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Gmane
From: Li Zefan <lizefan-hv44wF8Li93QT0dZR+AlfA <at> public.gmane.org>
Subject: [PATCH 00/11] cpuset: separate configured masks and effective masks
Newsgroups: gmane.linux.kernel
Date: Wednesday 21st August 2013 09:58:42 UTC (over 3 years ago)
This patcheset introduces behavior changes, but only if you mount cgroupfs
with sane_behavior option:

- We introduce new interfaces cpuset.effective_cpus and
cpuset.effective_mems,
  while cpuset.cpus and cpuset.mems will be configured masks.

- The configured masks can be changed by writing cpuset.cpus/mems only.
They
  won't be changed when hotplug happens.

- Users can config cpus and mems without restrictions from the parent
cpuset.
  effective masks will enforce the hierarchical behavior.

- Users can also config cpus and mems to have already offlined CPU/nodes.

- When a CPU/node is onlined, it will be brought back to the effective
masks
  if it's in the configured masks.

- We build sched domains based on effective cpumask but not configured
cpumask.

Li Zefan (11):
  cgroup: allow subsystems to create files for sane_behavior only
  cpuset: add cs->real_cpus_allowed and cs->real_mems_allowed
  cpuset: update cpuset->real_{cpus,mems}_allowed at hotplug
  cpuset: update cs->real_{cpus,mems}_allowed when config changes
  cpuset: inherite ancestor's masks if real_{cpus,mems}_allowed become
empty
  cpuset: apply cs->real_{cpus,mems}_allowed
  cpuset: use effective cpumask to build sched domains
  cpuset: separate configured masks and efffective masks
  cpuset: enable onlined cpu/node in effective masks
  cpuset: allow writing offlined masks to cpuset.cpus/mems
  cpuset: export effective masks to userspace

 include/linux/cgroup.h |   1 +
 kernel/cgroup.c        |   2 +
 kernel/cpuset.c        | 466
++++++++++++++++++++++++++++---------------------
 3 files changed, 271 insertions(+), 198 deletions(-)

-- 
1.8.0.2
 
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