linux-kernel - Re: [2.6.20][PATCH] fix mempolicy error check on a system with memory-less-node

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Message-Id: <200702071232.36689.ak@suse.de>
Date:	Wed, 7 Feb 2007 12:32:36 +0100
From:	Andi Kleen <ak@...e.de>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org, y-goto@...fujitsu.com,
	clameter@...r.sgi.com, akpm@...l.org
Subject: Re: [2.6.20][PATCH] fix mempolicy error check on a system with memory-less-node


> 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.

-Andi
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