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>
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index f20eb8f..e9eaec5 100644
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -146,7 +146,7 @@
static inline int cpuset_cpus_allowed_fallback(struct task_struct *p)
{
- cpumask_copy(&p->cpus_allowed, cpu_possible_mask);
+ do_set_cpus_allowed(p, cpu_possible_mask);
return cpumask_any(cpu_active_mask);
}