On Thu, Jun 23, 2022 at 09:48:34AM +0200, Jan Kara wrote:

Currently, IO priority set in task's IO context is not reflected in the
bio->bi_ioprio for most IO (only io_uring and direct IO set it). This
results in odd results where process is submitting some bios with one
priority and other bios with a different (unset) priority and due to
differing priorities bios cannot be merged. Make sure bio->bi_ioprio is
always set on bio submission.

Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>