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sched: RT-balance, replace hooks with pre/post schedule and wakeup methods

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To make the main sched.c code more agnostic to the schedule classes.
Instead of having specific hooks in the schedule code for the RT class
balancing. They are replaced with a pre_schedule, post_schedule
and task_wake_up methods. These methods may be used by any of the classes
but currently, only the sched_rt class implements them.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Steven Rostedt
2008-01-25 21:08:22 +01:00
committed by Ingo Molnar
parent 4bf0b77158
commit 9a897c5a67
3 changed files with 26 additions and 14 deletions
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20
kernel/sched.c
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@@ -1625,7 +1625,10 @@ out_activate:
out_running:
p->state = TASK_RUNNING;
wakeup_balance_rt(rq, p);
#ifdef CONFIG_SMP
if (p->sched_class->task_wake_up)
p->sched_class->task_wake_up(rq, p);
#endif
out:
task_rq_unlock(rq, &flags);
@@ -1748,7 +1751,10 @@ void fastcall wake_up_new_task(struct task_struct *p, unsigned long clone_flags)
inc_nr_running(p, rq);
}
check_preempt_curr(rq, p);
wakeup_balance_rt(rq, p);
#ifdef CONFIG_SMP
if (p->sched_class->task_wake_up)
p->sched_class->task_wake_up(rq, p);
#endif
task_rq_unlock(rq, &flags);
}
@@ -1869,7 +1875,10 @@ static void finish_task_switch(struct rq *rq, struct task_struct *prev)
prev_state = prev->state;
finish_arch_switch(prev);
finish_lock_switch(rq, prev);
schedule_tail_balance_rt(rq);
#ifdef CONFIG_SMP
if (current->sched_class->post_schedule)
current->sched_class->post_schedule(rq);
#endif
fire_sched_in_preempt_notifiers(current);
if (mm)
@@ -3638,7 +3647,10 @@ need_resched_nonpreemptible:
switch_count = &prev->nvcsw;
}
schedule_balance_rt(rq, prev);
#ifdef CONFIG_SMP
if (prev->sched_class->pre_schedule)
prev->sched_class->pre_schedule(rq, prev);
#endif
if (unlikely(!rq->nr_running))
idle_balance(cpu, rq);