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Re: [Xen-devel] [PATCH] Paravirt framebuffer frontend kernel support [1/

To: Steven Smith <sos22-xen@xxxxxxxxxxxxx>, Jeremy Katz <katzj@xxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] Paravirt framebuffer frontend kernel support [1/5]
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Wed, 06 Sep 2006 16:56:14 +0100
Cc: aliguori <aliguori@xxxxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, sos22@xxxxxxxxxxxxx, Markus Armbruster <armbru@xxxxxxxxxx>
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On 6/9/06 10:11 am, "Steven Smith" <sos22-xen@xxxxxxxxxxxxx> wrote:

>> I wouldn't complain if we go the route Keir suggested and have Xen do
>> it ;-)  But if not, I think that given the size of the memory in
>> question + grant tables, the quick hack is probably going to be the
>> "right" thing for this case.
> Okay.  Adding translations to the hypervisor isn't going to happen
> until after 3.0.3, so we should probably just leave this for a little
> while.

Another option after 3.0.3 is to allow grant tables to support these large
mappings. I have some ideas how to do this fairly efficiently, given that
it'll be okay to track mappings to all the pages as an aggregate. It's not
going to happen for now though -- it'll just be a shame if we add
grant-table support later that it'll change the setup protocol. However, we
can probably maintain backward compatibility if we think about it a bit.

 -- Keir

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