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xen-devel
Re: [Xen-devel] Shadow page tables?
If the shadow pagetable is enabled, Xen will maintain pagetables for
every guest process. If 1000 processes are running in the guest, xen
will at least allocate 1000 pages as shadow pagetables. Will it
consume too many memory frames?
On Fri, 08 Oct 2004 10:11:18 +0100, Keir Fraser
<keir.fraser@xxxxxxxxxxxx> wrote:
>
> Currently, shadow p.t.'s are only enabled when migrating OSes between
> machines. This allows us to copy the memory image while the OS is
> still running, and track which pages are updated after being copied
> (and so need to be recopied).
>
> We intend to flesh out the shadow p.t. code a little mroe to support
> full memory virtualisation. It's not there yet, but it won't require
> an enormous amount of code to get it going.
>
> -- Keir
>
>
>
> > Hi,
> >
> > I'm using Xen 2.0 (base kernel is 2.6.8.1) and found that it doesn't
> > enable the shadow page tables in Xen though there is code there.
> >
> > If the shadow page tables are enabled, does it mean that the guest
> > Linux' memory management module could be fully virtualized?
> >
> > Thanks,
> > Chengyuan
> >
> >
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