From SemanticLab

Start KVM

• Without paravirtualization (starts the instance with the slower standard network and disk emulation)

 kvm -hda /dev/mapper/vg_root-xmiguana -m 512 \
     -net nic,vlan=0,model=rtl8139,mac={mac-address} -net tap,vlan=0 \
     -daemonize \
     -vnc localhost:0

• Daemonized using the host's kernel (with paravirtualization)

  kvm -drive file=/dev/mapper/{volume_name},if=virtio,boot=on -m 512 \
      -net nic,vlan=0,model=virtio,macaddr={mac-address} -net tap,vlan=0 \
      -kernel /vmlinuz -initrd /initrd.img -append "root=/dev/vda ro" 
      -smp 2 -daemonize \
      -vnc localhost:0