blk-mq: wait on correct sbitmap_queue in blk_mq_mark_tag_wait

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[ Upstream commit 98b99e9412 ]

For shared queues case, we will only wait on bitmap_tags if we fail to get
driver tag. However, rq could be from breserved_tags, then two problems
will occur:
1. io hung if no tag is currently allocated from bitmap_tags.
2. unnecessary wakeup when tag is freed to bitmap_tags while no tag is
freed to breserved_tags.
Wait on the bitmap which rq from to fix this.

Fixes: f906a6a0f4 ("blk-mq: improve tag waiting setup for non-shared tags")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Kemeng Shi 2023-01-18 17:37:15 +08:00 • committed by Greg Kroah-Hartman

parent ec64867f8d

commit 559c1d69c1

1 changed files with 5 additions and 1 deletions

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block/blk-mq.c

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