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Merge branch 'sched-fixes-for-linus' of git://tesla.tglx.de/git/linux-2.6-tip 

* 'sched-fixes-for-linus' of git://tesla.tglx.de/git/linux-2.6-tip:
  sched: Fix a memory leak in __sdt_free()
  sched: Move blk_schedule_flush_plug() out of __schedule()
  sched: Separate the scheduler entry for preemption
This commit is contained in:
Linus Torvalds 2011-09-07 13:01:34 -07:00
parent b0fb422281 feff8fa007
commit e81b693c01
1 changed files with 26 additions and 15 deletions
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41
kernel/sched.c
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@ -4279,9 +4279,9 @@ pick_next_task(struct rq *rq)
}
/*
* schedule() is the main scheduler function.
* __schedule() is the main scheduler function.
*/
asmlinkage void __sched schedule(void)
static void __sched __schedule(void)
{
struct task_struct *prev, *next;
unsigned long *switch_count;
@ -4322,16 +4322,6 @@ need_resched:
if (to_wakeup)
try_to_wake_up_local(to_wakeup);
}
/*
* If we are going to sleep and we have plugged IO
* queued, make sure to submit it to avoid deadlocks.
*/
if (blk_needs_flush_plug(prev)) {
raw_spin_unlock(&rq->lock);
blk_schedule_flush_plug(prev);
raw_spin_lock(&rq->lock);
}
}
switch_count = &prev->nvcsw;
}
@ -4369,6 +4359,26 @@ need_resched:
if (need_resched())
goto need_resched;
}
static inline void sched_submit_work(struct task_struct *tsk)
{
if (!tsk->state)
return;
/*
* If we are going to sleep and we have plugged IO queued,
* make sure to submit it to avoid deadlocks.
*/
if (blk_needs_flush_plug(tsk))
blk_schedule_flush_plug(tsk);
}
asmlinkage void schedule(void)
{
struct task_struct *tsk = current;
sched_submit_work(tsk);
__schedule();
}
EXPORT_SYMBOL(schedule);
#ifdef CONFIG_MUTEX_SPIN_ON_OWNER
@ -4435,7 +4445,7 @@ asmlinkage void __sched notrace preempt_schedule(void)
do {
add_preempt_count_notrace(PREEMPT_ACTIVE);
schedule();
__schedule();
sub_preempt_count_notrace(PREEMPT_ACTIVE);
/*
@ -4463,7 +4473,7 @@ asmlinkage void __sched preempt_schedule_irq(void)
do {
add_preempt_count(PREEMPT_ACTIVE);
local_irq_enable();
schedule();
__schedule();
local_irq_disable();
sub_preempt_count(PREEMPT_ACTIVE);
@ -5588,7 +5598,7 @@ static inline int should_resched(void)
static void __cond_resched(void)
{
add_preempt_count(PREEMPT_ACTIVE);
schedule();
__schedule();
sub_preempt_count(PREEMPT_ACTIVE);
}
@ -7443,6 +7453,7 @@ static void __sdt_free(const struct cpumask *cpu_map)
struct sched_domain *sd = *per_cpu_ptr(sdd->sd, j);
if (sd && (sd->flags & SD_OVERLAP))
free_sched_groups(sd->groups, 0);
kfree(*per_cpu_ptr(sdd->sd, j));
kfree(*per_cpu_ptr(sdd->sg, j));
kfree(*per_cpu_ptr(sdd->sgp, j));
}