[PATCH v3 0/6] correct load_balance()

[Joonsoo Kim]

Commit 88b8dac0 makes load_balance() consider other cpus in its group.
But, there are some missing parts for this feature to work properly.
This patchset correct these things and make load_balance() robust.

Others are related to LBF_ALL_PINNED. This is fallback functionality
when all tasks can't be moved as cpu affinity. But, currently,
if imbalance is not large enough to task's load, we leave LBF_ALL_PINNED
flag and 'redo' is triggered. This is not our intention, so correct it.

These are based on sched/core branch in tip tree.

Changelog
v2->v3: Changes from Peter's suggestion
 [2/6]: change comment
 [3/6]: fix coding style
 [6/6]: fix coding style, fix changelog

v1->v2: Changes from Peter's suggestion
 [4/6]: don't include a code to evaluate load value in can_migrate_task()
 [5/6]: rename load_balance_tmpmask to load_balance_mask
 [6/6]: not use one more cpumasks, use env's cpus for prevent to re-select

Joonsoo Kim (6):
  sched: change position of resched_cpu() in load_balance()
  sched: explicitly cpu_idle_type checking in rebalance_domains()
  sched: don't consider other cpus in our group in case of NEWLY_IDLE
  sched: move up affinity check to mitigate useless redoing overhead
  sched: rename load_balance_tmpmask to load_balance_mask
  sched: prevent to re-select dst-cpu in load_balance()

 kernel/sched/core.c |    4 +--
 kernel/sched/fair.c |   69 +++++++++++++++++++++++++++++----------------------
 2 files changed, 41 insertions(+), 32 deletions(-)

-- 
1.7.9.5

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