linux-kernel - Re: [PATCH 5/6] sched/dl: reschedule if successfully pull earlier deadline task

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Message-ID: <54517143.6010801@gmail.com>
Date:	Thu, 30 Oct 2014 06:59:15 +0800
From:	Wanpeng Li <kernellwp@...il.com>
To:	Juri Lelli <juri.lelli@....com>
CC:	Wanpeng Li <wanpeng.li@...ux.intel.com>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/6] sched/dl: reschedule if successfully pull earlier
 deadline task

Hi Juri, could you review 5/6 and 6/6? 5/6 is the same behavior as rt 
class. ;-)
2014/10/27 9:41, Wanpeng Li:
> Reschedule if successfully pull earlier deadline task.
>
> Signed-off-by: Wanpeng Li <wanpeng.li@...ux.intel.com>
> ---
>   kernel/sched/deadline.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
> index 97141e2..21de865 100644
> --- a/kernel/sched/deadline.c
> +++ b/kernel/sched/deadline.c
> @@ -1583,8 +1583,8 @@ static void switched_from_dl(struct rq *rq, struct task_struct *p)
>   	 * this is the right place to try to pull some other one
>   	 * from an overloaded cpu, if any.
>   	 */
> -	if (!rq->dl.dl_nr_running)
> -		pull_dl_task(rq);
> +	if (!rq->dl.dl_nr_running && pull_dl_task(rq))
> +			resched_curr(rq);
>   #endif
>   }
>   

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