[Eas-dev] [PATCH RFC 2/8] sched/fair: select idle CPU for waken up task

Prefer to select idle CPU to place waken up task. So we can see the task can be more stable to spread to CPUs in the cluster and hope can decrease OPP for power saving.

Signed-off-by: Leo Yan leo.yan@linaro.org --- kernel/sched/fair.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index c4bc7ae..7bd1c5b 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -5617,7 +5617,7 @@ static int energy_aware_wake_cpu(struct task_struct *p, int target)

if (new_util < capacity_curr_of(i)) { target_cpu = i; - if (cpu_rq(i)->nr_running) + if (!cpu_rq(i)->nr_running) break; }

-- 1.9.1