_page are used to filter writeback
> pages. This does not work for xfs with blocksize equal to or larger
> than pagesize, because in such case xfs has no page->private.
> 
> This makes collapse_file bail out early for writeback page. Otherwise,
> xfs end_page_writeback will panic as follows.

Could you cut the timestamps out?  They don't add any value.

> [ 6411.448211] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:ffff0003f88c86a8 index:0x0 pfn:0x84ef32
> [ 6411.448304] aops:xfs_address_space_operations [xfs] ino:30000b7 dentry name:"libtest.so"
> [ 6411.448312] flags: 0x57fffe0000008027(locked|referenced|uptodate|active|writeback)
> [ 6411.448317] raw: 57fffe0000008027 ffff80001b48bc28 ffff80001b48bc28 ffff0003f88c86a8
> [ 6411.448321] raw: 0000000000000000 0000000000000000 00000000ffffffff ffff0000c3e9a000
> [ 6411.448324] page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u <= 127u))
> [ 6411.448327] page->mem_cgroup:ffff0000c3e9a000
> [ 6411.448340] ------------[ cut here ]------------
> [ 6411.448343] kernel BUG at include/linux/mm.h:1212!
> [ 6411.449288] Internal error: Oops - BUG: 0 [#1] SMP
> [ 6411.449786] Modules linked in:
> [ 6411.449790] BUG: Bad page state in process khugepaged  pfn:84ef32
> [ 6411.450143]  xfs(E)
> [ 6411.450459] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:0 index:0x0 pfn:0x84ef32
> [ 6411.451361]  libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) ...
> [ 6411.451387] CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Tainted: ...
> [ 6411.451389] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
> [ 6411.451393] pc : end_page_writeback+0x1c0/0x214
> [ 6411.451394] lr : end_page_writeback+0x1c0/0x214
> [ 6411.451395] sp : ffff800011ce3cc0
> [ 6411.451396] x29: ffff800011ce3cc0 x28: 0000000000000000
> [ 6411.451398] x27: ffff000c04608040 x26: 0000000000000000
> [ 6411.451399] x25: ffff000c04608040 x24: 0000000000001000
> [ 6411.451401] x23: ffff0003f88c8530 x22: 0000000000001000
> [ 6411.451403] x21: ffff0003f88c8530 x20: 0000000000000000
> [ 6411.451404] x19: fffffe00201bcc80 x18: 0000000000000030
> [ 6411.451406] x17: 0000000000000000 x16: 0000000000000000
> [ 6411.451407] x15: ffff000c018f9760 x14: ffffffffffffffff
> [ 6411.451409] x13: ffff8000119d72b0 x12: ffff8000119d6ee3
> [ 6411.451410] x11: ffff8000117b69b8 x10: 00000000ffff8000
> [ 6411.451412] x9 : ffff800010617534 x8 : 0000000000000000
> [ 6411.451413] x7 : ffff8000114f69b8 x6 : 000000000000000f
> [ 6411.451415] x5 : 0000000000000000 x4 : 0000000000000000
> [ 6411.451416] x3 : 0000000000000400 x2 : 0000000000000000
> [ 6411.451418] x1 : 0000000000000000 x0 : 0000000000000000
> [ 6411.451420] Call trace:
> [ 6411.451421]  end_page_writeback+0x1c0/0x214
> [ 6411.451424]  iomap_finish_page_writeback+0x13c/0x204
> [ 6411.451425]  iomap_finish_ioend+0xe8/0x19c
> [ 6411.451426]  iomap_writepage_end_bio+0x38/0x50
> [ 6411.451427]  bio_endio+0x168/0x1ec
> [ 6411.451430]  blk_update_request+0x278/0x3f0
> [ 6411.451432]  blk_mq_end_request+0x34/0x15c
> [ 6411.451435]  virtblk_request_done+0x38/0x74 [virtio_blk]
> [ 6411.451437]  blk_done_softirq+0xc4/0x110
> [ 6411.451439]  __do_softirq+0x128/0x38c
> [ 6411.451441]  __irq_exit_rcu+0x118/0x150
> [ 6411.451442]  irq_exit+0x1c/0x30
> [ 6411.451445]  __handle_domain_irq+0x8c/0xf0
> [ 6411.451446]  gic_handle_irq+0x84/0x108
> [ 6411.451447]  el1_irq+0xcc/0x180
> [ 6411.451448]  arch_cpu_idle+0x18/0x40
> [ 6411.451450]  default_idle_call+0x4c/0x1a0
> [ 6411.451453]  cpuidle_idle_call+0x168/0x1e0
> [ 6411.451454]  do_idle+0xb4/0x104
> [ 6411.451455]  cpu_startup_entry+0x30/0x9c
> [ 6411.451458]  secondary_start_kernel+0x104/0x180
> [ 6411.451460] Code: d4210000 b0006161 910c8021 94013f4d (d4210000)
> [ 6411.451462] ---[ end trace 4a88c6a074082f8c ]---
> [ 6411.451464] Kernel panic - not syncing: Oops - BUG: Fatal exception in interrupt
> 
> Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
> Suggested-by: Yang Shi <shy828301@gmail.com>
> Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
> Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>

Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>

Although I think the Fixes: line is wrong.  This bug goes all the
way back to 99cb0dbd47a1.


^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v3 v3 2/2] mm, thp: bail out early in collapse_file for writeback page
  2021-10-06  2:41     ` Matthew Wilcox
@ 2021-10-06  8:39       ` Rongwei Wang
  0 siblings, 0 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-10-06  8:39 UTC (permalink / raw)
  To: Matthew Wilcox
  Cc: linux-mm, linux-kernel, akpm, song, william.kucharski, hughd



