[ovs-dev] vhost user cannot recv any packet from VM

[Tim Deng]

Hi,

I am using the latest ovs code base to try vhost user based on Ciara Loftus's patch
("[PATCH v4] netdev-dpdk: add dpdk vhost-user ports" which is not in ovs upstream yet).

things go smoothly during VM bootstrap, as I can see following logs:
VHOST_CONFIG: new virtio connection is 47
VHOST_CONFIG: new device, handle is 0
VHOST_CONFIG: read message VHOST_USER_SET_OWNER
VHOST_CONFIG: read message VHOST_USER_GET_FEATURES
VHOST_CONFIG: read message VHOST_USER_SET_VRING_CALL
VHOST_CONFIG: vring call idx:0 file:48
VHOST_CONFIG: read message VHOST_USER_SET_VRING_CALL
VHOST_CONFIG: vring call idx:1 file:49
VHOST_CONFIG: read message VHOST_USER_SET_VRING_CALL
VHOST_CONFIG: vring call idx:0 file:50
VHOST_CONFIG: read message VHOST_USER_SET_VRING_CALL
VHOST_CONFIG: vring call idx:1 file:48
VHOST_CONFIG: read message VHOST_USER_SET_FEATURES
VHOST_CONFIG: (0) Mergeable RX buffers disabled
VHOST_CONFIG: read message VHOST_USER_SET_MEM_TABLE
VHOST_CONFIG: mapped region 0 fd:49 to 0x7f6740000000 sz:0xa0000 off:0x0
VHOST_CONFIG: REGION: 0 GPA: (nil) QEMU VA: 0x7f7340000000 SIZE (655360)
VHOST_CONFIG: mapped region 1 fd:51 to 0x7f6700000000 sz:0x40000000 off:0xc0000
VHOST_CONFIG: REGION: 1 GPA: 0xc0000 QEMU VA: 0x7f73400c0000 SIZE (1072955392)
VHOST_CONFIG: read message VHOST_USER_SET_VRING_NUM
VHOST_CONFIG: read message VHOST_USER_SET_VRING_BASE
VHOST_CONFIG: read message VHOST_USER_SET_VRING_ADDR
VHOST_CONFIG: (0) mapped address desc: 0x7f6739fdc000
VHOST_CONFIG: (0) mapped address avail: 0x7f6739fdd000
VHOST_CONFIG: (0) mapped address used: 0x7f6739fde000
VHOST_CONFIG: read message VHOST_USER_SET_VRING_KICK
VHOST_CONFIG: vring kick idx:0 file:52
VHOST_CONFIG: virtio isn't ready for processing.
VHOST_CONFIG: read message VHOST_USER_SET_VRING_NUM
VHOST_CONFIG: read message VHOST_USER_SET_VRING_BASE
VHOST_CONFIG: read message VHOST_USER_SET_VRING_ADDR
VHOST_CONFIG: (0) mapped address desc: 0x7f6739fb4000
VHOST_CONFIG: (0) mapped address avail: 0x7f6739fb5000
VHOST_CONFIG: (0) mapped address used: 0x7f6739fb6000
VHOST_CONFIG: read message VHOST_USER_SET_VRING_KICK
VHOST_CONFIG: vring kick idx:1 file:53
VHOST_CONFIG: virtio is now ready for processing.
2015-05-23T04:02:33Z|00001|dpdk(vhost_thread2)|INFO|vHost Device '/usr/local/var/run/openvswitch/dpdkvhostuser0' (0) has been added

However I cannot see any packet was polled afterwards even I generated some traffic inside the VM.

My host and VM are using 3.19.0-15-generic, and qemu 2.2.0 is used.

Could any one please share any hint?

Thanks,
Tim