linux-kernel - Re: [PATCH 02/11] PCI: Try to allocate mem64 above 4G at first

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Message-ID: <CA+55aFzd1BWqidt95qZLc1x_YU=WeGS=mKUOMvO_3omOhc_5VA@mail.gmail.com>
Date:	Wed, 23 May 2012 08:57:41 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/11] PCI: Try to allocate mem64 above 4G at first

On Tue, May 22, 2012 at 11:34 PM, Yinghai Lu <yinghai@...nel.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
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