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Subject: Re: [External] Re: [PATCH] Reserve device id for RDMA device


On Fri, Sep 24, 2021 at 9:50 PM Cornelia Huck <cohuck@redhat.com> wrote:
>
> On Thu, Sep 23 2021, Junji Wei <weijunji@bytedance.com> wrote:
>
> >> On Sep 22, 2021, at 7:28 PM, Cornelia Huck <cohuck@redhat.com> wrote:
> >>
> >> On Fri, Sep 03 2021, Junji Wei <weijunji@bytedance.com> wrote:
> >>
> >>> Use device ID 42
> >>>
> >>> Signed-off-by: Junji Wei <weijunji@bytedance.com>
> >>> ---
> >>> content.tex | 2 ++
> >>> 1 file changed, 2 insertions(+)
> >>>
> >>> diff --git a/content.tex b/content.tex
> >>> index 3aeb4a4..b57c997 100644
> >>> --- a/content.tex
> >>> +++ b/content.tex
> >>> @@ -2878,6 +2878,8 @@ \chapter{Device Types}\label{sec:Device Types}
> >>> \hline
> >>> 41         &   GPIO device \\
> >>> \hline
> >>> +42         &   RDMA device \\
> >>> +\hline
> >>> \end{tabular}
> >>>
> >>> Some of the devices above are unspecified by this document,
> >>
> >> Do we have an answer to the issues raised with the QEMU patches? IOW, is
> >
> > Yes.
> >
> >> it reasonable to expect that we can actually implement a usuable RDMA
> >> device? While device IDs are generally cheap, it would be good not to
> >> have too many dead entries.
> >
> > I think we can implement an usable RDMA device through uRDMA (a
> > software implementation of the RoCEv2 protocol in QEMU with VFIO
> > or DPDK).
>
> If nobody disagrees, we can start a vote.
>
> One last question: there were two patches, this one and the one linked
> in the issue... I think they are the same, right? (I do not trust myself
> on Friday afternoons.)
>

Yes, the first patch was rejected by the virtio-dev mail list because I was
not a subscriber, so I re-sent another one.

Thanks.
Junji


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