This section covers general troubleshooting and commonly reported problems.
The ibdiagnet program can be used to troubleshoot potential issues with your infiniband fabric.
ibstat or opensm hangs and the following kernel messages are printed:
kernel: [ 78.170077] ib0: ib_query_gid() failed kernel: [ 89.272789] ib0: ib_query_port failed
Fix: Load the mlx4_core module with the msi_x=0 option.
cat > /etc/modprobe.d/mlx4_core <<EOF options mlx4_core msi_x=0 EOF update-initramfs -u
If you see error messages pertaining to missing support for XRC, it means you have mis-matched kernel modules and userspace libraries.
Fix: Make sure that you build and install the OFED kernel modules as described in section X.
mlx4: There is a mismatch between the kernel and the userspace libraries: Kernel does not support XRC. Exiting.