b8e77deeef
When using the 'q35' machine type, by default, it allows only a single PCIe device to be hotplugged. Nova currently sets 'num_pcie_ports' to "0" (defaults to libvirt's "1"), which is not sufficient for hotplug use. The max value is 28, but 16 is enough in most cases. More info please check * [0] https://libvirt.org/pci-hotplug.html * [1] https://marcin.juszkiewicz.com.pl/2018/02/19/hotplug-in-vm-easy-to-say/ * [2] https://review.opendev.org/c/openstack/nova/+/545034 Co-Authored-By: Bartosz Bezak <bartosz@stackhpc.com> Change-Id: I7b8063566837aeb947927b7d6858417982b63deb Closes-Bug: 1909063