scheduler fixes

GIT PULL Ingo Molnar 1 participant 1 message May 10, 2016 Scheduler

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Ingo Molnar

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2016-05-10 12:00 UTC #0 lore raw

Linus,

Please pull the latest sched-urgent-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched-urgent-for-linus

# HEAD: 13b5ab02ae118fc8dfdc2b8597688ec4a11d5b53 sched/rt, sched/dl: Don't push if task's scheduling class was changed

A UP kernel cpufreq fix and a rt/dl scheduler corner case fix.

Thanks,

Ingo

------------------>
Rafael J. Wysocki (1):
sched/fair: Fix !CONFIG_SMP kernel cpufreq governor breakage

Xunlei Pang (1):
sched/rt, sched/dl: Don't push if task's scheduling class was changed

 kernel/sched/deadline.c | 1 +
 kernel/sched/fair.c     | 9 ++++++++-
 kernel/sched/rt.c       | 1 +
 3 files changed, 10 insertions(+), 1 deletion(-)

kernel/sched/deadline.c +1 -0

index affd97ec9f65..686ec8adf952 100644
@@ -1394,6 +1394,7 @@ static struct rq *find_lock_later_rq(struct task_struct *task, struct rq *rq)
 				     !cpumask_test_cpu(later_rq->cpu,
 				                       &task->cpus_allowed) ||
 				     task_running(rq, task) ||
+				     !dl_task(task) ||
 				     !task_on_rq_queued(task))) {
 				double_unlock_balance(rq, later_rq);
 				later_rq = NULL;

kernel/sched/fair.c +8 -1

index 0fe30e66aff1..40748dc8ea3e 100644
@@ -3030,7 +3030,14 @@ static int idle_balance(struct rq *this_rq);
 
 #else /* CONFIG_SMP */
 
-static inline void update_load_avg(struct sched_entity *se, int update_tg) {}
+static inline void update_load_avg(struct sched_entity *se, int not_used)
+{
+	struct cfs_rq *cfs_rq = cfs_rq_of(se);
+	struct rq *rq = rq_of(cfs_rq);
+
+	cpufreq_trigger_update(rq_clock(rq));
+}
+
 static inline void
 enqueue_entity_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se) {}
 static inline void

kernel/sched/rt.c +1 -0

index c41ea7ac1764..ec4f538d4396 100644
@@ -1729,6 +1729,7 @@ static struct rq *find_lock_lowest_rq(struct task_struct *task, struct rq *rq)
 				     !cpumask_test_cpu(lowest_rq->cpu,
 						       tsk_cpus_allowed(task)) ||
 				     task_running(rq, task) ||
+				     !rt_task(task) ||
 				     !task_on_rq_queued(task))) {
 
 				double_unlock_balance(rq, lowest_rq);