blk-cgroup: allow controllers to output their own stats

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blk-iolatency has a few stats that it would like to print out, and
instead of adding a bunch of crap to the generic code just provide a
helper so that controllers can add stuff to the stat line if they want
to.

Hide it behind a boot option since it changes the output of io.stat from
normal, and these stats are only interesting to developers.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Josef Bacik 2018-07-03 11:14:52 -04:00 • committed by Jens Axboe

parent c7c98fd376

commit 903d23f0a3

2 changed files with 47 additions and 3 deletions

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47

block/blk-cgroup.c

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3

include/linux/blk-cgroup.h

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