sched/fair: Get rid of scaling utilization by capacity_orig

done:

	return target;

}

/*

 * cpu_util returns the amount of capacity of a CPU that is used by CFS

 * tasks. The unit of the return value must be the one of capacity so we can

 * compare the utilization with the capacity of the CPU that is available for

 * CFS task (ie cpu_capacity).

 * cfs.avg.util_avg is the sum of running time of runnable tasks on a

 * CPU. It represents the amount of utilization of a CPU in the range

 * [0..SCHED_LOAD_SCALE]. The utilization of a CPU can't be higher than the

 * full capacity of the CPU because it's about the running time on this CPU.

 * Nevertheless, cfs.avg.util_avg can be higher than SCHED_LOAD_SCALE

 * because of unfortunate rounding in util_avg or just

 * after migrating tasks until the average stabilizes with the new running

 * time. So we need to check that the utilization stays into the range

 * [0..cpu_capacity_orig] and cap if necessary.

 * Without capping the utilization, a group could be seen as overloaded (CPU0

 * utilization at 121% + CPU1 utilization at 80%) whereas CPU1 has 20% of

 * available capacity.

 *

 * cfs_rq.avg.util_avg is the sum of running time of runnable tasks plus the

 * recent utilization of currently non-runnable tasks on a CPU. It represents

 * the amount of utilization of a CPU in the range [0..capacity_orig] where

 * capacity_orig is the cpu_capacity available at the highest frequency

 * (arch_scale_freq_capacity()).

 * The utilization of a CPU converges towards a sum equal to or less than the

 * current capacity (capacity_curr <= capacity_orig) of the CPU because it is

 * the running time on this CPU scaled by capacity_curr.

 *

 * Nevertheless, cfs_rq.avg.util_avg can be higher than capacity_curr or even

 * higher than capacity_orig because of unfortunate rounding in

 * cfs.avg.util_avg or just after migrating tasks and new task wakeups until

 * the average stabilizes with the new running time. We need to check that the

 * utilization stays within the range of [0..capacity_orig] and cap it if

 * necessary. Without utilization capping, a group could be seen as overloaded

 * (CPU0 utilization at 121% + CPU1 utilization at 80%) whereas CPU1 has 20% of

 * available capacity. We allow utilization to overshoot capacity_curr (but not

 * capacity_orig) as it useful for predicting the capacity required after task

 * migrations (scheduler-driven DVFS).

 */

static int cpu_util(int cpu)

{

	unsigned long util = cpu_rq(cpu)->cfs.avg.util_avg;

	unsigned long capacity = capacity_orig_of(cpu);

	if (util >= SCHED_LOAD_SCALE)

		return capacity;

	return (util * capacity) >> SCHED_LOAD_SHIFT;

	return (util >= capacity) ? capacity : util;

}

/*