linux-kernel - Re: x86_64: Make sparsemem/vmemmap the default memory model

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Date:	Tue, 13 Nov 2007 00:59:34 +0100
From:	Andi Kleen <ak@...e.de>
To:	Christoph Lameter <clameter@....com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Mel Gorman <mel@....ul.ie>, Andy Whitcroft <apw@...dowen.org>
Subject: Re: x86_64: Make sparsemem/vmemmap the default memory model

On Tuesday 13 November 2007 00:52:14 Christoph Lameter wrote:
> Use sparsemem as the only memory model for UP, SMP and NUMA.
> 
> Measurements indicate that DISCONTIGMEM has a higher
> overhead than sparsemem. And FLATMEMs benefits are minimal. So I think its
> best to simply standardize on sparsemem.

How about the memory overhead? Is it the same too?
And code size vs flatmem?

-Andi
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