diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2011-09-27 12:40:25 (GMT) |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-02-13 22:20:38 (GMT) |
| commit | 5548232be0d297a23436de5de936855316bb02bb (patch) | |
| tree | 9039dafb6c069342d79571cd68c43682f3b443df /kernel/sched | |
| parent | 5b7a2b9962cbbcf841cd11533c2e5010087bc02c (diff) | |
| download | linux-fsl-qoriq-5548232be0d297a23436de5de936855316bb02bb.tar.xz | |
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>
Diffstat (limited to 'kernel/sched')
| -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 2752836..8123f8a 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2404,7 +2404,7 @@ void migrate_disable(void) { struct task_struct *p = current; - if (in_atomic()) { + if (in_atomic() || p->flags & PF_NO_SETAFFINITY) { #ifdef CONFIG_SCHED_DEBUG p->migrate_disable_atomic++; #endif @@ -2434,7 +2434,7 @@ void migrate_enable(void) unsigned long flags; struct rq *rq; - if (in_atomic()) { + if (in_atomic() || p->flags & PF_NO_SETAFFINITY) { #ifdef CONFIG_SCHED_DEBUG p->migrate_disable_atomic--; #endif @@ -2454,26 +2454,21 @@ void migrate_enable(void) preempt_disable(); 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->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->nr_cpus_allowed = cpumask_weight(mask); raw_spin_unlock_irqrestore(&rq->lock, flags); } else p->migrate_disable = 0; |