[PATCH 22/23] io-controller: Support per cgroup per device weights and io class

[Rik van Riel]

Vivek Goyal wrote:
> This patch enables per-cgroup per-device weight and ioprio_class handling.
> A new cgroup interface "policy" is introduced. You can make use of this
> file to configure weight and ioprio_class for each device in a given cgroup.
> The original "weight" and "ioprio_class" files are still available. If you
> don't do special configuration for a particular device, "weight" and
> "ioprio_class" are used as default values in this device.

Acked-by: Rik van Riel <riel at redhat.com>