Il 01/09/2014 15:22, Christian Borntraeger ha scritto: > > > If virtio-blk and virtio-serial share an IRQ, the guest operating system > > > has to check each virtqueue for activity. Maybe there is some > > > inefficiency doing that. > > > AFAIK virtio-serial registers 64 virtqueues (on 31 ports + console) even > > > if everything is unused. > > > > That could be the case if MSI is disabled. > > Do the windows virtio drivers enable MSIs, in their inf file?
It depends on the version of the drivers, but it is a reasonable guess at what differs between Linux and Windows. Haoyu, can you give us the output of lspci from a Linux guest? Paolo
