Re: doubt on domU segment mappings

[Samuel Thibault <samuel.thibault@eu.citrix.com>]

Sandesh, le Mon 21 Jul 2008 22:43:13 +0530, a écrit :
> > > 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.

Well the problem is that the domU most probably has destroyed it
completely already.

> > > 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?

Yes.  No need for anybody else to access it (except PV interfaces, but
then the MFNs or grants are explicitely given by the domU).

Samuel