linux-kernel - Re: [RFC] [PATCH] more support for memory-less-node.

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Message-Id: <20070214092010.07ecc734.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Wed, 14 Feb 2007 09:20:10 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Christoph Lameter <clameter@....com>
Cc:	mbligh@...igh.org, ak@...e.de, linux-kernel@...r.kernel.org,
	akpm@...l.org, bob.picco@...com
Subject: Re: [RFC] [PATCH] more support for memory-less-node.

On Tue, 13 Feb 2007 10:50:53 -0800 (PST)
Christoph Lameter <clameter@....com> wrote:

> On Tue, 13 Feb 2007, Martin J. Bligh wrote:
> 
> > What's wrong with just setting the existing counters like
> > node_spanned_pages / node_present_pages to zero?
> 
> Will this fix the breakage that Kame-san saw?
> 

Now, memory-less-node's presetn_pages and spanned_pages are zero.
and zone's present_pages is  zero, too.

We added populated_zone(zone) macro. This can check a zone has pages or not.
(see build_zonelist in page_alloc.c)

-Kame

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