From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Clark Williams <williams@redhat.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: [PATCH 2/3][RT] sched: Do not compare cpu masks in scheduler
Date: Mon, 26 Sep 2011 11:08:37 -0400 [thread overview]
Message-ID: <20110926150946.844914281@goodmis.org> (raw)
In-Reply-To: 20110926150835.107371360@goodmis.org
[-- Attachment #1: peterz-migrate-disable-no-cpu-compare.patch --]
[-- Type: text/plain, Size: 960 bytes --]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Index: linux-rt.git/kernel/sched.c
===================================================================
--- linux-rt.git.orig/kernel/sched.c
+++ linux-rt.git/kernel/sched.c
@@ -4235,16 +4235,12 @@ 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->rt.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->rt.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)
next prev parent reply other threads:[~2011-09-26 15:10 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-26 15:08 [PATCH 0/3][RT] rt: patches to postpone migrate disable Steven Rostedt
2011-09-26 15:08 ` [PATCH 1/3][RT] sched: Postpone actual migration disalbe to schedule Steven Rostedt
2011-09-26 15:08 ` Steven Rostedt [this message]
2011-09-26 15:26 ` [PATCH 2/3][RT] sched: Do not compare cpu masks in scheduler Steven Rostedt
2011-09-26 15:08 ` [PATCH 3/3][RT] sched: Have migrate_disable ignore bounded threads Steven Rostedt
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