[Gluster-users] RDMA/Ethernet wi ROCEE - failed to modify QP to RTR

Amar Tumballi amar at gluster.com
Mon Nov 14 16:43:14 UTC 2011

Hi Ben,

Did any RDMA/Ethernet users see this Gluster error?  If so do you know what
> caused it and how to fix?  If you haven't seen it, what RPMs and
> configuration do you use specific to RDMA/Ethernet?
We haven't tested Gluster with RDMA/Ethernet till date. If you have the
setup, can you try testing with master branch code with below patches
applied. (apply the patches in order).


Let us know if it works for you with these patches.


> [2011-11-10 10:30:20.595801] C
> [rdma.c:2417:rdma_connect_qp]0-rpc-transport/rdma: Failed to modify QP to
> [2011-11-10 10:30:20.595930] E [rdma.c:4159:rdma_handshake_pollin]
> 0-rpc-transport/rdma: rdma.management: failed to connect with remote QP
> I see this when I run RDMA over Ethernet using ROCEE RPMs, but when I run
> over Infiniband using RHEL 6.2-, it runs fine.  On the same Ethernet
> configuration, Gluster/TCP runs fine, NFS/RDMA runs fine as does AMQP app.
>  But qperf and rping utilities fail in the same way.  Firmware on the HCAs
> is not the latest, is it worth risk to upgrade?
> I went into debugger and found line where qperf fails, it's near line 2056
> in rdma.c in qperf sources (qperf-debuginfo,  I did Makefile)
> (gdb)
> 2088        } else if (dev->trans == IBV_QPT_RC) {
> (gdb)
> 2090            flags = IBV_QP_STATE              |
> (gdb)
> 2097            if (ibv_modify_qp(dev->qp, &rtr_attr, flags) != 0)
> (gdb)
> 2098                error(SYS, "failed to modify QP to RTR");
> (gdb)
> Gluster fails in rdma_connect_qp() calling the same routine, but perhaps
> with different parameters.
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