Commit 6c3b4d44 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar

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: default avatarPeter Zijlstra <peterz@infradead.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: alex.shi@linaro.org
Cc: mingo@kernel.org
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/n/tip-aljykihtxJt3mkokxi0qZurb@git.kernel.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 678d5718
...@@ -19,11 +19,6 @@ static void pre_schedule_idle(struct rq *rq, struct task_struct *prev) ...@@ -19,11 +19,6 @@ static void pre_schedule_idle(struct rq *rq, struct task_struct *prev)
idle_exit_fair(rq); idle_exit_fair(rq);
rq_last_tick_reset(rq); rq_last_tick_reset(rq);
} }
static void post_schedule_idle(struct rq *rq)
{
idle_enter_fair(rq);
}
#endif /* CONFIG_SMP */ #endif /* CONFIG_SMP */
/* /*
* Idle tasks are unconditionally rescheduled: * Idle tasks are unconditionally rescheduled:
...@@ -41,8 +36,7 @@ pick_next_task_idle(struct rq *rq, struct task_struct *prev) ...@@ -41,8 +36,7 @@ pick_next_task_idle(struct rq *rq, struct task_struct *prev)
schedstat_inc(rq, sched_goidle); schedstat_inc(rq, sched_goidle);
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
/* Trigger the post schedule to do an idle_enter for CFS */ idle_enter_fair(rq);
rq->post_schedule = 1;
#endif #endif
return rq->idle; return rq->idle;
} }
...@@ -106,7 +100,6 @@ const struct sched_class idle_sched_class = { ...@@ -106,7 +100,6 @@ const struct sched_class idle_sched_class = {
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
.select_task_rq = select_task_rq_idle, .select_task_rq = select_task_rq_idle,
.pre_schedule = pre_schedule_idle, .pre_schedule = pre_schedule_idle,
.post_schedule = post_schedule_idle,
#endif #endif
.set_curr_task = set_curr_task_idle, .set_curr_task = set_curr_task_idle,
......
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