On 06/21/2013 10:50 AM, Lei Wen wrote:
> I see your point... I made the mistake that update the wrong patch...
> Please help check this one.
>
> commit 5fc3d5c74f8359ef382d9a20ffe657ffc237c109
> Author: Lei Wen <lei...@marvell.com>
> Date: Thu Jun 20 10:43:59 2013 +0800
>
> sched: fix potential twice decay issue
>
> Signed-off-by: Lei Wen <lei...@marvell.com>
>
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index c61a614..9640c66 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -5856,7 +5856,8 @@ static void switched_from_fair(struct rq *rq,
> struct task_struct *p)
> */
> if (p->se.avg.decay_count) {
> struct cfs_rq *cfs_rq = cfs_rq_of(&p->se);
> - __synchronize_entity_decay(&p->se);
> + p->se.avg.last_runnable_update +=
> + __synchronize_entity_decay(&p->se);
it is not needed, since the last_runnable_update will be reset if it
will be switched to fair.
--
Thanks
Alex
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