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sched: Clean up SCHED_RESET_ON_FORK 

Make SCHED_RESET_ON_FORK sched_fork() bits a self-contained unlikely code path.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Acked-by: Lennart Poettering <mzxreary@0pointer.de>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <1245228361.18329.6.camel@marge.simson.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Mike Galbraith 2009-06-17 10:46:01 +02:00 committed by Ingo Molnar
parent ca94c44253
commit b9dc29e72f
1 changed files with 18 additions and 16 deletions
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34
kernel/sched.c
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@ -2613,28 +2613,30 @@ void sched_fork(struct task_struct *p, int clone_flags)
set_task_cpu(p, cpu);
/*
* Revert to default priority/policy on fork if requested. Make sure we
* do not leak PI boosting priority to the child.
* Make sure we do not leak PI boosting priority to the child.
*/
if (current->sched_reset_on_fork &&
(p->policy == SCHED_FIFO || p->policy == SCHED_RR))
p->policy = SCHED_NORMAL;
p->prio = current->normal_prio;
if (current->sched_reset_on_fork &&
(current->normal_prio < DEFAULT_PRIO))
p->prio = DEFAULT_PRIO;
else
p->prio = current->normal_prio;
/*
* Revert to default priority/policy on fork if requested.
*/
if (unlikely(p->sched_reset_on_fork)) {
if (p->policy == SCHED_FIFO || p->policy == SCHED_RR)
p->policy = SCHED_NORMAL;
if (p->normal_prio < DEFAULT_PRIO)
p->prio = DEFAULT_PRIO;
/*
* We don't need the reset flag anymore after the fork. It has
* fulfilled its duty:
*/
p->sched_reset_on_fork = 0;
}
if (!rt_prio(p->prio))
p->sched_class = &fair_sched_class;
/*
* We don't need the reset flag anymore after the fork. It has
* fulfilled its duty:
*/
p->sched_reset_on_fork = 0;
#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
if (likely(sched_info_on()))
memset(&p->sched_info, 0, sizeof(p->sched_info));