Re: [PATCH v3 16/17] selftests/verification: Rearrange the wwnr_printk test

[Gabriele Monaco <gmonaco@redhat.com>]

On Fri, 2026-07-10 at 08:18 +0200, Nam Cao wrote:
> Gabriele Monaco <gmonaco@redhat.com> writes:
> > Simplify the test and run the steps expecting no reaction before the one
> > expecting reactions.
> 
> This requirement is not clear from the code. I fear a new developer who
> wants to introduce a new test case will easily trip over this, or even
> us a few months from now.
> 
> Instead of this, how about each test case discards or ignores all
> previous reactions?

Fair points, the issue is that we are hammering wwnr, on some systems we may
still see printks for long after the monitor was disabled, I tried that grep -m1
trick to mitigate that.

To ignore all previous reactions reliably we need to wait for the buffers to
flush, something like waiting for a full second for nothing new on the
ringbuffer perhaps. I could think of that or at least make this more clear with
comments.

Thanks,
Gabriele