[Xen-devel] Re: how to enable shadow page table? Do I have to run HVM guest systems for shadow paging mode?

[Tim Deegan <Tim.Deegan@xxxxxxxxxx>]

At 16:30 +0000 on 16 Mar (1237221012), Jeremy Fitzhardinge wrote:
> Long Wang wrote:
> > I am working on a research project based on Xen 3.3.1. I want to use the
> > shadow page table for setting guest system memory pages as read-only and/or
> > dirty, and perform a copy-on-write mechanism when these memory pages are
> > updated.

Several people are already working on copy-on-write memory in Xen, or
variations on that theme (Mike Sun, Patrick Colp, John Byrne, and
others) as well as more exotic things like Difference Engine and
Transcendent Memory.  It would probably be better to talk to those
people and try to help their efforts than start from scratch.

Patrick Colp's slides from the most recent Xen Summit give an idea of
one method of implementing it:
http://www.xen.org/files/xensummit_oracle09/VMSnapshots.pdf

Cheers,

Tim.

-- 
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Citrix Systems (R&D) Ltd.
[Company #02300071, SL9 0DZ, UK.]

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