6.5-stable review patch. If anyone has any objections, please let me know.
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From: Chengming Zhou zhouchengming@bytedance.com
[ Upstream commit 28b241237470981a96fbd82077c8044466b61e5f ]
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: 615939a2ae73 ("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 Signed-off-by: Sasha Levin sashal@kernel.org --- block/blk-flush.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-flush.c b/block/blk-flush.c index 8220517c2d67d..fdc489e0ea162 100644 --- a/block/blk-flush.c +++ b/block/blk-flush.c @@ -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);