On Thu, 2013-01-24 at 11:06 +0800, Alex Shi wrote: > 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....@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));
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