On 10/6/21 10:41 AM, Matthew Wilcox wrote:
> On Wed, Oct 06, 2021 at 10:18:37AM +0800, Rongwei Wang wrote:
>> Currently collapse_file does not explicitly check PG_writeback, instead,
>> page_has_private and try_to_release_page are used to filter writeback
>> pages. This does not work for xfs with blocksize equal to or larger
>> than pagesize, because in such case xfs has no page->private.
>>
>> This makes collapse_file bail out early for writeback page. Otherwise,
>> xfs end_page_writeback will panic as follows.
> 
> Could you cut the timestamps out?  They don't add any value.
OK, no problem!
> 
>> [ 6411.448211] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:ffff0003f88c86a8 index:0x0 pfn:0x84ef32
>> [ 6411.448304] aops:xfs_address_space_operations [xfs] ino:30000b7 dentry name:"libtest.so"
>> [ 6411.448312] flags: 0x57fffe0000008027(locked|referenced|uptodate|active|writeback)
>> [ 6411.448317] raw: 57fffe0000008027 ffff80001b48bc28 ffff80001b48bc28 ffff0003f88c86a8
>> [ 6411.448321] raw: 0000000000000000 0000000000000000 00000000ffffffff ffff0000c3e9a000
>> [ 6411.448324] page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u <= 127u))
>> [ 6411.448327] page->mem_cgroup:ffff0000c3e9a000
>> [ 6411.448340] ------------[ cut here ]------------
>> [ 6411.448343] kernel BUG at include/linux/mm.h:1212!
>> [ 6411.449288] Internal error: Oops - BUG: 0 [#1] SMP
>> [ 6411.449786] Modules linked in:
>> [ 6411.449790] BUG: Bad page state in process khugepaged  pfn:84ef32
>> [ 6411.450143]  xfs(E)
>> [ 6411.450459] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:0 index:0x0 pfn:0x84ef32
>> [ 6411.451361]  libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) ...
>> [ 6411.451387] CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Tainted: ...
>> [ 6411.451389] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
>> [ 6411.451393] pc : end_page_writeback+0x1c0/0x214
>> [ 6411.451394] lr : end_page_writeback+0x1c0/0x214
>> [ 6411.451395] sp : ffff800011ce3cc0
>> [ 6411.451396] x29: ffff800011ce3cc0 x28: 0000000000000000
>> [ 6411.451398] x27: ffff000c04608040 x26: 0000000000000000
>> [ 6411.451399] x25: ffff000c04608040 x24: 0000000000001000
>> [ 6411.451401] x23: ffff0003f88c8530 x22: 0000000000001000
>> [ 6411.451403] x21: ffff0003f88c8530 x20: 0000000000000000
>> [ 6411.451404] x19: fffffe00201bcc80 x18: 0000000000000030
>> [ 6411.451406] x17: 0000000000000000 x16: 0000000000000000
>> [ 6411.451407] x15: ffff000c018f9760 x14: ffffffffffffffff
>> [ 6411.451409] x13: ffff8000119d72b0 x12: ffff8000119d6ee3
>> [ 6411.451410] x11: ffff8000117b69b8 x10: 00000000ffff8000
>> [ 6411.451412] x9 : ffff800010617534 x8 : 0000000000000000
>> [ 6411.451413] x7 : ffff8000114f69b8 x6 : 000000000000000f
>> [ 6411.451415] x5 : 0000000000000000 x4 : 0000000000000000
>> [ 6411.451416] x3 : 0000000000000400 x2 : 0000000000000000
>> [ 6411.451418] x1 : 0000000000000000 x0 : 0000000000000000
>> [ 6411.451420] Call trace:
>> [ 6411.451421]  end_page_writeback+0x1c0/0x214
>> [ 6411.451424]  iomap_finish_page_writeback+0x13c/0x204
>> [ 6411.451425]  iomap_finish_ioend+0xe8/0x19c
>> [ 6411.451426]  iomap_writepage_end_bio+0x38/0x50
>> [ 6411.451427]  bio_endio+0x168/0x1ec
>> [ 6411.451430]  blk_update_request+0x278/0x3f0
>> [ 6411.451432]  blk_mq_end_request+0x34/0x15c
>> [ 6411.451435]  virtblk_request_done+0x38/0x74 [virtio_blk]
>> [ 6411.451437]  blk_done_softirq+0xc4/0x110
>> [ 6411.451439]  __do_softirq+0x128/0x38c
>> [ 6411.451441]  __irq_exit_rcu+0x118/0x150
>> [ 6411.451442]  irq_exit+0x1c/0x30
>> [ 6411.451445]  __handle_domain_irq+0x8c/0xf0
>> [ 6411.451446]  gic_handle_irq+0x84/0x108
>> [ 6411.451447]  el1_irq+0xcc/0x180
>> [ 6411.451448]  arch_cpu_idle+0x18/0x40
>> [ 6411.451450]  default_idle_call+0x4c/0x1a0
>> [ 6411.451453]  cpuidle_idle_call+0x168/0x1e0
>> [ 6411.451454]  do_idle+0xb4/0x104
>> [ 6411.451455]  cpu_startup_entry+0x30/0x9c
>> [ 6411.451458]  secondary_start_kernel+0x104/0x180
>> [ 6411.451460] Code: d4210000 b0006161 910c8021 94013f4d (d4210000)
>> [ 6411.451462] ---[ end trace 4a88c6a074082f8c ]---
>> [ 6411.451464] Kernel panic - not syncing: Oops - BUG: Fatal exception in interrupt
>>
>> Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
>> Suggested-by: Yang Shi <shy828301@gmail.com>
>> Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
>> Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
> 
> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
> 
> Although I think the Fixes: line is wrong.  This bug goes all the
> way back to 99cb0dbd47a1.
In fact, I understand it this way: the 99cb0dbd47a1 only introduce 
file-backed THP for VMA with MAP_DENYWRITE, denying write directly not 
to truncate pagecache when it is opened. And eb6ecbed0aa2 will to 
truncate pagecache when DSO is opened by a writer, then will trigger ...

It seems 'Fixes: eb6ecbed0aa2' is more reasonable.
> 

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v3 v3 2/2] mm, thp: bail out early in collapse_file for writeback page
  2021-10-06  2:18   ` [PATCH v3 v3 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
  2021-10-06  2:41     ` Matthew Wilcox
@ 2021-10-06 17:58     ` Yang Shi
  1 sibling, 0 replies; 61+ messages in thread
From: Yang Shi @ 2021-10-06 17:58 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: Linux MM, Linux Kernel Mailing List, Andrew Morton,
	Matthew Wilcox, Song Liu, William Kucharski, Hugh Dickins

