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Date: Wed, 19 Feb 2014 14:04:37 -0800 (PST)
From: David Rientjes <rientjes@google.com>
To: Christoph Lameter <cl@linux.com>
Subject: Re: [RFC PATCH 2/3] topology: support node_numa_mem() for determining
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Cc: Han Pingtian <hanpt@linux.vnet.ibm.com>,
 Nishanth Aravamudan <nacc@linux.vnet.ibm.com>,
 Pekka Enberg <penberg@kernel.org>,
 Linux Memory Management List <linux-mm@kvack.org>,
 Paul Mackerras <paulus@samba.org>, Anton Blanchard <anton@samba.org>,
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On Tue, 18 Feb 2014, Christoph Lameter wrote:

> Its an optimization to avoid calling the page allocator to figure out if
> there is memory available on a particular node.
> 

Thus this patch breaks with memory hot-add for a memoryless node.