Re: [PATCH] net: add net namespace inode for all net_dev events

[Alexei Starovoitov]

On Tue, Mar 9, 2021 at 12:37 PM Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
>
> The size of the fields and order changes all the time in various events. I
> recommend doing so *all the time*. If you upgrade a kernel, then all the bpf
> programs you have for that kernel should also be updated. You can't rely on
> fields being the same, size or order. The best you can do is expect the
> field to continue to exist, and that's not even a guarantee.

+1. Tracing bpf progs already do that.
Old style tracing progs do it based on the kernel version.
New style is using CO-RE.