[linux-azure] Request to autoload mlx4/mlx5 modules for DPDK

[Joseph Salisbury]

Ubuntu 18.04 images in the marketplace do not automatically load the required mlx drivers. (mlx4_ib|mlx5_ib and mlx4_en|mlx5_en)

Someone trying DPDK on Ubuntu 18.04 has raised an issue on Azure DPDK document(https://github.com/MicrosoftDocs/azure-docs/issues/44303).

To reproduce, bring up an ubuntu 18.04 VM on Azure. There you can see only mlx4_en but not the other one(mlx4_ib):

# lsmod | grep mlx4
mlx4_en 118784 0
mlx4_core 294912 1 mlx4_en

We would expect there to be 4 kernel modules loaded such as:
mlx[4|5]_ib, rdma_cm, rdma_ucm, and ib_ipoib

[Marcelo Cerri (mhcerri)]

Hi, Joe.

I believe we can solve that by simply installing rdma-core by default on the azure images. I'm going to test that and coordinate with CPC, but do you have any restrictions to this approach? That should not require any changes to the current azure kernel.

[Joseph Salisbury (jsalisbury)]

Additional conversations for the bug are happening in bug 1874544