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Message-ID: <455B8F3A.6030503@mbligh.org>
Date:	Wed, 15 Nov 2006 14:05:46 -0800
From:	Martin Bligh <mbligh@...igh.org>
To:	Christoph Lameter <clameter@....com>
Cc:	Christian Krafft <krafft@...ibm.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch 2/2] enables booting a NUMA system where some nodes have
 no memory

Christoph Lameter wrote:
> On Wed, 15 Nov 2006, Christian Krafft wrote:
> 
>> When booting a NUMA system with nodes that have no memory (eg by limiting memory),
>> bootmem_alloc_core tried to find pages in an uninitialized bootmem_map.
> 
> Why should we support nodes with no memory? If a node has no memory then 
> its processors and other resources need to be attached to the nearest node 
> with memory.
> 
> AFAICT The primary role of a node is to manage memory.

A node is an arbitrary container object containing one or more of:

CPUs
Memory
IO bus

It does not have to contain memory.

M.
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