linux-kernel - Re: [PATCH 09/13] sched: Favour moving tasks towards nodes that incurred more faults

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Message-ID: <20130703182748.GA18898@dyad.programming.kicks-ass.net>
Date:	Wed, 3 Jul 2013 20:27:48 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 09/13] sched: Favour moving tasks towards nodes that
 incurred more faults

On Wed, Jul 03, 2013 at 03:21:36PM +0100, Mel Gorman wrote:
>  static bool migrate_improves_locality(struct task_struct *p, struct lb_env *env)
>  {

> +	if (p->numa_faults[task_faults_idx(dst_nid, 1)] >
> +	    p->numa_faults[task_faults_idx(src_nid, 1)])
> +		return true;

> +}

> +static bool migrate_degrades_locality(struct task_struct *p, struct lb_env *env)
> +{

> +	if (p->numa_faults[src_nid] > p->numa_faults[dst_nid])
>  		return true;

I bet you wanted to use task_faults_idx() there too ;-)


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