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Re: [Qemu-devel] [PATCH 0/4] libvhost-user: VHOST_USER_PROTOCOL_F_MQ sup


From: Stefan Hajnoczi
Subject: Re: [Qemu-devel] [PATCH 0/4] libvhost-user: VHOST_USER_PROTOCOL_F_MQ support
Date: Wed, 3 Jul 2019 10:20:07 +0100
User-agent: Mutt/1.12.0 (2019-05-25)

On Fri, Jun 21, 2019 at 10:40:01AM +0100, Stefan Hajnoczi wrote:
> Sebastien Boeuf <address@hidden> pointed out that libvhost-user
> doesn't advertise VHOST_USER_PROTOCOL_F_MQ.  Today this prevents 
> vhost-user-net
> multiqueue from working.
> 
> In virtio-fs we also want to support multiqueue so I'm sending patches to add
> this.  It's free to advertise VHOST_USER_PROTOCOL_F_MQ for all devices so we
> can do it unconditionally in libvhost-user.
> 
> Several related improvements are included:
> Patch 1 - clean up duplicated and risky VhostUserMsg reply building code
> Patch 2 - remove hardcoded 8 virtqueue limit in libvhost-user
> Patch 4 - clarify vhost-user multiqueue specification
> 
> Stefan Hajnoczi (4):
>   libvhost-user: add vmsg_set_reply_u64() helper
>   libvhost-user: support many virtqueues
>   libvhost-user: implement VHOST_USER_PROTOCOL_F_MQ
>   docs: avoid vhost-user-net specifics in multiqueue section
> 
>  contrib/libvhost-user/libvhost-user-glib.h |  2 +-
>  contrib/libvhost-user/libvhost-user.h      | 10 +++-
>  contrib/libvhost-user/libvhost-user-glib.c | 12 +++-
>  contrib/libvhost-user/libvhost-user.c      | 65 +++++++++++++---------
>  contrib/vhost-user-blk/vhost-user-blk.c    | 16 +++---
>  contrib/vhost-user-gpu/main.c              |  9 ++-
>  contrib/vhost-user-input/main.c            | 11 +++-
>  contrib/vhost-user-scsi/vhost-user-scsi.c  | 21 +++----
>  tests/vhost-user-bridge.c                  | 42 +++++++++-----
>  docs/interop/vhost-user.rst                | 21 +++----
>  10 files changed, 132 insertions(+), 77 deletions(-)
> 
> -- 
> 2.21.0

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