Re: [virtio-dev] Re: [RFC] Virtio RDMA

[Leon Romanovsky <leon@kernel.org>]

On Wed, Feb 16, 2022 at 03:13:11PM +0800, Junji Wei wrote:
> 

<...>

> >> We can't. So do you mean we can implement virtio-rdma only for IB in the future?
> > 
> > It's probably virtio-IB but we need to listen to others.
> 
> Agreed, one problem is that there might be some duplicated works.

Once it will be needed, the code can be refactored. IB and RoCE are
different from user perspective, so combining them into one virtio-rdma
module doesn't give too much advantage.

> 
> > 
> >> 
> >>>> And currently virtio-rdma doesn't have a strong dependency on
> >>>> virtio-net (except for gid and ah stuffs). Is it OK to mix them up?
> >>> 
> >>> There are a bunch of hardware vendors that ship a converged Ethernet
> >>> adapter. It simplifies the management and deployment.
> >> 
> >> Virtio-rdma is not depend on virtio-net, we can bind it to another ethernet device
> >> via mac address in the future. And is it too mass to mix up two different device
> >> in one spec?
> > 
> > So either should be fine, we just need to figure out which one is
> > better. What I meant is to extend the virtio-net to be capable of
> > converged ethernet.
> 
> Got it. One question is whether there will be some cases that user want
> to use virtio-rdma binding to other types of ethernet device such as
> passthroughed net device. In this case, we don’t need a virtio-net
> device actually.

What is the use case for this virtio-rdma? Especially in context of RXE.

Thanks

> 
> Thanks.
>