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Re: [libvirt] [PATCH 0/7] Revamped Smbios/Sysinfo support v2

On Fri, Nov 05, 2010 at 10:11:00AM -0600, Eric Blake wrote:
> On 11/05/2010 09:46 AM, Daniel Veillard wrote:
> > v2: incorporates Dan suggestions especially move smbios into <os>
> > 
> > This patch set implements a new way to store system informations and
> > pass them to the domain, it's modelled on the SMBIOS support in
> > hypervisors using a complete emulation (type hvm) and allow to override
> > those informations in domains:
> > 
> > The simplest is the use of:
> > 
> >   <os>
> >     <type>hvm</type>
> >     <smbios mode="host"/>
> >   <os>
> > 
> > in which case the domain will try to inherit those values from
> > the Host own values, the classical use case is the use of OEM'ed
> > Windows versions where one need to export SMBIOS informations from
> > the host to the guest.
> How does this interact with migration?  Will the guest see different
> host information (either at the moment of migration, or on the first
> reboot after migration), or are we planning on treating this as
> shorthand, and internally converting it to a <sysinfo> tree as part of
> the migration?

  <smbios mode="host"/> clearly can't play well with migration.
With the current code since the internal XML is not extended
the SMBIOS values will be seen as changing during run from a guest
OS point of view.
  I'm not sure it's worth trying to "fix" this, unless having
another mode where host data at define time gets turned into
a domain sysinfo.


Daniel Veillard      | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
daniel veillard com  | Rpmfind RPM search engine http://rpmfind.net/
http://veillard.com/ | virtualization library  http://libvirt.org/

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