On Tue, Oct 5, 2021 at 7:18 PM Rongwei Wang
<rongwei.wang@linux.alibaba.com> wrote:
>
> Currently collapse_file does not explicitly check PG_writeback, instead,
> page_has_private and try_to_release_page are used to filter writeback
> pages. This does not work for xfs with blocksize equal to or larger
> than pagesize, because in such case xfs has no page->private.
>
> This makes collapse_file bail out early for writeback page. Otherwise,
> xfs end_page_writeback will panic as follows.
>
> [ 6411.448211] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:ffff0003f88c86a8 index:0x0 pfn:0x84ef32
> [ 6411.448304] aops:xfs_address_space_operations [xfs] ino:30000b7 dentry name:"libtest.so"
> [ 6411.448312] flags: 0x57fffe0000008027(locked|referenced|uptodate|active|writeback)
> [ 6411.448317] raw: 57fffe0000008027 ffff80001b48bc28 ffff80001b48bc28 ffff0003f88c86a8
> [ 6411.448321] raw: 0000000000000000 0000000000000000 00000000ffffffff ffff0000c3e9a000
> [ 6411.448324] page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u <= 127u))
> [ 6411.448327] page->mem_cgroup:ffff0000c3e9a000
> [ 6411.448340] ------------[ cut here ]------------
> [ 6411.448343] kernel BUG at include/linux/mm.h:1212!
> [ 6411.449288] Internal error: Oops - BUG: 0 [#1] SMP
> [ 6411.449786] Modules linked in:
> [ 6411.449790] BUG: Bad page state in process khugepaged  pfn:84ef32
> [ 6411.450143]  xfs(E)
> [ 6411.450459] page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:0 index:0x0 pfn:0x84ef32
> [ 6411.451361]  libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) ...
> [ 6411.451387] CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Tainted: ...
> [ 6411.451389] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
> [ 6411.451393] pc : end_page_writeback+0x1c0/0x214
> [ 6411.451394] lr : end_page_writeback+0x1c0/0x214
> [ 6411.451395] sp : ffff800011ce3cc0
> [ 6411.451396] x29: ffff800011ce3cc0 x28: 0000000000000000
> [ 6411.451398] x27: ffff000c04608040 x26: 0000000000000000
> [ 6411.451399] x25: ffff000c04608040 x24: 0000000000001000
> [ 6411.451401] x23: ffff0003f88c8530 x22: 0000000000001000
> [ 6411.451403] x21: ffff0003f88c8530 x20: 0000000000000000
> [ 6411.451404] x19: fffffe00201bcc80 x18: 0000000000000030
> [ 6411.451406] x17: 0000000000000000 x16: 0000000000000000
> [ 6411.451407] x15: ffff000c018f9760 x14: ffffffffffffffff
> [ 6411.451409] x13: ffff8000119d72b0 x12: ffff8000119d6ee3
> [ 6411.451410] x11: ffff8000117b69b8 x10: 00000000ffff8000
> [ 6411.451412] x9 : ffff800010617534 x8 : 0000000000000000
> [ 6411.451413] x7 : ffff8000114f69b8 x6 : 000000000000000f
> [ 6411.451415] x5 : 0000000000000000 x4 : 0000000000000000
> [ 6411.451416] x3 : 0000000000000400 x2 : 0000000000000000
> [ 6411.451418] x1 : 0000000000000000 x0 : 0000000000000000
> [ 6411.451420] Call trace:
> [ 6411.451421]  end_page_writeback+0x1c0/0x214
> [ 6411.451424]  iomap_finish_page_writeback+0x13c/0x204
> [ 6411.451425]  iomap_finish_ioend+0xe8/0x19c
> [ 6411.451426]  iomap_writepage_end_bio+0x38/0x50
> [ 6411.451427]  bio_endio+0x168/0x1ec
> [ 6411.451430]  blk_update_request+0x278/0x3f0
> [ 6411.451432]  blk_mq_end_request+0x34/0x15c
> [ 6411.451435]  virtblk_request_done+0x38/0x74 [virtio_blk]
> [ 6411.451437]  blk_done_softirq+0xc4/0x110
> [ 6411.451439]  __do_softirq+0x128/0x38c
> [ 6411.451441]  __irq_exit_rcu+0x118/0x150
> [ 6411.451442]  irq_exit+0x1c/0x30
> [ 6411.451445]  __handle_domain_irq+0x8c/0xf0
> [ 6411.451446]  gic_handle_irq+0x84/0x108
> [ 6411.451447]  el1_irq+0xcc/0x180
> [ 6411.451448]  arch_cpu_idle+0x18/0x40
> [ 6411.451450]  default_idle_call+0x4c/0x1a0
> [ 6411.451453]  cpuidle_idle_call+0x168/0x1e0
> [ 6411.451454]  do_idle+0xb4/0x104
> [ 6411.451455]  cpu_startup_entry+0x30/0x9c
> [ 6411.451458]  secondary_start_kernel+0x104/0x180
> [ 6411.451460] Code: d4210000 b0006161 910c8021 94013f4d (d4210000)
> [ 6411.451462] ---[ end trace 4a88c6a074082f8c ]---
> [ 6411.451464] Kernel panic - not syncing: Oops - BUG: Fatal exception in interrupt
>
> Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
> Suggested-by: Yang Shi <shy828301@gmail.com>
> Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
> Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>

Reviewed-by: Yang Shi <shy828301@gmail.com>

> ---
>  mm/khugepaged.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/mm/khugepaged.c b/mm/khugepaged.c
> index 045cc579f724..48de4e1b0783 100644
> --- a/mm/khugepaged.c
> +++ b/mm/khugepaged.c
> @@ -1763,6 +1763,10 @@ static void collapse_file(struct mm_struct *mm,
>                                 filemap_flush(mapping);
>                                 result = SCAN_FAIL;
>                                 goto xa_unlocked;
> +                       } else if (PageWriteback(page)) {
> +                               xas_unlock_irq(&xas);
> +                               result = SCAN_FAIL;
> +                               goto xa_unlocked;
>                         } else if (trylock_page(page)) {
>                                 get_page(page);
>                                 xas_unlock_irq(&xas);
> @@ -1798,7 +1802,8 @@ static void collapse_file(struct mm_struct *mm,
>                         goto out_unlock;
>                 }
>
> -               if (!is_shmem && PageDirty(page)) {
> +               if (!is_shmem && (PageDirty(page) ||
> +                                 PageWriteback(page))) {
>                         /*
>                          * khugepaged only works on read-only fd, so this
>                          * page is dirty because it hasn't been flushed
> --
> 2.27.0
>
>

^ permalink raw reply	[flat|nested] 61+ messages in thread

* [PATCH v4 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache
  2021-09-06 12:11 [PATCH 0/2] mm, thp: fix file-backed THP race in collapse_file Rongwei Wang
                   ` (5 preceding siblings ...)
  2021-10-06  2:18 ` [PATCH v3 v3 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache Rongwei Wang
@ 2021-10-11  2:22 ` Rongwei Wang
  2021-10-11  2:22   ` [PATCH v4 1/2] mm, thp: lock filemap when truncating page cache Rongwei Wang
  2021-10-11  2:22   ` [PATCH v4 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
  6 siblings, 2 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-10-11  2:22 UTC (permalink / raw)
  To: linux-mm, linux-kernel
  Cc: akpm, willy, song, william.kucharski, hughd, shy828301

Hi
We found two bugs related to file-backed THP in our cases, recently.
The two bugs rough description as following:

1. in truncate_inode_pages_range, subpage(s) of file-backed THP can be
revealed by find_get_entry.

