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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2008-01-25 23:08:28 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-25 23:08:28 +0300 |
| commit | 02b67cc3ba36bdba351d6c3a00593f4ec550d9d3 (patch) | |
| tree | 5185ad2d780974dc864f12d81d6c8b9fec73097b /kernel | |
| parent | 03319ec8b06849051747a17aa2a0f9aba9277980 (diff) | |
| download | linux-02b67cc3ba36bdba351d6c3a00593f4ec550d9d3.tar.xz | |
sched: do not do cond_resched() when CONFIG_PREEMPT
Why do we even have cond_resched when real preemption
is on? It seems to be a waste of space and time.
remove cond_resched with CONFIG_PREEMPT on.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index b9ee0f4db66a..6ee37602a6d8 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -4678,7 +4678,8 @@ static void __cond_resched(void) } while (need_resched()); } -int __sched cond_resched(void) +#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PREEMPT_VOLUNTARY) +int __sched _cond_resched(void) { if (need_resched() && !(preempt_count() & PREEMPT_ACTIVE) && system_state == SYSTEM_RUNNING) { @@ -4687,7 +4688,8 @@ int __sched cond_resched(void) } return 0; } -EXPORT_SYMBOL(cond_resched); +EXPORT_SYMBOL(_cond_resched); +#endif /* * cond_resched_lock() - if a reschedule is pending, drop the given lock, |