Re: [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support

[Marcel Apfelbaum <marcel.apfelbaum@gmail.com>]

On 09/15/2015 10:10 AM, Yuanhan Liu wrote:
> Hi,
>
> Here is the updated patch set for enabling vhost-user multiple queue.

Hi,

I think this series will not work with the current DPDK vhost-user MQ patches,
can you please post an RFC on the dpdk list?
If you don't have anything reedy yet, a pointer to a git would also be appreciated.

Thanks,
Marcel

>
> This patch set introduces 2 more vhost user messages: VHOST_USER_GET_QUEUE_NUM,
> for querying how many queues the backend supports, and VHOST_USER_SET_VRING_ENABLE,
> for enabling/disabling a specific virt queue.
>
> Both of the two new messages are treated as vhost protocol extension,
> and that's why Michaels's patch "vhost-user: add protocol feature
> negotiation" is also included here.
>
> Patch 1-5 are all prepare works for actually enabling multiple queue.
>
> Patch 6 is the major patch for enabling multiple queue, which also tries
> to address two major concerns from Michael: no feedback from backend if
> it can't support # of requested queues, and all messages are sent N time.
> It also fixes a hidden bug.
>
> Patch 7 introduces the VHOST_USER_SET_VRING_ENABLE message, to enable
> or disable a specific vring.
>
> Note that I haven't done any formal test yet, it just passes build
> test and basic functional test, such as it does exit when backend
> doesn't support # of requested queues. Here I sent it out just for
> more comments, and for avoiding spending too much effort on the wrong
> track.
>
>
> v9: - Per suggested by Jason Wang, patch 5 introduces a new vhost
>        backend method: vhost_backend_get_vq_index().
>
>      - Use qemu_find_net_clients_except() at net/vhost-user.c for
>        gathering all related ncs so that we could register chr dev
>        event handler once. Which is also suggested by Jason Wang.
>
>
> Thanks.
>
>      --yliu
>
> ---
> Changchun Ouyang (2):
>    vhost-user: add multiple queue support
>    vhost-user: add a new message to disable/enable a specific virt queue.
>
> Michael S. Tsirkin (1):
>    vhost-user: add protocol feature negotiation
>
> Yuanhan Liu (4):
>    vhost-user: use VHOST_USER_XXX macro for switch statement
>    vhost: rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE
>    vhost-user: add VHOST_USER_GET_QUEUE_NUM message
>    vhost: introduce vhost_backend_get_vq_index method
>
>   docs/specs/vhost-user.txt         |  75 +++++++++++++++++++-
>   hw/net/vhost_net.c                |  39 ++++++++--
>   hw/net/virtio-net.c               |   8 +++
>   hw/virtio/vhost-backend.c         |  10 ++-
>   hw/virtio/vhost-user.c            | 143 +++++++++++++++++++++++++++++++------
>   hw/virtio/vhost.c                 |  20 +++---
>   include/hw/virtio/vhost-backend.h |   4 ++
>   include/hw/virtio/vhost.h         |   2 +
>   include/net/vhost_net.h           |   3 +
>   linux-headers/linux/vhost.h       |   2 +-
>   net/vhost-user.c                  | 146 +++++++++++++++++++++++++++-----------
>   qapi-schema.json                  |   6 +-
>   qemu-options.hx                   |   5 +-
>   tests/vhost-user-test.c           |   2 +-
>   14 files changed, 380 insertions(+), 85 deletions(-)
>