2. 'collapse_file' miss the pages which in writeback but no private.
This situation will be triggered in XFS when block size is set to
PAGESIZE.

These two patches mainly fix the above mentioned bugs, and have been
tested in latest branch.

Changelog:

v3 -> v4:
- Patch "mm, thp: lock filemap when truncating page cache"
- Patch "mm, thp: bail out early in collapse_file for writeback page"
remove the timestamps from the commit log.

v2 -> v3:
- Patch "mm, thp: lock filemap when truncating page cache"
add filemap_invalidate_{un}lock before and after calling truncate_pagecache (Suggested by Song Liu and Matthew).

v1 -> v2:
- Patch "mm, thp: check page mapping when truncating page cache"
move the check of page mapping to behind lock_page.
- Patch "mm, thp: bail out early in collapse_file for writeback page"
check the writeback flag before taking page lock (Suggested by Yang Shi).

v1 link:
https://patchwork.kernel.org/project/linux-mm/cover/20210906121200.57905-1-rongwei.wang@linux.alibaba.com/
v2 link:
https://patchwork.kernel.org/project/linux-mm/patch/20210922070645.47345-2-rongwei.wang@linux.alibaba.com/
v3 link:
https://patchwork.kernel.org/project/linux-mm/cover/20211006021837.59721-1-rongwei.wang@linux.alibaba.com/

Rongwei Wang (2):
  mm, thp: lock filemap when truncating page cache
  mm, thp: bail out early in collapse_file for writeback page

 fs/open.c       | 5 ++++-
 mm/khugepaged.c | 7 ++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

-- 
2.27.0


^ permalink raw reply	[flat|nested] 61+ messages in thread

* [PATCH v4 1/2] mm, thp: lock filemap when truncating page cache
  2021-10-11  2:22 ` [PATCH v4 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache Rongwei Wang
@ 2021-10-11  2:22   ` Rongwei Wang
  2021-10-13  7:55     ` Rongwei Wang
  2021-10-11  2:22   ` [PATCH v4 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
  1 sibling, 1 reply; 61+ messages in thread
From: Rongwei Wang @ 2021-10-11  2:22 UTC (permalink / raw)
  To: linux-mm, linux-kernel
  Cc: akpm, willy, song, william.kucharski, hughd, shy828301

Transparent huge page has supported read-only non-shmem files. The file-
backed THP is collapsed by khugepaged and truncated when written (for
shared libraries).

However, there is a race when multiple writers truncate the same page
cache concurrently.

In that case, subpage(s) of file THP can be revealed by find_get_entry
in truncate_inode_pages_range, which will trigger PageTail BUG_ON in
truncate_inode_page, as follows.

page:000000009e420ff2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x7ff pfn:0x50c3ff
head:0000000075ff816d order:9 compound_mapcount:0 compound_pincount:0
flags: 0x37fffe0000010815(locked|uptodate|lru|arch_1|head)
raw: 37fffe0000000000 fffffe0013108001 dead000000000122 dead000000000400
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
head: 37fffe0000010815 fffffe001066bd48 ffff000404183c20 0000000000000000
head: 0000000000000600 0000000000000000 00000001ffffffff ffff000c0345a000
page dumped because: VM_BUG_ON_PAGE(PageTail(page))
------------[ cut here ]------------
kernel BUG at mm/truncate.c:213!
Internal error: Oops - BUG: 0 [#1] SMP
Modules linked in: xfs(E) libcrc32c(E) rfkill(E) ...
CPU: 14 PID: 11394 Comm: check_madvise_d Kdump: ...
Hardware name: ECS, BIOS 0.0.0 02/06/2015
pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
pc : truncate_inode_page+0x64/0x70
lr : truncate_inode_page+0x64/0x70
sp : ffff80001b60b900
x29: ffff80001b60b900 x28: 00000000000007ff
x27: ffff80001b60b9a0 x26: 0000000000000000
x25: 000000000000000f x24: ffff80001b60b9a0
x23: ffff80001b60ba18 x22: ffff0001e0999ea8
x21: ffff0000c21db300 x20: ffffffffffffffff
x19: fffffe001310ffc0 x18: 0000000000000020
x17: 0000000000000000 x16: 0000000000000000
x15: ffff0000c21db960 x14: 3030306666666620
x13: 6666666666666666 x12: 3130303030303030
x11: ffff8000117b69b8 x10: 00000000ffff8000
x9 : ffff80001012690c x8 : 0000000000000000
x7 : ffff8000114f69b8 x6 : 0000000000017ffd
x5 : ffff0007fffbcbc8 x4 : ffff80001b60b5c0
x3 : 0000000000000001 x2 : 0000000000000000
x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 truncate_inode_page+0x64/0x70
 truncate_inode_pages_range+0x550/0x7e4
 truncate_pagecache+0x58/0x80
 do_dentry_open+0x1e4/0x3c0
 vfs_open+0x38/0x44
 do_open+0x1f0/0x310
 path_openat+0x114/0x1dc
 do_filp_open+0x84/0x134
 do_sys_openat2+0xbc/0x164
 __arm64_sys_openat+0x74/0xc0
 el0_svc_common.constprop.0+0x88/0x220
 do_el0_svc+0x30/0xa0
 el0_svc+0x20/0x30
 el0_sync_handler+0x1a4/0x1b0
 el0_sync+0x180/0x1c0
Code: aa0103e0 900061e1 910ec021 9400d300 (d4210000)
---[ end trace f70cdb42cb7c2d42 ]---
Kernel panic - not syncing: Oops - BUG: Fatal exception

This patch mainly to lock filemap when one enter truncate_pagecache(),
avoiding truncating the same page cache concurrently.

Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
Suggested-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Song Liu <song@kernel.org>
Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
---
 fs/open.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/open.c b/fs/open.c
index daa324606a41..9ec3cfca3b1a 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -856,8 +856,11 @@ static int do_dentry_open(struct file *f,
 		 * of THPs into the page cache will fail.
 		 */
 		smp_mb();
-		if (filemap_nr_thps(inode->i_mapping))
+		if (filemap_nr_thps(inode->i_mapping)) {
+			filemap_invalidate_lock(inode->i_mapping);
 			truncate_pagecache(inode, 0);
+			filemap_invalidate_unlock(inode->i_mapping);
+		}
 	}
 
 	return 0;
-- 
2.27.0


^ permalink raw reply	[flat|nested] 61+ messages in thread

* [PATCH v4 2/2] mm, thp: bail out early in collapse_file for writeback page
  2021-10-11  2:22 ` [PATCH v4 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache Rongwei Wang
  2021-10-11  2:22   ` [PATCH v4 1/2] mm, thp: lock filemap when truncating page cache Rongwei Wang
@ 2021-10-11  2:22   ` Rongwei Wang
  2021-10-11  3:08     ` Matthew Wilcox
  2021-10-11  5:08     ` [PATCH v4 RESEND " Rongwei Wang
  1 sibling, 2 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-10-11  2:22 UTC (permalink / raw)
  To: linux-mm, linux-kernel
  Cc: akpm, willy, song, william.kucharski, hughd, shy828301

Currently collapse_file does not explicitly check PG_writeback, instead,
page_has_private and try_to_release_page are used to filter writeback
pages. This does not work for xfs with blocksize equal to or larger
than pagesize, because in such case xfs has no page->private.

