Commit-ID: 6c3b4d44ba2838f00614a5a2d777d4401e0bfd71
Gitweb: http://git.kernel.org/tip/6c3b4d44ba2838f00614a5a2d777d4401e0bfd71
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate: Fri, 17 Jan 2014 15:09:39 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Mon, 10 Feb 2014 16:17:22 +0100
sched: Clean up idle task SMP logic
The idle post_schedule flag is just a vile waste of time, furthermore
it appears unneeded, move the idle_enter_fair() call into
pick_next_task_idle().
Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Cc: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
Cc: alex.shi@xxxxxxxxxx
Cc: mingo@xxxxxxxxxx
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-aljykihtxJt3mkokxi0qZurb@xxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/sched/idle_task.c | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
diff --git a/kernel/sched/idle_task.c b/kernel/sched/idle_task.c
index e5c922a..721371b 100644
--- a/kernel/sched/idle_task.c
+++ b/kernel/sched/idle_task.c
@@ -19,11 +19,6 @@ static void pre_schedule_idle(struct rq *rq, struct task_struct *prev)
idle_exit_fair(rq);
rq_last_tick_reset(rq);
}
-
-static void post_schedule_idle(struct rq *rq)
-{
- idle_enter_fair(rq);
-}
#endif /* CONFIG_SMP */
/*
* Idle tasks are unconditionally rescheduled:
@@ -41,8 +36,7 @@ pick_next_task_idle(struct rq *rq, struct task_struct *prev)
schedstat_inc(rq, sched_goidle);
#ifdef CONFIG_SMP
- /* Trigger the post schedule to do an idle_enter for CFS */
- rq->post_schedule = 1;
+ idle_enter_fair(rq);
#endif
return rq->idle;
}
@@ -106,7 +100,6 @@ const struct sched_class idle_sched_class = {
#ifdef CONFIG_SMP
.select_task_rq = select_task_rq_idle,
.pre_schedule = pre_schedule_idle,
- .post_schedule = post_schedule_idle,
#endif
.set_curr_task = set_curr_task_idle,
--
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