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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 /include
parent1e876231785d82443a5ac8b6c660e9f51bc5dede (diff)
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 'include')
-rw-r--r--include/linux/cpuset.h2
-rw-r--r--include/linux/sched.h7
2 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index f20eb8f1602..e9eaec52265 100644
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -146,7 +146,7 @@ static inline void cpuset_cpus_allowed(struct task_struct *p,
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);
}
diff --git a/include/linux/sched.h b/include/linux/sched.h
index dc8871295a5..8da84b7bc1b 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1841,9 +1841,16 @@ static inline void rcu_copy_process(struct task_struct *p)
#endif
#ifdef CONFIG_SMP
+extern void do_set_cpus_allowed(struct task_struct *p,
+ const struct cpumask *new_mask);
+
extern int set_cpus_allowed_ptr(struct task_struct *p,
const struct cpumask *new_mask);
#else
+static inline void do_set_cpus_allowed(struct task_struct *p,
+ const struct cpumask *new_mask)
+{
+}
static inline int set_cpus_allowed_ptr(struct task_struct *p,
const struct cpumask *new_mask)
{