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From: Faiyaz Mohammed <faiyazm@codeaurora.org>
To: akpm@linux-foundation.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Cc: guptap@codeaurora.org, Faiyaz Mohammed <faiyazm@codeaurora.org>
Subject: [PATCH v1] mm: page_alloc: Add debug log in free_reserved_area for static memory
Date: Tue, 28 Sep 2021 14:34:09 +0530	[thread overview]
Message-ID: <1632819849-511-1-git-send-email-faiyazm@codeaurora.org> (raw)

For INITRD and initmem memory is reserved through "memblock_reserve"
during boot up but it is free via "free_reserved_area" instead
of "memblock_free".
For example:
[    0.294848] Freeing initrd memory: 12K.
[    0.696688] Freeing unused kernel memory: 4096K.

To get the start and end address of the above freed memory and to account
proper memblock added memblock_dbg log in "free_reserved_area".
After adding log:
[    0.294837] memblock_free: [0x00000083600000-0x00000083603000] free_initrd_mem+0x20/0x28
[    0.294848] Freeing initrd memory: 12K.
[    0.695246] memblock_free: [0x00000081600000-0x00000081a00000] free_initmem+0x70/0xc8
[    0.696688] Freeing unused kernel memory: 4096K.

Signed-off-by: Faiyaz Mohammed <faiyazm@codeaurora.org>
---
 mm/page_alloc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index b37435c..f85c3b2 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -8129,6 +8129,11 @@ unsigned long free_reserved_area(void *start, void *end, int poison, const char
 		pr_info("Freeing %s memory: %ldK\n",
 			s, pages << (PAGE_SHIFT - 10));
 
+#ifdef CONFIG_HAVE_MEMBLOCK
+		memblock_dbg("memblock_free: [%#016llx-%#016llx] %pS\n",
+			__pa(start), __pa(end), (void *)_RET_IP_);
+#endif
+
 	return pages;
 }
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a
member of the Code Aurora Forum, hosted by The Linux Foundation


             reply	other threads:[~2021-09-28  9:04 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-28  9:04 Faiyaz Mohammed [this message]
2021-09-28 10:39 ` David Hildenbrand
2021-09-28 10:53   ` Faiyaz Mohammed
2021-09-28 11:16     ` David Hildenbrand
2021-09-29  8:58       ` Faiyaz Mohammed
2021-09-29 17:03         ` David Hildenbrand
2021-10-06 12:13           ` Faiyaz Mohammed
2021-10-06 12:18             ` David Hildenbrand
2021-10-06 14:22               ` Faiyaz Mohammed
2021-10-11  6:49               ` Faiyaz Mohammed

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