Open Stack

On 04/09/2013 03:12 AM, Guillaume Thouvenin wrote:
> Hello,
>
>  Here is my use case. I have a machine with GPU and I want to provide an 
> instance that can start an X server and use the GPU to allow 3D rendering.
>
>  The BIOS installed on my machine doesn't allow IOMMU. So the solution I see 
> is to use a compute node with the Linux container driver.
>
>  To be able to start an X server in a container and to use GPU (available 
> through /dev/nvidiaX on my machine) with virtualGL for example I need to 
> attach some PCI devices (/dev/ttyX and /dev/nvidiaY) to the guest. To achieve 
> this I'm using the "hostdev" element in the XML configuration file of the 
> container.
>
>  I looked in the code of nova/virt/libvirt/config.py that generates the XML 
> file for instance and I didn't see any "hostdev" element [1]. So it seems that 
> currently this feature (ie attached PCI devices from the host to the guest 
> using the hostdev element) is not yet supported.
>
>  As I'm new to openstack I'd like to ask if it makes sense to propose a 
> blueprint to add this feature.

A blueprint already exists for this feature

https://blueprints.launchpad.net/nova/+spec/pci-passthrough-and-sr-iov

And looks like it will be discussed at the design summit

http://summit.openstack.org/cfp/details/29

Regards,
Jim