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Commit 5d8d4081 authored by Hongyu Jin's avatar Hongyu Jin Committed by Mike Snitzer
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dm crypt: Fix IO priority lost when queuing write bios

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 in the bio for write.

Link: https://lore.kernel.org/dm-devel/alpine.LRH.2.11.1612141049250.13402@mail.ewheeler.net



Signed-off-by: default avatarHongyu Jin <hongyu.jin@unisoc.com>
Reviewed-by: default avatarEric Biggers <ebiggers@google.com>
Reviewed-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarMike Snitzer <snitzer@kernel.org>
parent d95e2c34
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