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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 02/11] mm: allow read-ahead with IOCB_NOWAIT set
Date: Fri, 22 May 2020 14:23:02 -0600	[thread overview]
Message-ID: <20200522202311.10959-3-axboe@kernel.dk> (raw)
In-Reply-To: <20200522202311.10959-1-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


  parent reply	other threads:[~2020-05-22 20:24 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-22 20:23 [PATCHSET RFC 0/11] Add support for async buffered reads Jens Axboe
2020-05-22 20:23 ` [PATCH 01/11] block: read-ahead submission should imply no-wait as well Jens Axboe
2020-05-22 20:23 ` Jens Axboe [this message]
2020-05-22 20:23 ` [PATCH 03/11] mm: add support for async page locking Jens Axboe
2020-05-22 20:57   ` [PATCH v2 " Jens Axboe
2020-05-22 20:23 ` [PATCH 04/11] mm: support async buffered reads in generic_file_buffered_read() Jens Axboe
2020-05-22 20:23 ` [PATCH 05/11] fs: add FMODE_BUF_RASYNC Jens Axboe
2020-05-22 20:23 ` [PATCH 06/11] ext4: flag as supporting buffered async reads Jens Axboe
2020-05-22 20:23 ` [PATCH 07/11] block: flag block devices as supporting IOCB_WAITQ Jens Axboe
2020-05-22 20:23 ` [PATCH 08/11] xfs: flag files as supporting buffered async reads Jens Axboe
2020-05-22 20:23 ` [PATCH 09/11] btrfs: " Jens Axboe
2020-05-22 20:23 ` [PATCH 10/11] mm: add kiocb_wait_page_async_init() helper Jens Axboe
2020-05-22 20:23 ` [PATCH 11/11] io_uring: support true async buffered reads, if file provides it Jens Axboe
2020-05-23  1:50 [PATCHSET v2 RFC 0/11] Add support for async buffered reads Jens Axboe
2020-05-23  1:50 ` [PATCH 02/11] mm: allow read-ahead with IOCB_NOWAIT set Jens Axboe

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