lkml.org 
[lkml]   [2013]   [Feb]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH]sched/stop_task: Do not account zero delta_exec in put_prev_task_stop
Date
Hi Kirill,

On Tue, 12 Feb 2013 01:40:04 +0400, Kirill Tkhai wrote:
> Simple return
>
> Signed-off-by: Kirill V Tkhai <tkhai@yandex.ru>
> CC: Steven Rostedt <rostedt@goodmis.org>
> CC: Ingo Molnar <mingo@kernel.org>
> CC: Peter Zijlstra <peterz@infradead.org>
> CC: linux-rt-users <linux-rt-users@vger.kernel.org>
> ---
> 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.

Thanks,
Namhyung

>
> schedstat_set(curr->se.statistics.exec_max,
> max(curr->se.statistics.exec_max, delta_exec));
> --
> To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html


\
 
 \ /
  Last update: 2013-02-13 07:41    [W:0.036 / U:0.616 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site