[Libvir] Question about specifications of virsh start

[Masayuki Sunou]

Thanks for answering. 

> Do you know what we can use to determine if the PV drivers are installed 
> in a domain?  I don't think there is anything extrinsic, so perhaps we 
> need to add something to the XML domain description.
> 
I also do not know a method to distinguish whether PV drivers are installed 
in a domain. 

I think that there is only a method of changing XML to fix it,
if libvirt supports starting of a domain which installed PV drivers.
However, it is not a proper idea.

Thanks,
Masayuki Sunou

In message <4731BE88.3090207 at redhat.com>
   "Re: [Libvir] Question about specifications of virsh start"
   ""Richard W.M. Jones" <rjones at redhat.com>" wrote:

> Masayuki Sunou wrote:
> > Hi
> > 
> > I have a question about specifications of virsh start.
> > 
> > It is necessary to remove "type=ioemu" from the configuration file of Xen,
> > when HVM domain installed Para Virtualized Driver use unmodified driver
> > on Xen 3.0.3.
> > 
> > But,libvirt always adds "type=ioemu" to vif of HVM domain in xm_internal.c.
> > Therefore virsh start cannot start correctly HVM domain installed
> > Para Virtualized Driver.
> > 
> > Could you teach why does libvirt disregard setting of configuration
> > file and set type=ioemu ?
> 
> This is surely a bug in libvirt, src/xm_internal.c, xenXMParseXMLVif:
> 
>      if (hvm) {
>          strcat(buf, ",type=ioemu");
>      }
> 
> Do you know what we can use to determine if the PV drivers are installed 
> in a domain?  I don't think there is anything extrinsic, so perhaps we 
> need to add something to the XML domain description.
> 
> Rich.
> 
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