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| author | Ming Lei <ming.lei@redhat.com> | 2021-07-29 11:42:26 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-15 09:50:28 +0200 |
| commit | 87aa69aa10b420823174eedcfd16366ad3d7fe93 (patch) | |
| tree | 8e312a517de4185fea9bcfa6a8f32b56e1329ef3 /drivers/spi | |
| parent | 3868507181534fee3d8d03130f40f579e52cd0a7 (diff) | |
block: return ELEVATOR_DISCARD_MERGE if possible
[ Upstream commit 866663b7b52d2da267b28e12eed89ee781b8fed1 ]
When merging one bio to request, if they are discard IO and the queue
supports multi-range discard, we need to return ELEVATOR_DISCARD_MERGE
because both block core and related drivers(nvme, virtio-blk) doesn't
handle mixed discard io merge(traditional IO merge together with
discard merge) well.
Fix the issue by returning ELEVATOR_DISCARD_MERGE in this situation,
so both blk-mq and drivers just need to handle multi-range discard.
Reported-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Fixes: 2705dfb20947 ("block: fix discard request merge")
Link: https://lore.kernel.org/r/20210729034226.1591070-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/spi')
0 files changed, 0 insertions, 0 deletions