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author | Kemeng Shi <shikemeng@huaweicloud.com> | 2023-01-18 12:37:15 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-10 11:32:43 +0300 |
commit | b1f6feff7c6afff3b0fa834e7f192ecc87e7ce53 (patch) | |
tree | 0fc1342dfad53db4c403e177d1645050ffdd6358 /block/Makefile | |
parent | ad756d8cae3b99186b6f7c4769d0e3cafd7701b4 (diff) | |
download | linux-b1f6feff7c6afff3b0fa834e7f192ecc87e7ce53.tar.xz |
blk-mq: wait on correct sbitmap_queue in blk_mq_mark_tag_wait
[ Upstream commit 98b99e9412d0cde8c7b442bf5efb09528a2ede8b ]
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: f906a6a0f426 ("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>
Diffstat (limited to 'block/Makefile')
0 files changed, 0 insertions, 0 deletions