Re: [Xen-devel] Fast checkpoints with COW VM memory

["Mike Sun" <msun@xxxxxxxxxx>]

Hi --

I'm currently in the process of implementing the COW functionality.
It will probably take me some time, but I'll get back to you when I
have a better idea of what the timeline will be.

Mike

On Jan 15, 2008 10:23 PM, tgh <wwwwww4187@xxxxxxxxxxx> wrote:
> hi
> I am interested in the COW VM memory ,and are there some code or patch
> about it ,or still in process ,or in plan? and if it has been
> implemented and integrated in the source tree, then ,what is the way to
> use it ? say , fast checkpoint, or VM fork ?or something else? is it
> available to use ? or how to do it ?
>
> Thanks
>
>
>
>
> Tim Deegan 写道:
>
> > At 14:59 -0500 on 05 Dec (1196866790), Mike Sun wrote:
> >
> >> According to the Xen Roadmap for 2006, there was talk of copy-on-write
> >> functionality that could be developed easily from the
> >> save/restore/migration code to enable features such as fast
> >> checkpoints or even VM forks.
> >>
> >
> > FSVO "easily". :)  I am working on extending the typed P2M work I did a
> > while ago to allow pages to be marked copy-on-write, and other similar
> > memory tricks.  It's still in the planning stage, but I hope to have
> > some patches for comment fairly soon.
> >
> > Brendan Cully gave a talk on this area at the last Summit, and I know
> > there is more work going on at UBC too.
> >
> > Tim

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