sched: prepare for cmwq, take#2

Hello,

This is the second take of repare-for-cmwq patchset.  Changes from the
first take[L] are

* consult-online-mask-instead-of-active-in-select_fallback_rq and
  implement-__set_cpus_allowed replaced by updates to when cpu_active
  and cpuset configuration are updated as suggested by Peter.

* Patch description updated in 0004 as suggested by Peter.

 0001-sched-define-and-use-CPU_PRI_-enums-for-cpu-notifier.patch
 0002-sched-adjust-when-cpu_active-and-cpuset-configuratio.patch
 0003-sched-refactor-try_to_wake_up.patch
 0004-sched-add-hooks-for-workqueue.patch

This patchset is available in the following git tree.

 git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git sched-wq

and contains the following changes.

 include/linux/cpu.h        |   25 ++++++
 include/linux/perf_event.h |    2 
 include/linux/sched.h      |    1 
 kernel/cpu.c               |    6 -
 kernel/cpuset.c            |   46 +++++++-----
 kernel/fork.c              |    2 
 kernel/sched.c             |  169 ++++++++++++++++++++++++++++++++++-----------
 kernel/workqueue_sched.h   |   16 ++++
 8 files changed, 203 insertions(+), 64 deletions(-)

Thanks.

--
tejun

[L] http://thread.gmane.org/gmane.linux.kernel/984967
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