Merge "sched: Improve short sleeping tasks detection"

{

	u64 sleep_time = wallclock - p->last_switch_out_ts;

	p->last_wake_ts = wallclock;

	/*

	 * When a short burst and short sleeping task goes for a long

	 * sleep, the task's avg_sleep_time gets boosted. It will not

	 * come below short_sleep threshold for a lot of time and it

	 * results in incorrect packing. The idead behind tracking

	 * avg_sleep_time is to detect if a task is short sleeping

	 * or not. So limit the sleep time to twice the short sleep

	 * threshold. For regular long sleeping tasks, the avg_sleep_time

	 * would be higher than threshold, and packing happens correctly.

	 */

	sleep_time = min_t(u64, sleep_time, 2 * sysctl_sched_short_sleep);

	update_avg(&p->ravg.avg_sleep_time, sleep_time);

	p->last_wake_ts = wallclock;

}

#ifdef CONFIG_CGROUP_SCHED