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Re: Soft-RoCE in qemu on CentOS 7?

From: Matthias Leopold
Subject: Re: Soft-RoCE in qemu on CentOS 7?
Date: Mon, 30 Nov 2020 11:59:55 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

Am 24.11.20 um 15:10 schrieb Matthias Leopold:

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)

I also found this:
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

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.


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