linux-kernel - Re: [RFC PATCH 00/20] Cleanup and optimise the page allocator

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Message-ID: <20090223174947.GT26292@one.firstfloor.org>
Date:	Mon, 23 Feb 2009 18:49:48 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Mel Gorman <mel@....ul.ie>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Linux Memory Management List <linux-mm@...ck.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Rik van Riel <riel@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Nick Piggin <npiggin@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Lin Ming <ming.m.lin@...el.com>,
	Zhang Yanmin <yanmin_zhang@...ux.intel.com>
Subject: Re: [RFC PATCH 00/20] Cleanup and optimise the page allocator

> hmm, it would be ideal but I haven't looked too closely at how it could
> be implemented. I thought first you could just associate a zonelist with

Yes like that. This was actually discussed during the initial cpuset
implementation. I thought back then it would be better to do it
elsewhere, but changed my mind later when I saw the impact on the
fast path.

> the cpuset but you'd need one for each node allowed by the cpuset so it
> could get quite large. Then again, it might be worthwhile if cpusets

Yes you would need one per node, but that's not a big problem because
systems with lots of nodes are also expected to have lots of memory.
Most systems have a very small number of nodes.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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