[Qemu-devel] [PATCH v6 0/2] vhost-user multi queue support

[Ouyang Changchun <changchun.ouyang@intel.com>]

Vhost-user will implement the multi queue support in a similar way
to what vhost already has - a separate thread for each queue.
To enable the multi queue functionality - a new command line parameter
"queues" is introduced for the vhost-user netdev.

Use new message VHOST_USER_SET_VRING_FLAG to enable and disable an
actual virt queue, which is similar to attach/detach queue for tap device.
virtio driver on guest doesn't have to use max virt queue pair, it could
enable any number of virt queue ranging from 1 to max virt queue pair.
 
It requires that VHOST_USER_F_PROTOCOL_FEATURES is present.

Any comment is welcome for the patch set.

It has dependency on a few other patch(set):
"vhost-user: protocol updates" series
proposed earlier by Michael S. Tsirkin

RESET_OWNER change is based on commit:
294ce717e0f212ed0763307f3eab72b4a1bdf4d0  

Changchun Ouyang (2):
  vhost-user: add multi queue support
  vhost-user: new protocol feature for multi queue

 docs/specs/vhost-user.txt         | 24 +++++++++++++++++++-
 hw/net/vhost_net.c                | 21 +++++++++++++++++-
 hw/net/virtio-net.c               |  2 ++
 hw/virtio/vhost-user.c            | 46 ++++++++++++++++++++++++++++++++++++---
 include/hw/virtio/vhost-backend.h |  2 ++
 include/net/vhost_net.h           |  1 +
 net/vhost-user.c                  | 37 ++++++++++++++++++++-----------
 qapi-schema.json                  |  6 ++++-
 qemu-options.hx                   |  5 +++--
 9 files changed, 123 insertions(+), 21 deletions(-)

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1.8.4.2