At 20:47 +0800 on 05 Dec (1196887651), tgh wrote:
> hi
> in the PV mode, when VM is migrated, the shadow page table will be
> created , that is ,the every active process pagetable in the guestOS
> will have a copy in the VMM, while the original one is maintianed as
> virtual-to-physical address mapping , is it right?
Yes, though as I said we only shadow pagetables on demand when they are used.
> then, when the
> guestOS process is scheduled , the shadow page table will be set into
> the CR3 and the CPU address mapping will be worked with the shadow
> pagetable rather than the original one, is it right?
Yes.
> while every update
> to the process original pagetable in the guestOS will be trap into the
> VMM , where the shadow pagetable is updated and coherented with the
> original one, is it right?
Yes.
Why are you asking this, by the way? Are you trying to write code,
or debug a problem, or write documentation?
Tim.
--
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Citrix Systems.
[Company #5334508: XenSource UK Ltd, reg'd c/o EC2Y 5EB, UK.]
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