Bind 2nd VM to same OVS vhost-user port caused 1st vm traffic broken 

Binding 2nd VM to same OVS vhost-user port caused 1st vm traffic broken. If it illegal to share same vhost port, how about the first VM open the path exclusively?


#OVS side to create the vhost-user port:
ovs-vsctl add-br br0 -- set bridge br0 datapath_type=netdev
ovs-vsctl add-port br0 phy0 -- set Interface phy0 type=dpdk options:dpdk-devargs=0000:0a:00.0
ovs-vsctl add-port br0 dpdkvhostuser0 -- set Interface dpdkvhostuser0 type=dpdkvhostuser

#QEMU VM1
qemu-system-x86_64 -name vm1 -cpu host -enable-kvm -m 3072 -drive file=/opt/ubuntu1.qcow2  \
  -numa node,memdev=mem -mem-prealloc -smp sockets=1,cores=2 \
  -object memory-backend-file,id=mem,size=3072m,mem-path=/dev/hugepages,share=on \
  -chardev socket,id=char0,path=/usr/local/var/run/openvswitch/dpdkvhostuser0 \  -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
  -device virtio-net-pci,mac=00:00:00:00:00:01,netdev=mynet1,mrg_rxbuf=off

#VM2
qemu-system-x86_64 -name vm2 -cpu host -enable-kvm -m 3072 -drive file=/opt/ubuntu2.qcow2  \
  -numa node,memdev=mem -mem-prealloc -smp sockets=1,cores=2 \
  -object memory-backend-file,id=mem,size=3072m,mem-path=/dev/hugepages,share=on \
  -chardev socket,id=char0,path=/usr/local/var/run/openvswitch/dpdkvhostuser0 \  -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
  -device virtio-net-pci,mac=00:00:00:00:00:01,netdev=mynet1,mrg_rxbuf=off