Re: [Xen-devel] doubt on domU segment mappings

[Sandesh <sandesh.ahiremath@xxxxxxxxx>]

On Mon, 2008-07-21 at 17:55 +0100, Samuel Thibault wrote:
> Sandesh, le Mon 21 Jul 2008 22:34:33 +0530, a Ãcrit :
> > > These are constructed by the PV domain builder just for the domU.
> > > DomU
> > > is then free to do whatever it wants with it, dom0 doesn't care at
> > > all
> > but aren't these mappings in the dom0 page tables?
>
> Just temporarily when the domain builder fills them, but as soon as it's
> built, they are unmapped.
>
> > Once the domU is running how can i change them?
>
> What for?
basically right after shutdown with poweroff = 'preserve' option i want
to reboot the domU without having to going through the whole domain
building process. So i need to load the different domU segments again,
or at least the pt_base mapping.
>
> > like how will i know which entries in the dom0 pgtables corresponds to
> > kernel_seg or ramdisk_seg and so on..
>
> Again, dom0 doesn't map them any more, it doesn't need them any more.
then how will the domU kernel memory is accessed? are they mapped to the
domU pg_tables?
>
> Samuel


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