| From | Morten Rasmussen <> | Subject | [RFCv3 PATCH 41/48] sched: Introduce energy awareness into find_busiest_group | Date | Wed, 4 Feb 2015 18:31:18 +0000 |
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From: Dietmar Eggemann <dietmar.eggemann@arm.com>
In case that after the gathering of sched domain statistics the current load balancing operation is still in energy-aware mode, just return the least efficient (costliest) reference. That implies the system is considered to be balanced in case no least efficient sched group was found.
cc: Ingo Molnar <mingo@redhat.com> cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com> --- kernel/sched/fair.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 36f3c77..199ffff 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -7133,6 +7133,9 @@ static struct sched_group *find_busiest_group(struct lb_env *env) local = &sds.local_stat; busiest = &sds.busiest_stat; + if (env->use_ea) + return sds.costliest; + /* ASYM feature bypasses nice load balance check */ if ((env->idle == CPU_IDLE || env->idle == CPU_NEWLY_IDLE) && check_asym_packing(env, &sds)) -- 1.9.1
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