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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Wed, 23 May 2012 08:57:41 -0700
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Subject: Re: [PATCH 02/11] PCI: Try to allocate mem64 above 4G at first
To: Yinghai Lu <yinghai@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
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On Tue, May 22, 2012 at 11:34 PM, Yinghai Lu <yinghai@kernel.org> wrote:
> and will fall back to below 4g if it can not find any above 4g.

Has this been tested on 32-bit machines without PAE? There might be
things that just happen to work because their allocations were always
done bottom-up.

Or do we have something else that protects us from the "oops, we can't
actually *map* those pages"?

                       Linus