[patch v5 01/15] sched: set initial value for runnable avg of sched entities.

Alex Shi
2013-02-18T05:11:45Z

We need initialize the se.avg.{decay_count, load_avg_contrib} to zero
after a new task forked.
Otherwise random values of above variables cause mess when do new task
enqueue:
enqueue_task_fair
enqueue_entity
enqueue_entity_load_avg

Signed-off-by: Alex Shi <alex.shi@intel.com>
---
kernel/sched/core.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 26058d0..1743746 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1559,6 +1559,8 @@ static void __sched_fork(struct task_struct *p)
#if defined(CONFIG_SMP) && defined(CONFIG_FAIR_GROUP_SCHED)
p->se.avg.runnable_avg_period = 0;
p->se.avg.runnable_avg_sum = 0;
+ p->se.avg.decay_count = 0;
+ p->se.avg.load_avg_contrib = 0;
#endif
#ifdef CONFIG_SCHEDSTATS
memset(&p->se.statistics, 0, sizeof(p->se.statistics));
--
1.7.12