The load and the util of idle cpus must be updated periodically in order to decay the blocked part.
If CONFIG_FAIR_GROUP_SCHED is not set, the load and util of idle cpus are not decayed and stay at the values set before becoming idle. Signed-off-by: Vincent Guittot <vincent.guit...@linaro.org> Reviewed-by: Yuyang Du <yuyang...@intel.com> --- kernel/sched/fair.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 452c932..3e9bccf 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -5877,6 +5877,16 @@ static unsigned long task_h_load(struct task_struct *p) #else static inline void update_blocked_averages(int cpu) { + struct rq *rq = cpu_rq(cpu); + struct cfs_rq *cfs_rq = &rq->cfs; + unsigned long flags; + + raw_spin_lock_irqsave(&rq->lock, flags); + update_rq_clock(rq); + + update_cfs_rq_load_avg(cfs_rq_clock_task(cfs_rq), cfs_rq); + + raw_spin_unlock_irqrestore(&rq->lock, flags); } static unsigned long task_h_load(struct task_struct *p) -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/