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| author | KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> | 2011-05-19 15:08:58 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-05-28 17:02:57 +0200 |
| commit | 1e1b6c511d1b23cb7c3b619d82fc7bd9f620565d (patch) | |
| tree | c50e88412c8b42264177dc125f74a30f9c7a82d9 /include | |
| parent | 1e876231785d82443a5ac8b6c660e9f51bc5dede (diff) | |
| download | linux-1e1b6c511d1b23cb7c3b619d82fc7bd9f620565d.tar.gz linux-1e1b6c511d1b23cb7c3b619d82fc7bd9f620565d.tar.bz2 linux-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 'include')
| -rw-r--r-- | include/linux/cpuset.h | 2 | ||||
| -rw-r--r-- | include/linux/sched.h | 7 |
2 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h index f20eb8f16025..e9eaec522655 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 dc8871295a5a..8da84b7bc1b8 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) { |