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blk-mq: do not do head insertions post-pre-flush commands 

blk_flush_complete_seq currently queues requests that write data after
a pre-flush from the flush state machine at the head of the queue.
This doesn't really make sense, as the original request bypassed all
queue lists by directly diverting to blk_insert_flush from
blk_mq_submit_bio.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230519044050.107790-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-05-19 06:40:49 +02:00 committed by Jens Axboe
parent 615939a2ae
commit 1e82fadfc6
1 changed files with 1 additions and 1 deletions
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2
block/blk-flush.c
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@ -188,7 +188,7 @@ static void blk_flush_complete_seq(struct request *rq,
case REQ_FSEQ_DATA:
list_move_tail(&rq->flush.list, &fq->flush_data_in_flight);
blk_mq_add_to_requeue_list(rq, BLK_MQ_INSERT_AT_HEAD);
blk_mq_add_to_requeue_list(rq, 0);
blk_mq_kick_requeue_list(q);
break;