From 372ba8cb46b271a7662b92cbefedee56725f6bd0 Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Wed, 6 Aug 2014 14:19:21 +0100 Subject: cpuidle: menu: Lookup CPU runqueues less The menu governer makes separate lookups of the CPU runqueue to get load and number of IO waiters but it can be done with a single lookup. Signed-off-by: Mel Gorman Signed-off-by: Rafael J. Wysocki --- kernel/sched/core.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'kernel/sched/core.c') diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 3bdf01b494fe..863ef1d19563 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2385,6 +2385,13 @@ unsigned long nr_iowait_cpu(int cpu) return atomic_read(&this->nr_iowait); } +void get_iowait_load(unsigned long *nr_waiters, unsigned long *load) +{ + struct rq *this = this_rq(); + *nr_waiters = atomic_read(&this->nr_iowait); + *load = this->cpu_load[0]; +} + #ifdef CONFIG_SMP /* -- cgit v1.2.3