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Date: Sun, 14 Sep 2008 23:09:20 -0700
From: Jeremy Fitzhardinge <jeremy@goop.org>
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To: roberto@unbit.it
CC: Ingo Molnar <mingo@elte.hu>, jeremy@xensource.com,
       linux-kernel@vger.kernel.org, Mirko Iannella <mirko@unbit.it>,
       Alex Nixon <alex.nixon@citrix.com>
Subject: Re: [PATCH] xen: Fix for xen guest with mem > 3.7G
References: <1221333418.6036.9.camel@sirius> <48CC2C12.4080302@goop.org>	 <20080914132104.GB32106@elte.hu>  <48CD22CF.9030900@goop.org> <1221428593.6036.15.camel@sirius>
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Roberto De Ioris wrote:
> In this way you pass a 64bit integer to the function, but max_pfn in
> origin is still 32bit.
>
> max_pfn need to be 64bit to supporto more than 4GB
>   

No, a 32-bit pfn (page frame number) is sufficient for 2^44 bytes of
memory.  Does this patch work for you?

    J