diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2011-06-07 11:25:03 +0200 |
|---|---|---|
| committer | Clark Williams <williams@redhat.com> | 2012-02-15 10:32:47 -0600 |
| commit | cc5869844e7f739cc249718e1b32143bea277f6c (patch) | |
| tree | 096dec020b02745a72a484e4e920140451a7e324 /kernel | |
| parent | f586b3a229ecc5ca53cc08c08038a5f0b5df0277 (diff) | |
sched-cond-resched.patch
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index aa3cc029db77..42d00037dde6 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -5775,9 +5775,17 @@ static inline int should_resched(void) static void __cond_resched(void) { - add_preempt_count(PREEMPT_ACTIVE); - __schedule(); - sub_preempt_count(PREEMPT_ACTIVE); + do { + add_preempt_count(PREEMPT_ACTIVE); + __schedule(); + sub_preempt_count(PREEMPT_ACTIVE); + /* + * Check again in case we missed a preemption + * opportunity between schedule and now. + */ + barrier(); + + } while (need_resched()); } int __sched _cond_resched(void) |