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Re: [Xen-devel] Sharing machine pages among domains

To: Haifeng He <hehaifeng2nd@xxxxxxxxx>, Daniel Stodden <stodden@xxxxxxxxxx>
Subject: Re: [Xen-devel] Sharing machine pages among domains
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Wed, 21 Nov 2007 07:56:10 +0000
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On 21/11/07 04:45, "Haifeng He" <hehaifeng2nd@xxxxxxxxx> wrote:

> Thank you for your reply. I checked the above code.
> If I understand correctly, the page sharing of console and xenstore is
> between dom0 and domU instead of between domUs. Secondly,
> the mapping is one to one, i.e., one mfn page allocated to domU
> is mapped to dom0. However, what I am looking for is, probably one to many
> mapping. That is, one mfn page can be mapped into physical page in
> multiple domUs and shared by them. Any idea?

This isn't currently possible.

 -- Keir



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