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authorDietmar Eggemann <dietmar.eggemann@arm.com>2015-01-28 16:57:06 +0000
committerRobin Randhawa <robin.randhawa@arm.com>2015-04-09 12:26:14 +0100
commitc40def01b8951335927c4d7b7f4c4ff744cc36e9 (patch)
tree140ac88f33e1b76927f43a836c3eec01063daae9
parent15bd117fcd2010c62a5865215e38d36036dc1ac5 (diff)
downloadkernel-c40def01b8951335927c4d7b7f4c4ff744cc36e9.tar.gz
sched: Infrastructure to query if load balancing is energy-aware
Energy-aware load balancing should only happen if the ENERGY_AWARE feature is turned on and the sched domain on which the load balancing is performed on contains energy data. There is also a need during a load balance action to be able to query if we should continue to load balance energy-aware or if we reached the tipping point which forces us to fall back to the conventional load balancing functionality. cc: Ingo Molnar <mingo@redhat.com> cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
-rw-r--r--kernel/sched/fair.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index a76777fa6079..f49a4cb35e57 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5510,6 +5510,8 @@ struct lb_env {
unsigned int loop;
unsigned int loop_break;
unsigned int loop_max;
+
+ bool use_ea;
};
/*
@@ -6828,6 +6830,7 @@ static int load_balance(int this_cpu, struct rq *this_rq,
.idle = idle,
.loop_break = sched_nr_migrate_break,
.cpus = cpus,
+ .use_ea = (energy_aware() && sd->groups->sge) ? true : false,
};
/*