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RE: [Xen-devel] paging mechanism clarification

To: "Mark Williamson" <mark.williamson@xxxxxxxxxxxx>, "Pradeep Singh, TLS-Chennai" <pradeep_s@xxxxxx>
Subject: RE: [Xen-devel] paging mechanism clarification
From: "Puthiyaparambil, Aravindh" <aravindh.puthiyaparambil@xxxxxxxxxx>
Date: Wed, 14 Mar 2007 10:26:00 -0400
Cc: "Petersson, Mats" <Mats.Petersson@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
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Thread-topic: [Xen-devel] paging mechanism clarification
> >  Now again i am confused :-(.
> >  you mean shadow tables are not used at all in case of PV guests if
i am
> > not using live migration at all? They are used as default only in
> of
> > HVM guests, with or without live migration right?
> Normally, PV guests manage the real hardware pagetable so there are no
> shadow
> pagetables.  Xen just limits what they're allowed to do with their
> pagetables
> to prevent abuse.

You can make the PV guest use shadow pagetables if you turn on the
autotranslated physmap feature. But I am not sure if this feature still
works in the latest tip.


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