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From: Jens Axboe <axboe@kernel.dk>
To: linux-fsdevel@vger.kernel.org
Cc: viro@zeniv.linux.org.uk, akpm@linux-foundation.org,
	Jens Axboe <axboe@kernel.dk>
Subject: [PATCH 2/3] btrfs: readpages() should submit IO as read-ahead
Date: Thu, 24 May 2018 10:02:53 -0600	[thread overview]
Message-ID: <1527177774-21414-3-git-send-email-axboe@kernel.dk> (raw)
In-Reply-To: <1527177774-21414-1-git-send-email-axboe@kernel.dk>

a_ops->readpages() is only ever used for read-ahead. Ensure that we
pass this information down to the block layer.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/btrfs/extent_io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index e99b329002cf..32034bc1e2b9 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3119,7 +3119,7 @@ static inline void __do_contiguous_readpages(struct extent_io_tree *tree,
 
 	for (index = 0; index < nr_pages; index++) {
 		__do_readpage(tree, pages[index], btrfs_get_extent, em_cached,
-				bio, 0, bio_flags, 0, prev_em_start);
+				bio, 0, bio_flags, REQ_RAHEAD, prev_em_start);
 		put_page(pages[index]);
 	}
 }
-- 
2.7.4

  parent reply	other threads:[~2018-05-24 16:03 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-24 16:02 [PATCHSET 0/3] Submit ->readpages() IO as read-ahead Jens Axboe
2018-05-24 16:02 ` [PATCH 1/3] mpage: mpage_readpages() should submit " Jens Axboe
2018-05-24 19:43   ` Andrew Morton
2018-05-24 19:57     ` Matthew Wilcox
2018-05-24 20:24       ` Jens Axboe
2018-05-29 14:36     ` Jens Axboe
2018-05-29 21:59       ` Andrew Morton
2018-05-29 22:18         ` Jens Axboe
2018-05-29 22:37           ` Jens Axboe
2018-05-24 16:02 ` Jens Axboe [this message]
2018-05-24 16:02 ` [PATCH 3/3] ext4: readpages() " Jens Axboe
2018-05-24 20:47   ` Theodore Y. Ts'o
2018-05-24 20:53     ` Jens Axboe
2018-05-24 21:05       ` Jens Axboe
2018-05-25  8:32 ` [PATCHSET 0/3] Submit ->readpages() " Christoph Hellwig
2018-05-25 14:21   ` Jens Axboe

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