Date: Tue, 22 May 2007 09:58:36 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: ak@suse.de, dada1@cosmosbay.com, wli@holomorphy.com, npiggin@suse.de,
       linux-kernel@vger.kernel.org, linux-mm@kvack.org,
       linux-arch@vger.kernel.org
Subject: Re: [rfc] increase struct page size?!
Message-Id: <20070522095836.c01263ba.kamezawa.hiroyu@jp.fujitsu.com>
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On Mon, 21 May 2007 17:38:58 -0700 (PDT)
Christoph Lameter <clameter@sgi.com> wrote:

> On Tue, 22 May 2007, KAMEZAWA Hiroyuki wrote:
> 
> > For i386(32bit arch), there is not enough space for vmemmap.
> 
> I thought 32 bit would use flatmem? Is memory really sparse on 32 
> bit? Likely difficult due to lack of address space?
> 

Of course, i386 can use flatmem.

I am just afraid that memory hotplug is just for sprasemem.
But I also think we can add memory-hotplug for flatmem if necessary.
(I myself have no plan now. I wonder memory power-save-mode may be supported
 by chipsets.)

-Kame

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