idle_balance() should disregard cpus disabled by the power scheduler.
This is a quick fix. idle_balance() should be revisit to implement proper handling of cpus with cpu_power=1.
Signed-off-by: Morten Rasmussen morten.rasmussen@arm.com CC: Ingo Molnar mingo@kernel.org CC: Peter Zijlstra peterz@infradead.org CC: Catalin Marinas catalin.marinas@arm.com --- kernel/sched/fair.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 4610463..a59617b 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -5261,6 +5261,10 @@ void idle_balance(int this_cpu, struct rq *this_rq) if (this_rq->avg_idle < sysctl_sched_migration_cost) return;
+ /* Don't pull tasks if disable by power scheduler */ + if (!power_cpu_balance(this_cpu)) + return; + /* * Drop the rq->lock, but keep IRQ/preempt disabled. */