linux-kernel - Re: [PATCH 00/18] Make common x86 arch area for i386 and x86_64

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Message-ID: <Pine.LNX.4.64.0703161354520.6204@schroedinger.engr.sgi.com>
Date:	Fri, 16 Mar 2007 13:56:13 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	David Miller <davem@...emloft.net>
cc:	mbligh@...igh.org, andi@...stfloor.org, rostedt@...dmis.org,
	torvalds@...ux-foundation.org, mingo@...e.hu,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	chrisw@...s-sol.org, rusty@...tcorp.com.au, glommer@...il.com,
	apw@...dowen.org
Subject: Re: [PATCH 00/18] Make common x86 arch area for i386 and x86_64 -
 Take 2

On Fri, 16 Mar 2007, David Miller wrote:

> From: Christoph Lameter <clameter@....com>
> Date: Fri, 16 Mar 2007 13:48:58 -0700 (PDT)
> 
> > Please read my posts to linux-mm on that subject. We discussed it last 
> > year in detail and the agreement was that the sparsemem crud needs to be 
> > taken out. Kame-san posted patches to do that.
> 
> Please don't do that, sparsemem works very well on sparc64 and I
> like the flexibility it gives me.

I am not sure what flexibility you are talking about? The modification are 
to make sparsemem support virtual memmap as one option. See Kame-san's 
posts. There is no regression here its just cutting out the overhead of 
sparsmem from within.

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