2013-11-22 01:00:09 +00:00
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Subject: sched: Do not compare cpu masks in scheduler
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Date: Tue, 27 Sep 2011 08:40:24 -0400
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From: Peter Zijlstra <a.p.zijlstra@chello.nl>
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2014-01-15 02:32:05 +00:00
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/3.12/patches-3.12.6-rt9.tar.xz
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2013-11-22 01:00:09 +00:00
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Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
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Cc: Peter Zijlstra <peterz@infradead.org>
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Cc: Clark Williams <williams@redhat.com>
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Link: http://lkml.kernel.org/r/20110927124423.128129033@goodmis.org
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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kernel/sched/core.c | 14 +++++---------
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1 file changed, 5 insertions(+), 9 deletions(-)
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--- a/kernel/sched/core.c
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+++ b/kernel/sched/core.c
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2013-12-21 01:39:20 +00:00
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@@ -2392,16 +2392,12 @@ static inline void update_migrate_disabl
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2013-11-22 01:00:09 +00:00
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*/
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mask = tsk_cpus_allowed(p);
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- WARN_ON(!cpumask_test_cpu(smp_processor_id(), mask));
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+ if (p->sched_class->set_cpus_allowed)
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+ p->sched_class->set_cpus_allowed(p, mask);
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+ p->nr_cpus_allowed = cpumask_weight(mask);
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- if (!cpumask_equal(&p->cpus_allowed, mask)) {
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- if (p->sched_class->set_cpus_allowed)
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- p->sched_class->set_cpus_allowed(p, mask);
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- p->nr_cpus_allowed = cpumask_weight(mask);
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-
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- /* Let migrate_enable know to fix things back up */
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- p->migrate_disable |= MIGRATE_DISABLE_SET_AFFIN;
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- }
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+ /* Let migrate_enable know to fix things back up */
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+ p->migrate_disable |= MIGRATE_DISABLE_SET_AFFIN;
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}
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void migrate_disable(void)
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