This makes collapse_file bail out early for writeback page. Otherwise,
xfs end_page_writeback will panic as follows.

page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:ffff0003f88c86a8 index:0x0 pfn:0x84ef32
aops:xfs_address_space_operations [xfs] ino:30000b7 dentry name:"libtest.so"
flags: 0x57fffe0000008027(locked|referenced|uptodate|active|writeback)
raw: 57fffe0000008027 ffff80001b48bc28 ffff80001b48bc28 ffff0003f88c86a8
raw: 0000000000000000 0000000000000000 00000000ffffffff ffff0000c3e9a000
page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u <= 127u))
page->mem_cgroup:ffff0000c3e9a000
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:1212!
Internal error: Oops - BUG: 0 [#1] SMP
Modules linked in:
BUG: Bad page state in process khugepaged  pfn:84ef32
 xfs(E)
page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:0 index:0x0 pfn:0x84ef32
 libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) ...
CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Tainted: ...
pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
pc : end_page_writeback+0x1c0/0x214
lr : end_page_writeback+0x1c0/0x214
sp : ffff800011ce3cc0
x29: ffff800011ce3cc0 x28: 0000000000000000
x27: ffff000c04608040 x26: 0000000000000000
x25: ffff000c04608040 x24: 0000000000001000
x23: ffff0003f88c8530 x22: 0000000000001000
x21: ffff0003f88c8530 x20: 0000000000000000
x19: fffffe00201bcc80 x18: 0000000000000030
x17: 0000000000000000 x16: 0000000000000000
x15: ffff000c018f9760 x14: ffffffffffffffff
x13: ffff8000119d72b0 x12: ffff8000119d6ee3
x11: ffff8000117b69b8 x10: 00000000ffff8000
x9 : ffff800010617534 x8 : 0000000000000000
x7 : ffff8000114f69b8 x6 : 000000000000000f
x5 : 0000000000000000 x4 : 0000000000000000
x3 : 0000000000000400 x2 : 0000000000000000
x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 end_page_writeback+0x1c0/0x214
 iomap_finish_page_writeback+0x13c/0x204
 iomap_finish_ioend+0xe8/0x19c
 iomap_writepage_end_bio+0x38/0x50
 bio_endio+0x168/0x1ec
 blk_update_request+0x278/0x3f0
 blk_mq_end_request+0x34/0x15c
 virtblk_request_done+0x38/0x74 [virtio_blk]
 blk_done_softirq+0xc4/0x110
 __do_softirq+0x128/0x38c
 __irq_exit_rcu+0x118/0x150
 irq_exit+0x1c/0x30
 __handle_domain_irq+0x8c/0xf0
 gic_handle_irq+0x84/0x108
 el1_irq+0xcc/0x180
 arch_cpu_idle+0x18/0x40
 default_idle_call+0x4c/0x1a0
 cpuidle_idle_call+0x168/0x1e0
 do_idle+0xb4/0x104
 cpu_startup_entry+0x30/0x9c
 secondary_start_kernel+0x104/0x180
Code: d4210000 b0006161 910c8021 94013f4d (d4210000)
---[ end trace 4a88c6a074082f8c ]---
Kernel panic - not syncing: Oops - BUG: Fatal exception in interrupt

Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
Suggested-by: Yang Shi <shy828301@gmail.com>
Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Yang Shi <shy828301@gmail.com>
---
 mm/khugepaged.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 045cc579f724..48de4e1b0783 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -1763,6 +1763,10 @@ static void collapse_file(struct mm_struct *mm,
 				filemap_flush(mapping);
 				result = SCAN_FAIL;
 				goto xa_unlocked;
+			} else if (PageWriteback(page)) {
+				xas_unlock_irq(&xas);
+				result = SCAN_FAIL;
+				goto xa_unlocked;
 			} else if (trylock_page(page)) {
 				get_page(page);
 				xas_unlock_irq(&xas);
@@ -1798,7 +1802,8 @@ static void collapse_file(struct mm_struct *mm,
 			goto out_unlock;
 		}
 
-		if (!is_shmem && PageDirty(page)) {
+		if (!is_shmem && (PageDirty(page) ||
+				  PageWriteback(page))) {
 			/*
 			 * khugepaged only works on read-only fd, so this
 			 * page is dirty because it hasn't been flushed
-- 
2.27.0


^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v4 2/2] mm, thp: bail out early in collapse_file for writeback page
  2021-10-11  2:22   ` [PATCH v4 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
@ 2021-10-11  3:08     ` Matthew Wilcox
  2021-10-11  3:22       ` Rongwei Wang
  2021-10-11  5:08     ` [PATCH v4 RESEND " Rongwei Wang
  1 sibling, 1 reply; 61+ messages in thread
From: Matthew Wilcox @ 2021-10-11  3:08 UTC (permalink / raw)
  To: Rongwei Wang
  Cc: linux-mm, linux-kernel, akpm, song, william.kucharski, hughd, shy828301

On Mon, Oct 11, 2021 at 10:22:41AM +0800, Rongwei Wang wrote:
> Currently collapse_file does not explicitly check PG_writeback, instead,
> page_has_private and try_to_release_page are used to filter writeback
> pages. This does not work for xfs with blocksize equal to or larger
> than pagesize, because in such case xfs has no page->private.
> 
> This makes collapse_file bail out early for writeback page. Otherwise,
> xfs end_page_writeback will panic as follows.
> 
> Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")

This is the wrong Fixes line.  This same bug exists earlier than this.
Your testing may not show it before then, but if you mmap something
that isn't an executable, you can provoke it.  It should be:

Fixes: 99cb0dbd47a1 ("mm,thp: add read-only THP support for (non-shmem) FS")

(unless there's something I'm missing?)

Also, this should surely have a Cc: stable@vger.kernel.org in the
tags section?  It's a user-visible bug, we want it backported.

