linux-kernel - Re: [PATCH 9/7] sched,numa: remove task_h_load from task_numa

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Message-ID: <20140625050735.GB28774@twins.programming.kicks-ass.net>
Date:	Wed, 25 Jun 2014 07:07:35 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Rik van Riel <riel@...hat.com>
Cc:	linux-kernel@...r.kernel.org, chegu_vinod@...com,
	peterz@...radead.com, mgorman@...e.de, mingo@...nel.org
Subject: Re: [PATCH 9/7] sched,numa: remove task_h_load from task_numa_compare

On Tue, Jun 24, 2014 at 03:14:54PM -0400, Rik van Riel wrote:
> The function effective_load already makes the calculations that
> task_h_load makes. Making them twice can throw off the calculations,
> and is generally a bad idea.
> 
> Signed-off-by: Rik van Riel <riel@...hat.com>
> ---
>  kernel/sched/fair.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 1aaa3b4..318a275 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -1227,7 +1227,7 @@ static void task_numa_compare(struct task_numa_env *env,
>  	dst_load = env->dst_stats.load;
>  
>  	/* Calculate the effect of moving env->p from src to dst. */
> -	load = task_h_load(env->p);
> +	load = env->p->se.load.weight;
>  	tg = task_group(env->p);
>  	src_load += effective_load(tg, env->src_cpu, -load, -load);
>  	dst_load += effective_load(tg, env->dst_cpu, load, load);
> @@ -1251,7 +1251,7 @@ static void task_numa_compare(struct task_numa_env *env,
>  
>  	if (cur) {
>  		/* Cur moves in the opposite direction. */
> -		load = task_h_load(cur);
> +		load = cur->se.load.weight;
>  		tg = task_group(cur);
>  		src_load += effective_load(tg, env->src_cpu, load, load);
>  		dst_load += effective_load(tg, env->dst_cpu, -load, -load);

Shall I merge this into patch 3?

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