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Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull scheduler fixes from Ingo Molnar:
 "An RT group-scheduling fix and the sched-domains topology setup fix
  from Mel"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/rt: Fix rq's cpupri leak while enqueue/dequeue child RT entities
  sched: Assign correct scheduling domain to 'sd_llc'
This commit is contained in:
Linus Torvalds 2013-12-19 09:11:22 -08:00
commit f7556698a3
2 changed files with 17 additions and 2 deletions
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5
kernel/sched/core.c
View File

@ -4902,6 +4902,7 @@ DEFINE_PER_CPU(struct sched_domain *, sd_asym);
static void update_top_cache_domain(int cpu)
{
struct sched_domain *sd;
struct sched_domain *busy_sd = NULL;
int id = cpu;
int size = 1;
@ -4909,9 +4910,9 @@ static void update_top_cache_domain(int cpu)
if (sd) {
id = cpumask_first(sched_domain_span(sd));
size = cpumask_weight(sched_domain_span(sd));
sd = sd->parent; /* sd_busy */
busy_sd = sd->parent; /* sd_busy */
}
rcu_assign_pointer(per_cpu(sd_busy, cpu), sd);
rcu_assign_pointer(per_cpu(sd_busy, cpu), busy_sd);
rcu_assign_pointer(per_cpu(sd_llc, cpu), sd);
per_cpu(sd_llc_size, cpu) = size;

14
kernel/sched/rt.c
View File

@ -901,6 +901,13 @@ inc_rt_prio_smp(struct rt_rq *rt_rq, int prio, int prev_prio)
{
struct rq *rq = rq_of_rt_rq(rt_rq);
#ifdef CONFIG_RT_GROUP_SCHED
/*
* Change rq's cpupri only if rt_rq is the top queue.
*/
if (&rq->rt != rt_rq)
return;
#endif
if (rq->online && prio < prev_prio)
cpupri_set(&rq->rd->cpupri, rq->cpu, prio);
}
@ -910,6 +917,13 @@ dec_rt_prio_smp(struct rt_rq *rt_rq, int prio, int prev_prio)
{
struct rq *rq = rq_of_rt_rq(rt_rq);
#ifdef CONFIG_RT_GROUP_SCHED
/*
* Change rq's cpupri only if rt_rq is the top queue.
*/
if (&rq->rt != rt_rq)
return;
#endif
if (rq->online && rt_rq->highest_prio.curr != prev_prio)
cpupri_set(&rq->rd->cpupri, rq->cpu, rt_rq->highest_prio.curr);
}