linux-kernel - Re: [RFC PATCH 11/11] sched/fair: Refactor select_task_rq

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Message-ID: <20160616015759.GP8105@intel.com>
Date:	Thu, 16 Jun 2016 09:57:59 +0800
From:	Yuyang Du <yuyang.du@...el.com>
To:	peterz@...radead.org, mingo@...nel.org,
	linux-kernel@...r.kernel.org
Cc:	umgwanakikbuti@...il.com, bsegall@...gle.com, pjt@...gle.com,
	morten.rasmussen@....com, vincent.guittot@...aro.org,
	dietmar.eggemann@....com, matt@...eblueprint.co.uk
Subject: Re: [RFC PATCH 11/11] sched/fair: Refactor select_task_rq_fair()

On Thu, Jun 16, 2016 at 09:49:35AM +0800, Yuyang Du wrote:
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index f15461f..1ab41b8 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -4986,12 +4986,14 @@ static void record_wakee(struct task_struct *p)
>  	 */
>  	if (time_after(jiffies, current->wakee_flip_decay_ts + HZ)) {
>  		current->wakee_flips >>= 1;
> +		current->wakee_count >>= 1;
>  		current->wakee_flip_decay_ts = jiffies;
>  	}
>  
>  	if (current->last_wakee != p) {
>  		current->last_wakee = p;
>  		current->wakee_flips++;
>  	}

So sorry that:

		current->wakee_count++;

should be moved out of the if statement.