Re: Soft-RoCE in qemu on CentOS 7?

[Matthias Leopold]

Am 24.11.20 um 15:10 schrieb Matthias Leopold:
> Hi,
>
> I don't know if this really the right place to ask but I want to know if 
> Soft-RoCE 
> (https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/networking_guide/sec-configuring_soft-_roce) 
> is supposed to work between VMs that are running in qemu on CentOS 7 
> hypervisor hosts.
>
> I found two posts which explain my problem (ibv_rc_pingpong fails with a 
> "Failed to modify QP to RTR"):
> https://lists.openfabrics.org/pipermail/users/2019-May/000729.html (he's 
> probably using Virtualbox)
> https://mymellanox.force.com/mellanoxcommunity/s/feed/0D51T00006jCUWYSA4
>
> I also found this:
> https://github.com/qemu/qemu/blob/master/docs/pvrdma.txt
> which I can't use at the moment, but I'm not even sure I would really 
> need this.
> I would be happy if someone could just confirm if "Soft-RoCE in qemu on 
> CentOS 7" works or not.
>
> thank you very much
> Matthias

it turns out that my problem is not virtualization related. when using 
"ibv_rc_pingpong -d rxe0 -g 1" instead of "ibv_rc_pingpong -d rxe0 -g 0" 
everything is fine.

matthias