A method is provided to migrate a
virtual machine from a source computing
machine to a destination computing
machine comprising: suspending transmission of requests from a
request queue disposed in source computing
machine memory associated with the VM from the
request queue to a VF; while suspending the transmission of requests, determining when no more outstanding responses to prior requests remain to be received; in response to a determination that no more outstanding responses to prior requests remain to be received, transferring state information that is indicative of locations of requests inserted to the
request queue from the VF to a PF and from the PF to a memory region associated with a
virtualization intermediary of the source computing machine. After transferring the state information to source computing machine memory associated with a
virtualization intermediary, resuming transmission of requests from locations of the request
queue indicated by the state information to the PF; and transmitting the requests from the PF to the physical storage.