blk-throttle: add .low interface

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Add low limit for cgroup and corresponding cgroup interface. To be
consistent with memcg, we allow users configure .low limit higher than
.max limit. But the internal logic always assumes .low limit is lower
than .max limit. So we add extra bps/iops_conf fields in throtl_grp for
userspace configuration. Old bps/iops fields in throtl_grp will be the
actual limit we use for throttling.

Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

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Shaohua Li 2017-03-27 10:51:32 -07:00 • committed by Jens Axboe

parent 327ffb9b37

commit cd5ab1b0fc

1 changed files with 116 additions and 28 deletions

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block/blk-throttle.c

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