> Suggested-by: Yang Shi <shy828301@gmail.com>
> Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
> Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
> Reviewed-by: Yang Shi <shy828301@gmail.com>
> ---
>  mm/khugepaged.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/mm/khugepaged.c b/mm/khugepaged.c
> index 045cc579f724..48de4e1b0783 100644
> --- a/mm/khugepaged.c
> +++ b/mm/khugepaged.c
> @@ -1763,6 +1763,10 @@ static void collapse_file(struct mm_struct *mm,
>  				filemap_flush(mapping);
>  				result = SCAN_FAIL;
>  				goto xa_unlocked;
> +			} else if (PageWriteback(page)) {
> +				xas_unlock_irq(&xas);
> +				result = SCAN_FAIL;
> +				goto xa_unlocked;
>  			} else if (trylock_page(page)) {
>  				get_page(page);
>  				xas_unlock_irq(&xas);
> @@ -1798,7 +1802,8 @@ static void collapse_file(struct mm_struct *mm,
>  			goto out_unlock;
>  		}
>  
> -		if (!is_shmem && PageDirty(page)) {
> +		if (!is_shmem && (PageDirty(page) ||
> +				  PageWriteback(page))) {
>  			/*
>  			 * khugepaged only works on read-only fd, so this
>  			 * page is dirty because it hasn't been flushed
> -- 
> 2.27.0
> 

^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v4 2/2] mm, thp: bail out early in collapse_file for writeback page
  2021-10-11  3:08     ` Matthew Wilcox
@ 2021-10-11  3:22       ` Rongwei Wang
  0 siblings, 0 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-10-11  3:22 UTC (permalink / raw)
  To: Matthew Wilcox
  Cc: linux-mm, linux-kernel, akpm, song, william.kucharski, hughd, shy828301



On 10/11/21 11:08 AM, Matthew Wilcox wrote:
> On Mon, Oct 11, 2021 at 10:22:41AM +0800, Rongwei Wang wrote:
>> Currently collapse_file does not explicitly check PG_writeback, instead,
>> page_has_private and try_to_release_page are used to filter writeback
>> pages. This does not work for xfs with blocksize equal to or larger
>> than pagesize, because in such case xfs has no page->private.
>>
>> This makes collapse_file bail out early for writeback page. Otherwise,
>> xfs end_page_writeback will panic as follows.
>>
>> Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
> 
> This is the wrong Fixes line.  This same bug exists earlier than this.
> Your testing may not show it before then, but if you mmap something
> that isn't an executable, you can provoke it.  It should be:
> 
> Fixes: 99cb0dbd47a1 ("mm,thp: add read-only THP support for (non-shmem) FS")
> 
> (unless there's something I'm missing?)
Hi, Matthew
I forget the Patch #2 fix the bug that is different with Patch #1. I 
will update this.

Thanks for your remind!
> 
> Also, this should surely have a Cc: stable@vger.kernel.org in the
> tags section?  It's a user-visible bug, we want it backported.
OK, Thanks!
> 
>> Suggested-by: Yang Shi <shy828301@gmail.com>
>> Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
>> Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
>> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
>> Reviewed-by: Yang Shi <shy828301@gmail.com>
>> ---
>>   mm/khugepaged.c | 7 ++++++-
>>   1 file changed, 6 insertions(+), 1 deletion(-)
>>
>> diff --git a/mm/khugepaged.c b/mm/khugepaged.c
>> index 045cc579f724..48de4e1b0783 100644
>> --- a/mm/khugepaged.c
>> +++ b/mm/khugepaged.c
>> @@ -1763,6 +1763,10 @@ static void collapse_file(struct mm_struct *mm,
>>   				filemap_flush(mapping);
>>   				result = SCAN_FAIL;
>>   				goto xa_unlocked;
>> +			} else if (PageWriteback(page)) {
>> +				xas_unlock_irq(&xas);
>> +				result = SCAN_FAIL;
>> +				goto xa_unlocked;
>>   			} else if (trylock_page(page)) {
>>   				get_page(page);
>>   				xas_unlock_irq(&xas);
>> @@ -1798,7 +1802,8 @@ static void collapse_file(struct mm_struct *mm,
>>   			goto out_unlock;
>>   		}
>>   
>> -		if (!is_shmem && PageDirty(page)) {
>> +		if (!is_shmem && (PageDirty(page) ||
>> +				  PageWriteback(page))) {
>>   			/*
>>   			 * khugepaged only works on read-only fd, so this
>>   			 * page is dirty because it hasn't been flushed
>> -- 
>> 2.27.0
>>

^ permalink raw reply	[flat|nested] 61+ messages in thread

* [PATCH v4 RESEND 2/2] mm, thp: bail out early in collapse_file for writeback page
  2021-10-11  2:22   ` [PATCH v4 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
  2021-10-11  3:08     ` Matthew Wilcox
@ 2021-10-11  5:08     ` Rongwei Wang
  1 sibling, 0 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-10-11  5:08 UTC (permalink / raw)
  To: linux-mm, linux-kernel
  Cc: stable, akpm, willy, song, william.kucharski, hughd, shy828301

Currently collapse_file does not explicitly check PG_writeback, instead,
page_has_private and try_to_release_page are used to filter writeback
pages. This does not work for xfs with blocksize equal to or larger
than pagesize, because in such case xfs has no page->private.

This makes collapse_file bail out early for writeback page. Otherwise,
xfs end_page_writeback will panic as follows.

