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authorMorten Rasmussen <morten.rasmussen@arm.com>2012-10-12 15:25:02 +0100
committerViresh Kumar <viresh.kumar@linaro.org>2013-01-04 12:26:06 +0530
commit7cfce78c54b34669e7c993196f9c2fe7a0748559 (patch)
treeed883a084ce5845ec102ab90fd449b94351813a6
parentdd93dfca40f125f7c3a0bd6326024ae523da7ad8 (diff)
downloadvexpress-lsk-7cfce78c54b34669e7c993196f9c2fe7a0748559.tar.gz
sched: Only down migrate low priority tasks if allowed by affinity mask
Adds an extra check intersection of the task affinity mask and the slower hmp_domain cpumask before down migrating low priority tasks. Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com>
-rw-r--r--kernel/sched/fair.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index c0873204958..3a87577a795 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5895,8 +5895,11 @@ static unsigned int hmp_down_migration(int cpu, struct sched_entity *se)
#ifdef CONFIG_SCHED_HMP_PRIO_FILTER
/* Filter by task priority */
- if (p->prio >= hmp_up_prio)
+ if ((p->prio >= hmp_up_prio) &&
+ cpumask_intersects(&hmp_slower_domain(cpu)->cpus,
+ tsk_cpus_allowed(p))) {
return 1;
+ }
#endif
/* Let the task load settle before doing another down migration */