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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2011-05-19 15:08:58 +0900
committerIngo Molnar <mingo@elte.hu>2011-05-28 17:02:57 +0200
commit1e1b6c511d1b23cb7c3b619d82fc7bd9f620565d (patch)
treec50e88412c8b42264177dc125f74a30f9c7a82d9 /kernel/cpuset.c
parent1e876231785d82443a5ac8b6c660e9f51bc5dede (diff)
downloadlwn-1e1b6c511d1b23cb7c3b619d82fc7bd9f620565d.tar.gz
lwn-1e1b6c511d1b23cb7c3b619d82fc7bd9f620565d.zip
cpuset: Fix cpuset_cpus_allowed_fallback(), don't update tsk->rt.nr_cpus_allowed
The rule is, we have to update tsk->rt.nr_cpus_allowed if we change tsk->cpus_allowed. Otherwise RT scheduler may confuse. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/4DD4B3FA.5060901@jp.fujitsu.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/cpuset.c')
-rw-r--r--kernel/cpuset.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 1ceeb049c827..9c9b7545c810 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -2190,7 +2190,7 @@ int cpuset_cpus_allowed_fallback(struct task_struct *tsk)
rcu_read_lock();
cs = task_cs(tsk);
if (cs)
- cpumask_copy(&tsk->cpus_allowed, cs->cpus_allowed);
+ do_set_cpus_allowed(tsk, cs->cpus_allowed);
rcu_read_unlock();
/*
@@ -2217,7 +2217,7 @@ int cpuset_cpus_allowed_fallback(struct task_struct *tsk)
* Like above we can temporary set any mask and rely on
* set_cpus_allowed_ptr() as synchronization point.
*/
- cpumask_copy(&tsk->cpus_allowed, cpu_possible_mask);
+ do_set_cpus_allowed(tsk, cpu_possible_mask);
cpu = cpumask_any(cpu_active_mask);
}