Comment 0 for bug 1783140

Environment:
2 POWER8 with Ubuntu 16.04.4 LTS as KVM hypervisor.
1 KVM guest with Ubuntu 18.04 LTS. Virtual disk for the guest is a qcow2 file on an NFS share, accessible from both hypervisors, so live migration is possible and works for all other guests (SLES, RHEL, Ubunutu 16.04),
Live migratino of Ubuntu 18.04 guest fails on ppc, while the same test on an x86_64 environment suceeds.

root@pkvm2:~# virsh migrate --persistent --live p8lnxtst4 qemu+ssh://pkvm1/system
error: internal error: early end of file from monitor, possible problem: 2018-07-23T11:12:25.586385Z qemu-system-ppc64: VQ 0 size 0x100 Guest index 0x38aa inconsistent with Host index 0xa980: delta 0x8f2a
2018-07-23T11:12:25.586434Z qemu-system-ppc64: error while loading state for instance 0x0 of device 'pci@800000020000000:01.0/virtio-net'
2018-07-23T11:12:25.587246Z qemu-system-ppc64: load of migration failed: Operation not permitted

root@pkvm2:~# uname -a
Linux pkvm2 4.4.0-130-generic #156-Ubuntu SMP Thu Jun 14 08:51:21 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux