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Subject[PATCH 0/18] sched: simplified fork, enable load average into LB and power awareness scheduling
This patchset base on tip/sched/core tree temporary, since it is more 
steady than tip/master. and it's easy to rebase on tip/master.

It includes 3 parts changes.

1, simplified fork, patch 1~4, that simplified the fork/exec/wake log in
find_idlest_group and select_task_rq_fair. it can increase 10+%
hackbench process and thread performance on our 4 sockets SNB EP machine.

2, enable load average into LB, patch 5~9, that using load average in
load balancing, with a runnable load value industrialization bug fix and
new fork task load contrib enhancement.

3, power awareness scheduling, patch 10~18,
Defined 2 new power aware policy balance and
powersaving, and then try to spread or shrink tasks on CPU unit
according the different scheduler policy. That can save much power when
task number in system is no more then cpu number.

Any comments are appreciated!

Best regards!

[PATCH 01/18] sched: select_task_rq_fair clean up
[PATCH 02/18] sched: fix find_idlest_group mess logical
[PATCH 03/18] sched: don't need go to smaller sched domain
[PATCH 04/18] sched: remove domain iterations in fork/exec/wake
[PATCH 05/18] sched: load tracking bug fix
[PATCH 06/18] sched: set initial load avg of new forked task as its
[PATCH 07/18] sched: compute runnable load avg in cpu_load and
[PATCH 08/18] sched: consider runnable load average in move_tasks
[PATCH 09/18] Revert "sched: Introduce temporary FAIR_GROUP_SCHED
[PATCH 10/18] sched: add sched_policy in kernel
[PATCH 11/18] sched: add sched_policy and it's sysfs interface
[PATCH 12/18] sched: log the cpu utilization at rq
[PATCH 13/18] sched: add power aware scheduling in fork/exec/wake
[PATCH 14/18] sched: add power/performance balance allowed flag
[PATCH 15/18] sched: don't care if the local group has capacity
[PATCH 16/18] sched: pull all tasks from source group
[PATCH 17/18] sched: power aware load balance,
[PATCH 18/18] sched: lazy powersaving balance

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