Comment 6 for bug 1551504

to Nikola Đipanov (ndipanov) ：
    this is not related to libvirt version， all compute nodes's libvirt version is 1.2.21. in my envrioment.
   some nodes can report pci numa info ,but other nodes can't report.
   we found the reason is related node‘s hardware configuration and BIOS version，
  but some compute can't update BIOS version。

  so this is an issue in practice，sometime，People who care about this feature
  will be wrong thought pci devices is on the numa node that CPU\MEM on. but in fact， it does not。

 And I agree with you that nova should care about system reporting None for device NUMA node。

So, my new desired behavior is（@Ludovic Beliveau）:

Pci without numa_node will be ignore when launch an instance with some specific PCI resources。

But these pci devices are available when launch an instance without specific PCI resources