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block: Initialize bio priority earlier

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Bio's IO priority needs to be initialized before we try to merge the bio
with other bios. Otherwise we could merge bios which would otherwise
receive different IO priorities leading to possible QoS issues.

Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220623074840.5960-8-jack@suse.cz
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jan Kara 2022-06-23 09:48:33 +02:00 committed by Jens Axboe
parent 82b74cac28
commit 9c6227e043
1 changed files with 2 additions and 2 deletions
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4
block/blk-mq.c
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@ -2814,6 +2814,8 @@ void blk_mq_submit_bio(struct bio *bio)
if (!bio_integrity_prep(bio))
return;
bio_set_ioprio(bio);
rq = blk_mq_get_cached_request(q, plug, &bio, nr_segs);
if (!rq) {
if (!bio)
@ -2825,8 +2827,6 @@ void blk_mq_submit_bio(struct bio *bio)
trace_block_getrq(bio);
bio_set_ioprio(bio);
rq_qos_track(q, rq, bio);
blk_mq_bio_to_request(rq, bio, nr_segs);