nova/releasenotes/notes/fix-pci-passthrough-for-cav...

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---
fixes:
- |
On some hardware platforms, an SR-IOV virtual function for a NIC port may
exist without being associated with a parent physical function that has
an assocatied netdev. In such a case the the PF interface name lookup
will fail. As the ``PciDeviceNotFoundById`` exception was not handled
this would prevent the nova compute agent from starting on affected
hardware. See: https://bugs.launchpad.net/nova/+bug/1915255 for more
details. This edgecase has now been addressed, however, features
that depend on the PF name such as minimum bandwidth based QoS cannot
be supported on these platforms.