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From: Jens Axboe <axboe@kernel.dk>
To: io-uring@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, Jens Axboe <axboe@kernel.dk>
Subject: [PATCH 02/12] mm: allow read-ahead with IOCB_NOWAIT set
Date: Sat, 23 May 2020 12:57:45 -0600 [thread overview]
Message-ID: <20200523185755.8494-3-axboe@kernel.dk> (raw)
In-Reply-To: <20200523185755.8494-1-axboe@kernel.dk>
The read-ahead shouldn't block, so allow it to be done even if
IOCB_NOWAIT is set in the kiocb.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
mm/filemap.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index 23a051a7ef0f..80747f1377d5 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2031,8 +2031,6 @@ static ssize_t generic_file_buffered_read(struct kiocb *iocb,
page = find_get_page(mapping, index);
if (!page) {
- if (iocb->ki_flags & IOCB_NOWAIT)
- goto would_block;
page_cache_sync_readahead(mapping,
ra, filp,
index, last_index - index);
--
2.26.2
next prev parent reply other threads:[~2020-05-23 18:58 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-23 18:57 [PATCHSET v2 0/12] Add support for async buffered reads Jens Axboe
2020-05-23 18:57 ` [PATCH 01/12] block: read-ahead submission should imply no-wait as well Jens Axboe
2020-05-23 18:57 ` Jens Axboe [this message]
2020-05-23 18:57 ` [PATCH 03/12] mm: abstract out wake_page_match() from wake_page_function() Jens Axboe
2020-05-23 18:57 ` [PATCH 04/12] mm: add support for async page locking Jens Axboe
2020-05-23 18:57 ` [PATCH 05/12] mm: support async buffered reads in generic_file_buffered_read() Jens Axboe
2020-05-24 14:05 ` Trond Myklebust
2020-05-24 16:30 ` Jens Axboe
2020-05-24 16:40 ` Jens Axboe
2020-05-24 17:11 ` Trond Myklebust
2020-05-24 17:12 ` Jens Axboe
2020-05-23 18:57 ` [PATCH 06/12] fs: add FMODE_BUF_RASYNC Jens Axboe
2020-05-23 18:57 ` [PATCH 07/12] ext4: flag as supporting buffered async reads Jens Axboe
2020-05-23 18:57 ` [PATCH 08/12] block: flag block devices as supporting IOCB_WAITQ Jens Axboe
2020-05-23 18:57 ` [PATCH 09/12] xfs: flag files as supporting buffered async reads Jens Axboe
2020-05-23 18:57 ` [PATCH 10/12] btrfs: " Jens Axboe
2020-05-23 18:57 ` [PATCH 11/12] mm: add kiocb_wait_page_queue_init() helper Jens Axboe
2020-05-23 18:57 ` [PATCH 12/12] io_uring: support true async buffered reads, if file provides it Jens Axboe
2020-05-25 7:29 ` Pavel Begunkov
2020-05-25 19:59 ` Jens Axboe
2020-05-26 7:44 ` Pavel Begunkov
2020-05-26 13:50 ` Jens Axboe
2020-05-26 7:38 ` Pavel Begunkov
2020-05-26 13:47 ` Jens Axboe
2020-05-23 19:20 ` [PATCHSET v2 0/12] Add support for async buffered reads Jens Axboe
2020-05-24 9:46 ` Chris Panayis
2020-05-24 19:24 ` Jens Axboe
2020-05-24 19:21 [PATCHSET v4 " Jens Axboe
2020-05-24 19:21 ` [PATCH 02/12] mm: allow read-ahead with IOCB_NOWAIT set Jens Axboe
2020-05-26 19:51 [PATCHSET v5 0/12] Add support for async buffered reads Jens Axboe
2020-05-26 19:51 ` [PATCH 02/12] mm: allow read-ahead with IOCB_NOWAIT set Jens Axboe
2020-05-26 20:45 ` Johannes Weiner
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