Obviously if you don't have driver support for the kernel you run, you can't use old stuff if you want to, but we had SDR IB running quite a long time without s

Obviously if you don't have driver support for the kernel you run, you can't use old stuff if you want to, but we had SDR IB running quite a long time without support. I don't have happy experience of HPC vendor support anyway, and unfortunately IB is now a Mellanox monoculture.