On Wed, 2013-02-13 at 15:15 +0900, Namhyung Kim wrote:
> ---
> > kernel/sched/stop_task.c | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
> > diff --git a/kernel/sched/stop_task.c b/kernel/sched/stop_task.c
> > index da5eb5b..78d0458 100644
> > --- a/kernel/sched/stop_task.c
> > +++ b/kernel/sched/stop_task.c
> > @@ -58,8 +58,8 @@ static void put_prev_task_stop(struct rq *rq, struct
> > task_struct *prev)
> > u64 delta_exec;
> >
> > delta_exec = rq->clock_task - curr->se.exec_start;
> > - if (unlikely((s64)delta_exec < 0))
> > - delta_exec = 0;
> > + if (unlikely((s64)delta_exec <= 0))
> > + return;
>
> It seems it needs to update curr->se.exec_start then.
>
Ah, if it's less than zero, it does.
A better patch would be:
if (unlikely((s64)delta_exec <= 0)) {
curr->se.exec_start = rq->clock_task;
return;
}
Thanks!
-- Steve
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