On Mon, Jun 15, 2015 at 02:12:40PM +0200, Thibaut Collet wrote: > After a resume operation the guest always kicks the backend for each > virtual queues. > A live migration does a suspend operation on the old host and a resume > operation on the new host. So the backend has a kick after migration. > > I have checked this point with a legacy guest (redhat 6-5 with kernel > version 2.6.32-431.29.2) and the kick occurs after migration or > resume. > > Jason have you an example of legacy guest that will not kick the > virtual queue after a resume ?
In practice with sufficiently modern guests you can look at DRIVER_OK status bit. Process rings if that bit is set. -- MST
