From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: Design question for PV superpage support
Date: Mon, 02 Mar 2009 17:32:38 -0800
Message-ID: <49AC88B6.4020607@goop.org>
References: <200903020754.23534.dcm@mccr.org>
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To: Dave McCracken <dcm@mccr.org>
Cc: Xen Developers List <xen-devel@lists.xensource.com>, Mick.Jordan@sun.com
List-Id: xen-devel@lists.xenproject.org

Dave McCracken wrote:
> No, actually, it doesn't do that.  The hypervisor allocates 2M pages, then 
> expands them into 4K pages for the mfn<->pfn maps, etc.
>   

What happens if you start using MMU_MACHPHYS_UPDATE on pages which are 
part of a 2M mapping?

    J