[PATCHSET REPOST for-4.15] cgroup, sched: cgroup2 interface for CPU controller (on basic acct)

[Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

Hello,

(Rebased on cgroup/for-4.15, no real changes.  Once acked, I think
 it'd be easiest to route these through the cgroup branch;
 alternatively, we can pull cgroup/for-4.15 to a sched branch and
 apply these there.)

These are two patches to implement the cgroup2 CPU controller
interface.  Changes from the last revision[L].

* Updated on top of the cgroup2 basic resource accounting patchset[B]
  and now uses cgroup2's CPU accounting instead of cpuacct as stat
  source.

* cpuacct is no longer necessary and not converted.

This patchset contains the following two patches.

 0001-sched-Misc-preps-for-cgroup-unified-hierarchy-interf.patch
 0002-sched-Implement-interface-for-cgroup-unified-hierarc.patch

It's on top of the cgroup2 basic resource accounting patchset, which
has been merged to cgroup/for-4.15, and available in the following git
branch.

 git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-cgroup2-cpu-on-basic-acct

diffstat follows.  Thanks.

 Documentation/cgroup-v2.txt |   36 ++------
 kernel/sched/core.c         |  179 +++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 187 insertions(+), 28 deletions(-)

--
tejun

[L] http://lkml.kernel.org/r/20170720184808.1433868-1-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org
[B] http://lkml.kernel.org/r/20170811163754.3939102-1-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org