* Jens Freimann (address@hidden) wrote:
In "b06424de62 migration: Disable hotplug/unplug during migration" we
added a check to disable unplug for all devices until we have figured
out what works. For failover primary devices qdev_unplug() is called
from the migration handler, i.e. during migration.
This patch adds a flag to DeviceState which is set to false for all
devices and makes an exception for vfio-pci devices that are also
primary devices in a failover pair.
Signed-off-by: Jens Freimann <address@hidden>
So I think this is safe in your case, because you trigger the unplug
right at the start of migration during setup and plug after failure;
however it's not generally safe - I can't unplug a device while the
migration is actually in progress.