| Subject: sched: Do not compare cpu masks in scheduler |
| Date: Tue, 27 Sep 2011 08:40:24 -0400 |
| From: Peter Zijlstra <a.p.zijlstra@chello.nl> |
| |
| Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> |
| Cc: Peter Zijlstra <peterz@infradead.org> |
| Cc: Clark Williams <williams@redhat.com> |
| Link: http://lkml.kernel.org/r/20110927124423.128129033@goodmis.org |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| |
| --- |
| kernel/sched/core.c | 14 +++++--------- |
| 1 file changed, 5 insertions(+), 9 deletions(-) |
| |
| --- a/kernel/sched/core.c |
| +++ b/kernel/sched/core.c |
| @@ -2876,16 +2876,12 @@ static inline void update_migrate_disabl |
| */ |
| mask = tsk_cpus_allowed(p); |
| |
| - WARN_ON(!cpumask_test_cpu(smp_processor_id(), mask)); |
| + if (p->sched_class->set_cpus_allowed) |
| + p->sched_class->set_cpus_allowed(p, mask); |
| + p->nr_cpus_allowed = cpumask_weight(mask); |
| |
| - if (!cpumask_equal(&p->cpus_allowed, mask)) { |
| - if (p->sched_class->set_cpus_allowed) |
| - p->sched_class->set_cpus_allowed(p, mask); |
| - p->nr_cpus_allowed = cpumask_weight(mask); |
| - |
| - /* Let migrate_enable know to fix things back up */ |
| - p->migrate_disable |= MIGRATE_DISABLE_SET_AFFIN; |
| - } |
| + /* Let migrate_enable know to fix things back up */ |
| + p->migrate_disable |= MIGRATE_DISABLE_SET_AFFIN; |
| } |
| |
| void migrate_disable(void) |