Re: [RFC PATCH bpf-next v3 2/2] selftests/livepatch: update test-ftrace.sh for deprecated ftrace_enabled

Steven Rostedt <[email protected]> Thu, 6 Aug 2026 20:51:44 -0400

Newsgroups	org.kernel.vger.linux-trace-kernel,org.kernel.vger.bpf,org.kernel.vger.live-patching,org.kernel.vger.stable
Message-ID	<[email protected]>

On Thu, 6 Aug 2026 17:45:00 -0400
Andrey Grodzovsky <[email protected]> wrote:

> > Since the selftests are shipped with the kernel code, I think
> > we don't need to handle backward compatibility here. Instead,
> > we can just assume disabling ftrace is no longer supported.

Incorrect.

> >
> > Thanks,
> > Song  
> 
> I tend to agree but I think here[1] Steve and Miroslav asked for
> backward compatability. V1 was actually the way you prefer.

Right. We test older kernels (think LTS) with newer testing environments.
We need them to be backward compatible.

-- Steve