linux-kernel - Re: [PATCH 17/19] mm: numa: Migrate on reference policy

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Message-ID: <509A4C7C.7020508@redhat.com>
Date:	Wed, 07 Nov 2012 06:56:44 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mgorman@...e.de>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Ingo Molnar <mingo@...nel.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Hugh Dickins <hughd@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 17/19] mm: numa: Migrate on reference policy

On 11/06/2012 04:14 AM, Mel Gorman wrote:
> This is the dumbest possible policy that still does something of note.
> When a pte_numa is faulted, it is moved immediately. Any replacement
> policy must at least do better than this and in all likelihood this
> policy regresses normal workloads.
>
> Signed-off-by: Mel Gorman <mgorman@...e.de>

I expect this code to be replaced with a smarter policy.
However, it may be appropriate to merge this into -mm,
and then have the smarter policy implemented on top.

In case we go that route ...

Acked-by: Rik van Riel <riel@...hat.com>

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