Failure to create VMs with more than 32 SR-IOV NICs

Issue

• Failure to create VMs with more than 32 SR-IOV NICs with error similar to this:

2019-05-25 01:40:52.037 236071 ERROR nova.scheduler.utils [req-ed4c38b7-d25f-4398-9bd0-8dd0043c8bc8 e4d76435eedbf18d741e3d13f8ad779f55ffa1c7520481c3bb7958c0bb0c1975 b6f589f70d5c4090808be6c432cd2c64 - - -] [instance: 6aeb22ce-f591-4276-9c7f-022848fdaab5] Error from last host: openstack-overcloud-compute-0 (node openstack-overcloud-compute-0.localdomain): [u'Traceback (most recent call last):\n', u'  File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 1783, in _do_build_and_run_instance\n    filter_properties)\n', u'  File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 1981, in _build_and_run_instance\n    instance_uuid=instance.uuid, reason=six.text_type(e))\n', u"RescheduledException: Build of instance 6aeb22ce-f591-4276-9c7f-022848fdaab5 was re-scheduled: internal error: qemu unexpectedly closed the monitor: a -device vfio-pci,host=0e:1c.6,id=hostdev22,bus=pci.0,addr=0x1b -device vfio-pci,host=0e:1c.7,id=hostdev23,bus=pci.0,addr=0x1c -device vfio-pci,host=0e:1c.4,id=hostdev24,bus=pci.0,addr=0x1d -device vfio-pci,host=0e:1c.5,id=hostdev25,bus=pci.0,addr=0x1e -device vfio-pci,host=0e:1c.2,id=hostdev26,bus=pci.0,addr=0x1f -device vfio-pci,host=0e:1c.3,id=hostdev27,bus=pci.1,addr=0x1 -device vfio-pci,host=0e:1c.0,id=hostdev28,bus=pci.1,addr=0x2 -device vfio-pci,host=0e:1c.1,id=hostdev29,bus=pci.1,addr=0x3 -device vfio-pci,host=0e:1b.6,id=hostdev30,bus=pci.1,addr=0x4 -device vfio-pci,host=0e:1b.7,id=hostdev31,bus=pci.1,addr=0x5 -device vfio-pci,host=0e:1b.4,id=hostdev32,bus=pci.1,addr=0x6 -device vfio-pci,host=0e:1b.5,id=hostdev33,bus=pci.1,addr=0x7 -device virtio-balloon-pci,id=balloon0,bus=pci.1,addr=0x8 -msg timestamp=on\nwarning: host doesn't support requested feature: CPUID.01H:EDX.ds [bit 21]\nwarning: host doesn't support requested feature: CPUID.01H:EDX.acpi [bit 22]\nwarni\n"]