Comment 0 for bug 1647389

See updates at the end of #1612089. Sample error message:

Dec 05 14:41:07 zbk130713 libvirtd[29690]: internal error: early end of file from monitor, possible problem:
2016-12-05T14:41:07.903932Z qemu-system-x86_64: VQ 2 size 0x80 < last_avail_idx 0x9 - used_idx 0xa
2016-12-05T14:41:07.903981Z qemu-system-x86_64: error while loading state for instance 0x0 of device '0000:00:05.0/virtio-balloon'
2016-12-05T14:41:07.905180Z qemu-system-x86_64: load of migration failed: Operation not permitted

Seems related to this patch series:
https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg03079.html