openstack team mailing list archive

[Jim Fehlig <jfehlig@xxxxxxxx>]

Sorry for the delayed response.

Boris-Michel Deschenes wrote:
> That would be great Jim,
>
> I've built a cloud that uses CentOS+libvirt+Xen 4.1.3 to do GPU passthrough and I just love to be able to use libvirt with Xen, this setup makes a lot of sense to me since our main, bigger cloud is the standard libvirt+KVM, using libvirt across the board is great for us.
>
> I'm following your work closely, the GPU cloud is still using libvirt+xend but when I move to Xen 4.2 my understanding is that I will need libvirt+xl (xenlight) so I guess there's still some work to be done in libvirt there...
>   

Yes, there is.  libxl changed significantly between Xen 4.1 and soon to
be released Xen 4.2, so much so that the current libvirt libxl driver
won't even build against Xen 4.2.  In addition, the libxl driver does
not have feature parity with the legacy xen driver.  So lots of work to
be done, but I have limited free cycles.  I'm hoping to get another body
or two at SUSE to help with this work.

That said, xm/xend will still be included in Xen 4.2 and can be
configured as the primary tool stack, allowing you to continue using
your existing setup with Xen 4.2.

Regards,
Jim

> The reason I want to move to Xen 4.2 is the GPU passthrough of NVIDIA GPUs... currently, with Xen 4.1.3, I successfully passthrough ATI GPUs only.
>
> Boris
>
> -----Message d'origine-----
> De : openstack-bounces+boris-michel.deschenes=ubisoft.com@xxxxxxxxxxxxxxxxxxx [mailto:openstack-bounces+boris-michel.deschenes=ubisoft.com@xxxxxxxxxxxxxxxxxxx] De la part de Jim Fehlig
> Envoyé : 18 juillet 2012 17:56
> À : John Garbutt
> Cc : openstack@xxxxxxxxxxxxxxxxxxx
> Objet : Re: [Openstack] What is the most commonly used Hypervisor and toolset combination?
>
> John Garbutt wrote:
>   
>> To my knowledge, if you want to use Xen, using XCP or XenServer (i.e. using XenAPI driver) is the way to go. If you look at the contributions to the drivers, you can have a good guess at who is using them.
>>
>> I know people are going into production on XenAPI, not heard about Xen+libvirt in production. Having said this, I have seen some fixes to Folsom around Xen + libvirt, I think from SUSE?
>>   
>>     
>
> Yes, I'm slowly working on improving support for xen.org Xen via the libvirt driver and hope to have these improvements in for the Folsom release.
>
> Regards,
> Jim
>
>
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