block: make blkcg aware of kthread stored original cgroup info

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bio_blkcg is the only API to get cgroup info for a bio right now. If
bio_blkcg finds current task is a kthread and has original blkcg
associated, it will use the css instead of associating the bio to
current task. This makes it possible that kthread dispatches bios on
behalf of other threads.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Shaohua Li 2017-09-14 14:02:06 -07:00 • committed by Jens Axboe

parent af551fb3be

commit 902ec5b6de

1 changed files with 7 additions and 6 deletions

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include/linux/blk-cgroup.h

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