From 606dba2e289446600a0b68422ed2019af5355c12 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Sat, 11 Feb 2012 06:05:00 +0100 Subject: sched: Push put_prev_task() into pick_next_task() In order to avoid having to do put/set on a whole cgroup hierarchy when we context switch, push the put into pick_next_task() so that both operations are in the same function. Further changes then allow us to possibly optimize away redundant work. Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1328936700.2476.17.camel@laptop Signed-off-by: Ingo Molnar --- kernel/sched/idle_task.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'kernel/sched/idle_task.c') diff --git a/kernel/sched/idle_task.c b/kernel/sched/idle_task.c index 516c3d9ceea1..e5c922ac40ce 100644 --- a/kernel/sched/idle_task.c +++ b/kernel/sched/idle_task.c @@ -33,8 +33,12 @@ static void check_preempt_curr_idle(struct rq *rq, struct task_struct *p, int fl resched_task(rq->idle); } -static struct task_struct *pick_next_task_idle(struct rq *rq) +static struct task_struct * +pick_next_task_idle(struct rq *rq, struct task_struct *prev) { + if (prev) + prev->sched_class->put_prev_task(rq, prev); + schedstat_inc(rq, sched_goidle); #ifdef CONFIG_SMP /* Trigger the post schedule to do an idle_enter for CFS */ -- cgit