From mboxrd@z Thu Jan  1 00:00:00 1970
From: Johannes Weiner <hannes@cmpxchg.org>
Date: Thu, 30 Jul 2015 17:41:12 +0000
Subject: Re: [PATCH v3 3/3] mm: use numa_mem_id() in alloc_pages_node()
Message-Id: <20150730174112.GC15257@cmpxchg.org>
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To: Vlastimil Babka <vbabka@suse.cz>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org, Mel Gorman <mgorman@suse.de>, David Rientjes <rientjes@google.com>, Greg Thelen <gthelen@google.com>, "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>, Christoph Lameter <cl@linux.com>, Pekka Enberg <penberg@kernel.org>, Joonsoo Kim <iamjoonsoo.kim@lge.com>, Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, cbe-oss-dev@lists.ozlabs.org, kvm@vger.kernel.org, Mel Gorman <mgorman@techsingularity.net>

On Thu, Jul 30, 2015 at 06:34:31PM +0200, Vlastimil Babka wrote:
> numa_mem_id() is able to handle allocation from CPUs on memory-less nodes,
> so it's a more robust fallback than the currently used numa_node_id().

Won't it fall through to the next closest memory node in the zonelist
anyway? Is this for callers doing NUMA_NO_NODE with __GFP_THISZONE?