From: Dietmar Eggemann <dietmar.eggem...@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 <mi...@redhat.com>
cc: Peter Zijlstra <pet...@infradead.org>
Signed-off-by: Dietmar Eggemann <dietmar.eggem...@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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