page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:ffff0003f88c86a8 index:0x0 pfn:0x84ef32
aops:xfs_address_space_operations [xfs] ino:30000b7 dentry name:"libtest.so"
flags: 0x57fffe0000008027(locked|referenced|uptodate|active|writeback)
raw: 57fffe0000008027 ffff80001b48bc28 ffff80001b48bc28 ffff0003f88c86a8
raw: 0000000000000000 0000000000000000 00000000ffffffff ffff0000c3e9a000
page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u <= 127u))
page->mem_cgroup:ffff0000c3e9a000
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:1212!
Internal error: Oops - BUG: 0 [#1] SMP
Modules linked in:
BUG: Bad page state in process khugepaged  pfn:84ef32
 xfs(E)
page:fffffe00201bcc80 refcount:0 mapcount:0 mapping:0 index:0x0 pfn:0x84ef32
 libcrc32c(E) rfkill(E) aes_ce_blk(E) crypto_simd(E) ...
CPU: 25 PID: 0 Comm: swapper/25 Kdump: loaded Tainted: ...
pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
pc : end_page_writeback+0x1c0/0x214
lr : end_page_writeback+0x1c0/0x214
sp : ffff800011ce3cc0
x29: ffff800011ce3cc0 x28: 0000000000000000
x27: ffff000c04608040 x26: 0000000000000000
x25: ffff000c04608040 x24: 0000000000001000
x23: ffff0003f88c8530 x22: 0000000000001000
x21: ffff0003f88c8530 x20: 0000000000000000
x19: fffffe00201bcc80 x18: 0000000000000030
x17: 0000000000000000 x16: 0000000000000000
x15: ffff000c018f9760 x14: ffffffffffffffff
x13: ffff8000119d72b0 x12: ffff8000119d6ee3
x11: ffff8000117b69b8 x10: 00000000ffff8000
x9 : ffff800010617534 x8 : 0000000000000000
x7 : ffff8000114f69b8 x6 : 000000000000000f
x5 : 0000000000000000 x4 : 0000000000000000
x3 : 0000000000000400 x2 : 0000000000000000
x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 end_page_writeback+0x1c0/0x214
 iomap_finish_page_writeback+0x13c/0x204
 iomap_finish_ioend+0xe8/0x19c
 iomap_writepage_end_bio+0x38/0x50
 bio_endio+0x168/0x1ec
 blk_update_request+0x278/0x3f0
 blk_mq_end_request+0x34/0x15c
 virtblk_request_done+0x38/0x74 [virtio_blk]
 blk_done_softirq+0xc4/0x110
 __do_softirq+0x128/0x38c
 __irq_exit_rcu+0x118/0x150
 irq_exit+0x1c/0x30
 __handle_domain_irq+0x8c/0xf0
 gic_handle_irq+0x84/0x108
 el1_irq+0xcc/0x180
 arch_cpu_idle+0x18/0x40
 default_idle_call+0x4c/0x1a0
 cpuidle_idle_call+0x168/0x1e0
 do_idle+0xb4/0x104
 cpu_startup_entry+0x30/0x9c
 secondary_start_kernel+0x104/0x180
Code: d4210000 b0006161 910c8021 94013f4d (d4210000)
---[ end trace 4a88c6a074082f8c ]---
Kernel panic - not syncing: Oops - BUG: Fatal exception in interrupt

Fixes: 99cb0dbd47a1 ("mm,thp: add read-only THP support for (non-shmem) FS")
Suggested-by: Yang Shi <shy828301@gmail.com>
Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
Cc: stable@vger.kernel.org
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Yang Shi <shy828301@gmail.com>
---
 mm/khugepaged.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 045cc579f724..48de4e1b0783 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -1763,6 +1763,10 @@ static void collapse_file(struct mm_struct *mm,
 				filemap_flush(mapping);
 				result = SCAN_FAIL;
 				goto xa_unlocked;
+			} else if (PageWriteback(page)) {
+				xas_unlock_irq(&xas);
+				result = SCAN_FAIL;
+				goto xa_unlocked;
 			} else if (trylock_page(page)) {
 				get_page(page);
 				xas_unlock_irq(&xas);
@@ -1798,7 +1802,8 @@ static void collapse_file(struct mm_struct *mm,
 			goto out_unlock;
 		}
 
-		if (!is_shmem && PageDirty(page)) {
+		if (!is_shmem && (PageDirty(page) ||
+				  PageWriteback(page))) {
 			/*
 			 * khugepaged only works on read-only fd, so this
 			 * page is dirty because it hasn't been flushed
-- 
2.27.0


^ permalink raw reply	[flat|nested] 61+ messages in thread

* Re: [PATCH v4 1/2] mm, thp: lock filemap when truncating page cache
  2021-10-11  2:22   ` [PATCH v4 1/2] mm, thp: lock filemap when truncating page cache Rongwei Wang
@ 2021-10-13  7:55     ` Rongwei Wang
  0 siblings, 0 replies; 61+ messages in thread
From: Rongwei Wang @ 2021-10-13  7:55 UTC (permalink / raw)
  To: willy, hughd, song, shy828301
  Cc: akpm, william.kucharski, linux-mm, linux-kernel

Hello

I see this patch has not been replied by all. I'm not sure whether this 
patch has passed review or the status needs to be modified.

Thanks!

On 10/11/21 10:22 AM, Rongwei Wang wrote:
> Transparent huge page has supported read-only non-shmem files. The file-
> backed THP is collapsed by khugepaged and truncated when written (for
> shared libraries).
> 
> However, there is a race when multiple writers truncate the same page
> cache concurrently.
> 
> In that case, subpage(s) of file THP can be revealed by find_get_entry
> in truncate_inode_pages_range, which will trigger PageTail BUG_ON in
> truncate_inode_page, as follows.
> 
> page:000000009e420ff2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x7ff pfn:0x50c3ff
> head:0000000075ff816d order:9 compound_mapcount:0 compound_pincount:0
> flags: 0x37fffe0000010815(locked|uptodate|lru|arch_1|head)
> raw: 37fffe0000000000 fffffe0013108001 dead000000000122 dead000000000400
> raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
> head: 37fffe0000010815 fffffe001066bd48 ffff000404183c20 0000000000000000
> head: 0000000000000600 0000000000000000 00000001ffffffff ffff000c0345a000
> page dumped because: VM_BUG_ON_PAGE(PageTail(page))
> ------------[ cut here ]------------
> kernel BUG at mm/truncate.c:213!
> Internal error: Oops - BUG: 0 [#1] SMP
> Modules linked in: xfs(E) libcrc32c(E) rfkill(E) ...
> CPU: 14 PID: 11394 Comm: check_madvise_d Kdump: ...
> Hardware name: ECS, BIOS 0.0.0 02/06/2015
> pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
> pc : truncate_inode_page+0x64/0x70
> lr : truncate_inode_page+0x64/0x70
> sp : ffff80001b60b900
> x29: ffff80001b60b900 x28: 00000000000007ff
> x27: ffff80001b60b9a0 x26: 0000000000000000
> x25: 000000000000000f x24: ffff80001b60b9a0
> x23: ffff80001b60ba18 x22: ffff0001e0999ea8
> x21: ffff0000c21db300 x20: ffffffffffffffff
> x19: fffffe001310ffc0 x18: 0000000000000020
> x17: 0000000000000000 x16: 0000000000000000
> x15: ffff0000c21db960 x14: 3030306666666620
> x13: 6666666666666666 x12: 3130303030303030
> x11: ffff8000117b69b8 x10: 00000000ffff8000
> x9 : ffff80001012690c x8 : 0000000000000000
> x7 : ffff8000114f69b8 x6 : 0000000000017ffd
> x5 : ffff0007fffbcbc8 x4 : ffff80001b60b5c0
> x3 : 0000000000000001 x2 : 0000000000000000
> x1 : 0000000000000000 x0 : 0000000000000000
> Call trace:
>   truncate_inode_page+0x64/0x70
>   truncate_inode_pages_range+0x550/0x7e4
>   truncate_pagecache+0x58/0x80
>   do_dentry_open+0x1e4/0x3c0
>   vfs_open+0x38/0x44
>   do_open+0x1f0/0x310
>   path_openat+0x114/0x1dc
>   do_filp_open+0x84/0x134
>   do_sys_openat2+0xbc/0x164
>   __arm64_sys_openat+0x74/0xc0
>   el0_svc_common.constprop.0+0x88/0x220
>   do_el0_svc+0x30/0xa0
>   el0_svc+0x20/0x30
>   el0_sync_handler+0x1a4/0x1b0
>   el0_sync+0x180/0x1c0
> Code: aa0103e0 900061e1 910ec021 9400d300 (d4210000)
> ---[ end trace f70cdb42cb7c2d42 ]---
> Kernel panic - not syncing: Oops - BUG: Fatal exception
> 
> This patch mainly to lock filemap when one enter truncate_pagecache(),
> avoiding truncating the same page cache concurrently.
> 
> Fixes: eb6ecbed0aa2 ("mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs")
> Suggested-by: Matthew Wilcox (Oracle) <willy@infradead.org>
> Tested-by: Song Liu <song@kernel.org>
> Signed-off-by: Xu Yu <xuyu@linux.alibaba.com>
> Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
> ---
>   fs/open.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/open.c b/fs/open.c
> index daa324606a41..9ec3cfca3b1a 100644
> --- a/fs/open.c
> +++ b/fs/open.c
> @@ -856,8 +856,11 @@ static int do_dentry_open(struct file *f,
>   		 * of THPs into the page cache will fail.
>   		 */
>   		smp_mb();
> -		if (filemap_nr_thps(inode->i_mapping))
> +		if (filemap_nr_thps(inode->i_mapping)) {
> +			filemap_invalidate_lock(inode->i_mapping);
>   			truncate_pagecache(inode, 0);
> +			filemap_invalidate_unlock(inode->i_mapping);
> +		}
>   	}
>   
>   	return 0;
> 

