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| author | Shaohua Li <shli@fb.com> | 2016-04-25 16:52:38 -0700 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2016-04-25 18:21:33 -0700 |
| commit | 9c573de3283af007ea11c17bde1e4568d9417328 (patch) | |
| tree | 65df34db491d33e1432691b5ec69d53388df6f4f /Documentation/SM501.txt | |
| parent | b297874a2d5c5fcaeb5242a8b4708e54c5477d90 (diff) | |
| download | linux-9c573de3283af007ea11c17bde1e4568d9417328.tar.gz linux-9c573de3283af007ea11c17bde1e4568d9417328.tar.bz2 linux-9c573de3283af007ea11c17bde1e4568d9417328.zip | |
MD: make bio mergeable
blk_queue_split marks bio unmergeable, which makes sense for normal bio.
But if dispatching the bio to underlayer disk, the blk_queue_split
checks are invalid, hence it's possible the bio becomes mergeable.
In the reported bug, this bug causes trim against raid0 performance slash
https://bugzilla.kernel.org/show_bug.cgi?id=117051
Reported-and-tested-by: Park Ju Hyung <qkrwngud825@gmail.com>
Fixes: 6ac45aeb6bca(block: avoid to merge splitted bio)
Cc: stable@vger.kernel.org (v4.3+)
Cc: Ming Lei <ming.lei@canonical.com>
Cc: Neil Brown <neilb@suse.de>
Reviewed-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'Documentation/SM501.txt')
0 files changed, 0 insertions, 0 deletions