Date: Wed, 7 Feb 2007 21:27:27 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Andi Kleen <ak@suse.de>
Cc: linux-kernel@vger.kernel.org, y-goto@jp.fujitsu.com, clameter@engr.sgi.com,
       akpm@osdl.org
Subject: Re: [2.6.20][PATCH] fix mempolicy error check on a system with
 memory-less-node
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On Wed, 7 Feb 2007 12:32:36 +0100
Andi Kleen <ak@suse.de> wrote:

> 
> > How for_each_online_node(nid) works ? it can handle alias-nid ?
> > 
> > ==
> > 	for_each_online_node(nid) {
> > 		pgdat = NODE_DATA(nid);
> > ==
> > This code never accesses pgdat_for_A twice ?
> 
> It would. If there's a problem it could be changed to walk the pgdat lists instead,
> but at least when x86-64 still did it there wasn't.
> 

Thank you for discussion. 

I'll try another hot-fix just for this NULL pointer access problem,
which is not invasive and not costly.

Thanks,
-Kame


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