^ permalink raw reply	[flat|nested] 61+ messages in thread

end of thread, other threads:[~2021-10-13  7:55 UTC | newest]

Thread overview: 61+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-09-06 12:11 [PATCH 0/2] mm, thp: fix file-backed THP race in collapse_file Rongwei Wang
2021-09-06 12:11 ` [PATCH 1/2] mm, thp: check page mapping when truncating page cache Rongwei Wang
2021-09-07  2:49   ` Yu Xu
2021-09-07 18:08   ` Yang Shi
     [not found]     ` <38AF4DC8-5E6F-4568-B2E3-0434BD847BC9@linux.alibaba.com>
2021-09-08 21:48       ` Yang Shi
2021-09-13 14:49   ` [mm, thp] 20753096b6: BUG:unable_to_handle_page_fault_for_address kernel test robot
2021-09-06 12:12 ` [PATCH 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
2021-09-07 16:56   ` Yang Shi
     [not found]     ` <44BE85B4-692C-41E8-B5A0-C1E0B0272ACD@linux.alibaba.com>
2021-09-08 21:51       ` Yang Shi
2021-09-22  7:06 ` [PATCH v2 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache Rongwei Wang
2021-09-22  7:06 ` [PATCH v2 1/2] mm, thp: check page mapping when truncating page cache Rongwei Wang
2021-09-22 11:37   ` Matthew Wilcox
2021-09-22 17:04     ` Rongwei Wang
2021-09-24  2:43       ` Andrew Morton
2021-09-24  3:08         ` Yang Shi
2021-09-24  3:35         ` Rongwei Wang
2021-09-24  7:12         ` Rongwei Wang
2021-09-27 22:24           ` Song Liu
2021-09-28 12:06             ` Matthew Wilcox
2021-09-28 16:59               ` Song Liu
2021-09-28 16:20             ` Rongwei Wang
2021-09-29  7:14               ` Song Liu
2021-09-29  7:50                 ` Rongwei Wang
2021-09-29 16:59                   ` Song Liu
2021-09-29 17:55                     ` Matthew Wilcox
2021-09-29 23:41                       ` Song Liu
2021-09-30  0:00                         ` Matthew Wilcox
2021-09-30  0:41                           ` Song Liu
2021-09-30  2:14                             ` Rongwei Wang
2021-10-04 17:26                             ` Rongwei Wang
2021-10-04 19:05                               ` Matthew Wilcox
2021-10-05  1:58                                 ` Rongwei Wang
2021-10-04 20:26                               ` Song Liu
2021-10-05  2:58                               ` Hugh Dickins
2021-10-05  3:07                                 ` Matthew Wilcox
2021-10-05  9:03                                 ` Rongwei Wang
2021-09-30  1:54                         ` Rongwei Wang
2021-09-30  3:26                           ` Song Liu
2021-09-30  5:24                             ` Hugh Dickins
2021-09-30 15:28                               ` Matthew Wilcox
2021-09-30 16:49                                 ` Hugh Dickins
2021-09-30 17:39                                   ` Yang Shi
2021-10-02 17:08                                     ` Matthew Wilcox
2021-10-04 18:28                                       ` Yang Shi
2021-10-04 19:31                                         ` Matthew Wilcox
2021-10-05  2:26                                           ` Hugh Dickins
2021-10-02  2:22                                   ` Rongwei Wang
2021-09-22  7:06 ` [PATCH v2 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
2021-10-06  2:18 ` [PATCH v3 v3 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache Rongwei Wang
2021-10-06  2:18   ` [PATCH v3 v3 1/2] mm, thp: lock filemap when truncating page cache Rongwei Wang
2021-10-06  2:18   ` [PATCH v3 v3 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
2021-10-06  2:41     ` Matthew Wilcox
2021-10-06  8:39       ` Rongwei Wang
2021-10-06 17:58     ` Yang Shi
2021-10-11  2:22 ` [PATCH v4 0/2] mm, thp: fix file-backed THP race in collapse_file and truncate pagecache Rongwei Wang
2021-10-11  2:22   ` [PATCH v4 1/2] mm, thp: lock filemap when truncating page cache Rongwei Wang
2021-10-13  7:55     ` Rongwei Wang
2021-10-11  2:22   ` [PATCH v4 2/2] mm, thp: bail out early in collapse_file for writeback page Rongwei Wang
2021-10-11  3:08     ` Matthew Wilcox
2021-10-11  3:22       ` Rongwei Wang
2021-10-11  5:08     ` [PATCH v4 RESEND " Rongwei Wang

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).