linux-kernel - Re: [PATCH 2/4] sched,numa: weigh nearby nodes for task placement on complex NUMA topologies

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Message-ID: <20140509101317.GU30445@twins.programming.kicks-ass.net>
Date:	Fri, 9 May 2014 12:13:17 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	riel@...hat.com
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org, mgorman@...e.de,
	chegu_vinod@...com
Subject: Re: [PATCH 2/4] sched,numa: weigh nearby nodes for task placement on
 complex NUMA topologies

On Thu, May 08, 2014 at 01:23:29PM -0400, riel@...hat.com wrote:
> This patch does nothing on machines with simple NUMA topologies.

Was this:

> +	/*
> +	 * No need to calculate a score if the system has a simple NUMA
> +	 * topology, with no node distances between "local" and "far away".
> +	 */
> +	if (max_distance == LOCAL_DISTANCE)
> +		return 0;

Supposed to make that true?

It doesn't. That test is a !numa test, not a fully connected test.

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