Subject: Re: [PATCH bpf-next v2 5/8] libbpf, xsk: select AF_XDP BPF program based on kernel version

From: Toke Høiland-Jørgensen <[email-masked]>
Date: Wed, 20 Jan 2021 13:52:51 +0100

Björn Töpel <[email-masked]> writes:

> From: Björn Töpel <[email-masked]>
>
> Add detection for kernel version, and adapt the BPF program based on
> kernel support. This way, users will get the best possible performance
> from the BPF program.

Please do explicit feature detection instead of relying on the kernel
version number; some distro kernels are known to have a creative notion
of their own version, which is not really related to the features they
actually support (I'm sure you know which one I'm referring to ;)).

-Toke