Hot answers tagged virtio
KVM provides paravirtualization drivers for several bits of hardware; this particular one is the memory balloon driver. In particular, you should see virtio_net when using the virtio network drivers, and virtio_blk when using the block device (disk) driver. And in the latter case, your disk would be /dev/vda instead of /dev/sda. In your case, the virtio ...
The virtio drivers are meant to provide paravirtualized hardware (acceleration) device drivers to virtual machine guests. As such, they are device drivers that are installed in the guest operating system, not on the host. You can find the virtio drivers for Windows from the KVM web site.
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