[libvirt-users] NUMA VM and assigning interfaces

[Laine Stump]

On 11/21/2016 04:48 PM, Amir Shehata wrote:
> Laine,
>
> Thank you for your response.
>
> I did use the numa element instead of using qemu commandline and that 
> worked:
>
>  16   <cpu mode='custom' match='exact'>
> ...
>  34     <numa>
>  35       <cell id='0' cpus='0-1' memory='1048576' unit='KiB'/>
>  36       <cell id='1' cpus='2-3' memory='1048576' unit='KiB'/>
>  37     </numa>
>  38   </cpu>
>
> However, whenever I try to use the pci-expander-bus I get:
> error: XML document failed to validate against schema: Unable to 
> validate doc against /usr/share/libvirt/schemas/domain.rng
> Extra element devices in interleave
> Element domain failed to validate content

Sorry, I forgot to mention that pci-expander-bus is a fairly recent 
addition to libvirt and qemu. For libvirt support of that controller, 
you'll need at least libvirt 1.3.4, and qemu 2.4.0. Anything earlier 
than that and the guest OS won't have any visibility to the NUMA node of 
specific devices.


>
> I tried the following
>
>  93     <controller type='pci' index='1' model='pci-expander-bus'>
>  94       <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' 
> function='0x0'/>
>  95     </controller>
>
> and
>
>  93     <controller type='pci' index='1' model='pci-expander-bus'>
>  94       <target busNr='254'>
>  95         <node>1</node>
>  96       </target>
>  97       <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' 
> function='0x0'/>
>  98     </controller>
>
>
> I got the syntax from: 
> https://www.redhat.com/archives/libvir-list/2016-March/msg01224.html
>
> Just to give you a bit more info. This is running on:
> Linux ashehata-DellPE 3.19.0-51-generic #58-Ubuntu SMP Fri Feb 26 
> 21:22:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

>
> below is a dump of the working XML file I'm using

I notice you don't have any device with pci bus='1'. I'm assuming you 
just hadn't gotten to that part of the experiment yet, correct?