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

  • To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
  • From: "Haifeng He" <hehaifeng2nd@xxxxxxxxx>
  • Date: Wed, 21 Nov 2007 01:59:32 -0700
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Daniel Stodden <stodden@xxxxxxxxxx>
  • Delivery-date: Wed, 21 Nov 2007 01:00:10 -0800
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On Nov 21, 2007 12:56 AM, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:
> 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.
But is there a way to do it by modifying the Xen source? For example, during
domain creation, is it possible to let Xen assign certain mfn pages to
physical pages in the new domain?

( I have been trying to figure out how Xen assign mfn pages to new
domain but still
not very successful. The code looks quite complicated.)



>  -- Keir

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