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Date: Wed, 24 Jan 2024 13:35:56 +0800 From: Hongyu Jin <hongyu.jin.cn@...il.com> To: agk@...hat.com, snitzer@...nel.org, mpatocka@...hat.com, axboe@...nel.dk, ebiggers@...nel.org Cc: zhiguo.niu@...soc.com, ke.wang@...soc.com, yibin.ding@...soc.com, hongyu.jin@...soc.com, linux-kernel@...r.kernel.org, dm-devel@...ts.linux.dev, linux-block@...r.kernel.org Subject: [PATCH v8 5/5] dm-crypt: Fix lost ioprio when queuing write bios From: Hongyu Jin <hongyu.jin@...soc.com> Since dm-crypt queues writes to a different kernel thread (workqueue), the bios will dispatch from tasks with different io_context->ioprio settings and blkcg than the submitting task, thus giving incorrect ioprio to the io scheduler. Get the original io priority setting via struct dm_crypt_io::base_bio and set this priority to the bio for write. Link: https://lore.kernel.org/dm-devel/alpine.LRH.2.11.1612141049250.13402@mail.ewheeler.net Signed-off-by: Hongyu Jin <hongyu.jin@...soc.com> --- drivers/md/dm-crypt.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 855b482cbff1..e0804a86946f 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -1683,6 +1683,7 @@ static struct bio *crypt_alloc_buffer(struct dm_crypt_io *io, unsigned int size) GFP_NOIO, &cc->bs); clone->bi_private = io; clone->bi_end_io = crypt_endio; + clone->bi_ioprio = io->base_bio->bi_ioprio; remaining_size = size; -- 2.34.1
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