sched: change cpu_avg_load_per_task using h_nr_running

Date	Sun, 18 Aug 2013 16:25:16 +0800

Since cpu_avg_load_per_task is used only by cfs scheduler, its meaning
should present the average cfs type task load in the current run queue.
Thus we change it to h_nr_running for well presenting its meaning.

Signed-off-by: Lei Wen <leiwen@marvell.com>
Signed-off-by: Paul Reioux <reioux@gmail.com>
sched: change pick_next_task_fair to h_nr_running

Date	Sun, 18 Aug 2013 16:25:18 +0800

Since pick_next_task_fair only want to ensure there is some task in the
run queue to be picked up, it should use the h_nr_running instead of
nr_running, since nr_running cannot present all tasks if group existed.

Signed-off-by: Lei Wen <leiwen@marvell.com>
Signed-off-by: Paul Reioux <reioux@gmail.com>
sched: change update_sg_lb_stats to h_nr_running

Date    Sun, 18 Aug 2013 16:25:19 +0800

Since update_sg_lb_stats is used to calculate sched_group load
difference of cfs type task, it should use h_nr_running instead of
nr_running of rq.
Signed-off-by: Lei Wen <leiwen@marvell.com>
bacported to Linux 3.4 by faux123

Signed-off-by: Paul Reioux <reioux@gmail.com>
sched: change find_busiest_queue to h_nr_running

Date    Sun, 18 Aug 2013 16:25:20 +0800

Since find_busiest_queue try to avoid do load balance for runqueue
which has only one cfs task and its load is above the imbalance
value calculated, we should use h_nr_running of cfs instead of
nr_running of rq.

Signed-off-by: Lei Wen <leiwen@marvell.com>
Signed-off-by: Paul Reioux <reioux@gmail.com>
sched: change active_load_balance_cpu_stop to use h_nr_running

Date	Sun, 18 Aug 2013 16:25:21 +0800

We should only avoid do the active load balance when there is no
cfs type task. If just use rq->nr_running, it is possible for the
source cpu has multiple rt task, while zero cfs task, so that it
would confuse the active load balance function that try to move,
but find no task it could move.

Signed-off-by: Lei Wen <leiwen@marvell.com>
Signed-off-by: Paul Reioux <reioux@gmail.com>