diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2011-09-27 08:40:25 -0400 |
|---|---|---|
| committer | Clark Williams <williams@redhat.com> | 2012-04-13 11:01:38 -0500 |
| commit | 23cb1bfa1357dd7f808d7f84a4f9d833bc468369 (patch) | |
| tree | 8d4875bb74fb4cb0a323cb8b4f77b6b42ec707a5 | |
| parent | ff62eb8c393ad4184e7f7cda3bc4fe54f076f80c (diff) | |
sched: Have migrate_disable ignore bounded threads
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/20110927124423.567944215@goodmis.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | kernel/sched/core.c | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 380db9e7f0eb..b740265465f8 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3176,7 +3176,7 @@ void migrate_disable(void) { struct task_struct *p = current; - if (in_atomic()) { + if (in_atomic() || p->flags & PF_THREAD_BOUND) { #ifdef CONFIG_SCHED_DEBUG p->migrate_disable_atomic++; #endif @@ -3207,7 +3207,7 @@ void migrate_enable(void) unsigned long flags; struct rq *rq; - if (in_atomic()) { + if (in_atomic() || p->flags & PF_THREAD_BOUND) { #ifdef CONFIG_SCHED_DEBUG p->migrate_disable_atomic--; #endif @@ -3228,26 +3228,21 @@ void migrate_enable(void) if (unlikely(migrate_disabled_updated(p))) { /* - * See comment in update_migrate_disable() about locking. + * Undo whatever update_migrate_disable() did, also see there + * about locking. */ rq = this_rq(); raw_spin_lock_irqsave(&rq->lock, flags); - mask = tsk_cpus_allowed(p); + /* * Clearing migrate_disable causes tsk_cpus_allowed to * show the tasks original cpu affinity. */ p->migrate_disable = 0; - - WARN_ON(!cpumask_test_cpu(smp_processor_id(), mask)); - - if (unlikely(!cpumask_equal(&p->cpus_allowed, mask))) { - /* Get the mask now that migration is enabled */ - mask = tsk_cpus_allowed(p); - if (p->sched_class->set_cpus_allowed) - p->sched_class->set_cpus_allowed(p, mask); - p->rt.nr_cpus_allowed = cpumask_weight(mask); - } + mask = tsk_cpus_allowed(p); + if (p->sched_class->set_cpus_allowed) + p->sched_class->set_cpus_allowed(p, mask); + p->rt.nr_cpus_allowed = cpumask_weight(mask); raw_spin_unlock_irqrestore(&rq->lock, flags); } else p->migrate_disable = 0; |