Re: [Xen-devel] Memory strategy in xen

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

On Sun, Nov 17, 2013 at 12:26 AM, Yunbin Wang <wangyunbin1989@xxxxxxxxx> wrote:
> Hi all,
> I'm a newer to xen. But now I need to do research about live migration in
> xen. And now I'm confused with some questions:
> 1. Is shadowing page used in both paravirtualization and hvm mode? Since
> from source code xc_domain_save.c, I see the following code to get dirty
> memory bitmap,
>
> frc = xc_shadow_control(
>                     xch, dom, XEN_DOMCTL_SHADOW_OP_PEEK,
> HYPERCALL_BUFFER(to_skip),
>                     dinfo->p2m_size, NULL, 0, NULL);

Shadow mode is enabled for PV guests only when doing migration.

 -George

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