Re: [Xen-devel] Question on RHEL 6 support

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, Oct 21, 2011 at 10:29:46AM +0530, Alok Sinha wrote:
> Pasi,
> 
>    Thanks for your response.
>    So how do I disable xen platform device for VM? Any pointers?
>

You should be able to change it from /etc/xen/<name_of_the_vm> configfile.

Try:
xen_platform_pci=0

-- Pasi

> 
> On Oct 20, 2011, at 7:30 PM, Pasi Kärkkäinen wrote:
> 
> > On Thu, Oct 20, 2011 at 04:18:07PM +0530, Alok Sinha wrote:
> >>   Hi,
> > 
> > Hello,
> > 
> >>      I am trying to run RHEL 6 as guest over XEN (RHEL 5.6 as host)
> >>   hypervisor.
> >>      It seems that RHEL 6 loads the paravirt drivers by default and thus 
> >> HVM
> >>   mode is not working.
> >>      Any idea on this?
> > 
> > What do you mean with "HVM mode is not working" ?
> > 
> > PVHVM drivers (for HVM guests) are there to make disk/net performance a LOT 
> > better!
> > The default qemu-dm emulated ide controller and realtek nic are not very 
> > efficient..
> > 
> >>      I saw somewhere that including xen_emul_unplug=never will help. Is
> >>   there any other way it can be avoided?
> >> 
> > 
> > You can also disable the xen platform pci device for that VM from dom0, 
> > then the VM will not activate PVHVM drivers.
> > 
> > -- Pasi
> > 
> 

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