diff options
| author | Mike Galbraith <efault@gmx.de> | 2011-08-23 16:12:43 +0200 |
|---|---|---|
| committer | Clark Williams <williams@redhat.com> | 2012-04-13 11:01:37 -0500 |
| commit | b05c1e0ee4f76e63a2849e6ffead83ff8198f478 (patch) | |
| tree | 5bc1cc710f533bc646fc7bc7fd194d24b8cf5635 /kernel | |
| parent | 4812930123eb0ec91387118e10c4b682d446f92e (diff) | |
sched, rt: Fix migrate_enable() thinko
Assigning mask = tsk_cpus_allowed(p) after p->migrate_disable = 0 ensures
that we won't see a mask change.. no push/pull, we stack tasks on one CPU.
Also add a couple fields to sched_debug for the next guy.
[ Build fix from Stratos Psomadakis <psomas@gentoo.org> ]
Signed-off-by: Mike Galbraith <efault@gmx.de>
Cc: Paul E. McKenney <paulmck@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1314108763.6689.4.camel@marge.simson.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/core.c | 4 | ||||
| -rw-r--r-- | kernel/sched/debug.c | 7 |
2 files changed, 10 insertions, 1 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 9e138b76d22d..37930b725229 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5128,12 +5128,14 @@ void migrate_enable(void) */ rq = this_rq(); raw_spin_lock_irqsave(&rq->lock, flags); - p->migrate_disable = 0; mask = tsk_cpus_allowed(p); + p->migrate_disable = 0; WARN_ON(!cpumask_test_cpu(smp_processor_id(), mask)); if (!cpumask_equal(&p->cpus_allowed, mask)) { + /* Get the mask now that migration is enabled */ + mask = tsk_cpus_allowed(p); if (p->sched_class->set_cpus_allowed) p->sched_class->set_cpus_allowed(p, mask); p->rt.nr_cpus_allowed = cpumask_weight(mask); diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c index 09acaa15161d..451512ff5f30 100644 --- a/kernel/sched/debug.c +++ b/kernel/sched/debug.c @@ -237,6 +237,9 @@ void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq) P(rt_throttled); PN(rt_time); PN(rt_runtime); +#ifdef CONFIG_SMP + P(rt_nr_migratory); +#endif #undef PN #undef P @@ -485,6 +488,10 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m) P(se.load.weight); P(policy); P(prio); +#ifdef CONFIG_PREEMPT_RT_FULL + P(migrate_disable); +#endif + P(rt.nr_cpus_allowed); #undef PN #undef __PN #undef P |