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Date: Thu, 29 May 2014 15:46:49 -0300
From: Marcelo Tosatti <mtosatti@redhat.com>
To: Christoph Lameter <cl@gentwo.org>
Cc: Li Zefan <lizefan@huawei.com>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, Lai Jiangshan <laijs@cn.fujitsu.com>,
        Mel Gorman <mgorman@suse.de>, Tejun Heo <tj@kernel.org>,
        David Rientjes <rientjes@google.com>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] page_alloc: skip cpuset enforcement for lower zone
 allocations (v3)
Message-ID: <20140529184649.GA20609@amt.cnet>
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On Wed, May 28, 2014 at 06:45:04PM -0500, Christoph Lameter wrote:

<snip>

Much cleaner, sent v4 with your suggestions.

> Why call __alloc_pages_nodemask at all if you want to skip the node
> handling? Punt to alloc_pages()

- __alloc_pages_nodemask ignored GFP_DMA32 on older kernels, so the
interface should remain functional.
- There are others callers of alloc_pages(GFP_DMA) that can suffer
from the same problem.
- Mirrors mempolicy behaviour.