Subject: bug#46229: rdma-core 33.x breaks InfiniBand support in Open MPI

From: Ludovic Courtès <[email-masked]>
Date: Mon, 01 Feb 2021 11:13:07 +0100

Ludovic Courtès <[email-masked]> skribis:

> $ guix time-machine --commit=23a5dcce1d893b8f5c5301ae3c1af863776ed3cf --  environment --pure --ad-hoc openmpi openssh intel-mpi-benchmarks --with-debug-info=rdma-core -- mpiexec -np 2 IMB-MPI1 PingPong

A workaround is to ask Open MPI to ignore the Verbs library with:

  mpiexec --mca btl ^openib …

Ludo’.