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Revert "sched/fair: ensure utilization signals are synchronized before use"

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This reverts commit 83f462daa3.

Change-Id: I37ba36da61df2beb3a005557d9b673027f446916
Signed-off-by: Brendan Jackman <brendan.jackman@arm.com>
This commit is contained in:
Brendan Jackman 2017-06-29 17:24:29 +01:00 • committed by Chris Redpath
parent ebc28671a5
commit e76348ec5f
1 changed files with 2 additions and 9 deletions
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11
kernel/sched/fair.c
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@ -6573,16 +6573,9 @@ select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag, int wake_f
int want_affine = 0;
int sync = wake_flags & WF_SYNC;
if (sd_flag & SD_BALANCE_WAKE) {
/*
* do wake_cap unconditionally as it causes task and cpu
* utilization to be synced, and we need that for energy
* aware wakeups
*/
int _wake_cap = wake_cap(p, cpu, prev_cpu);
want_affine = !wake_wide(p) && !_wake_cap
if (sd_flag & SD_BALANCE_WAKE)
want_affine = !wake_wide(p) && !wake_cap(p, cpu, prev_cpu)
&& cpumask_test_cpu(cpu, tsk_cpus_allowed(p));
}
if (energy_aware() && !(cpu_rq(prev_cpu)->rd->overutilized))
return select_energy_cpu_brute(p, prev_cpu, sync);