lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

sched: Push put_prev_task() into pick_next_task()

Browse Source 
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 <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1328936700.2476.17.camel@laptop
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra
2012-02-11 06:05:00 +01:00
committed by Ingo Molnar
parent fed14d45f9
commit 606dba2e28
7 changed files with 55 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
kernel/sched/idle_task.c
View File

@@ -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 */