Re: [Qemu-devel] [RFC PATCH 2/4] vhost-user: add the vhost-user extension to support the vhost-pci based inter-vm communication

[Wei Wang]

On 11/10/2016 07:36 PM, Marc-André Lureau wrote:
> Hi
>
> On Thu, Nov 10, 2016 at 6:47 AM Wei Wang <address@hidden 
> <mailto:address@hidden>> wrote:
>
>     This is the slave part of vhost-user implemented in QEMU, with an
>     extension
>     to support vhost-pci.
>
>
> Instead of implementing "another vhost-user slave", it would be worth 
> investigating using libvhost-user instead 
> (https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg03990.html). 
> This is just a suggestion, it is quite fine for vhost-pci to have its 
> own smaller/specific vhost-user slave implementation (without virtio 
> rings handlings etc). (libvhost-user is also very young, not yet in 
> qemu, we should be able shape it for vhost-pci needs)
Thanks for the suggestion. It looks possible. I will need to investigate 
more about it.

libvhost-user is still at an initial stage and not in QEMU yet, I think 
we can probably have vhost-pci as an independent slave for now - this 
will not complicate libvhost-user when it's in the initial stage (it 
might not be good to make it a quite complex design at the beginning), 
and on the other side, the vhost-pci based slave implementation draft is 
already there. We can merge them if it is necessary when they both are 
stable in QEMU.  What do you think?

Best,
Wei