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blk-flush: fix rq->flush.seq for post-flush requests

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If the policy == (REQ_FSEQ_DATA | REQ_FSEQ_POSTFLUSH), it means that the
data sequence and post-flush sequence need to be done for this request.

The rq->flush.seq should record what sequences have been done (or don't
need to be done). So in this case, pre-flush doesn't need to be done,
we should init rq->flush.seq to REQ_FSEQ_PREFLUSH not REQ_FSEQ_POSTFLUSH.

Fixes: 615939a2ae ("blk-mq: defer to the normal submission path for post-flush requests")
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230717040058.3993930-3-chengming.zhou@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Chengming Zhou 2023-07-17 12:00:56 +08:00 committed by Jens Axboe
parent 660e802c76
commit 28b2412374
1 changed files with 1 additions and 1 deletions
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2
block/blk-flush.c
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@ -443,7 +443,7 @@ bool blk_insert_flush(struct request *rq)
* the post flush, and then just pass the command on.
*/
blk_rq_init_flush(rq);
rq->flush.seq |= REQ_FSEQ_POSTFLUSH;
rq->flush.seq |= REQ_FSEQ_PREFLUSH;
spin_lock_irq(&fq->mq_flush_lock);
list_move_tail(&rq->flush.list, &fq->flush_data_in_flight);
spin_unlock_irq(&fq->mq_flush_lock);