block: make block cgroup policies follow bio task association

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Implement bio_blkio_cgroup() which returns the blkcg associated with
the bio if exists or %current's blkcg, and use it in blk-throttle and
cfq-iosched propio.  This makes both cgroup policies honor task
association for the bio instead of always assuming %current.

As nobody is using bio_set_task() yet, this doesn't introduce any
behavior change.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Tejun Heo 2012-03-05 13:15:28 -08:00 • committed by Jens Axboe

parent 852c788f83

commit 4f85cb96d9

4 changed files with 23 additions and 15 deletions

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11

block/blk-cgroup.c

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4

block/blk-cgroup.h

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2

block/blk-throttle.c

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21

block/cfq-iosched.c

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