kernel/Documentation/virt/kvm/devices/vm.rst
.. .. @@ -302,6 +302,10 @@ 302 302 Setting this attribute when migration mode is already active will have 303 303 no effects. 304 304 305 +Dirty tracking must be enabled on all memslots, else -EINVAL is returned. When306 +dirty tracking is disabled on any memslot, migration mode is automatically307 +stopped.308 +305 309 :Parameters: none 306 310 :Returns: -ENOMEM if there is not enough free memory to start migration mode; 307 311 -EINVAL if the state of the VM is invalid (e.g. no memory defined);