Re: [clocksource] 8c30ace35d: WARNING:at_kernel/time/clocksource.c:#clocksource_watchdog

[Thomas Gleixner]

Paul,

On Tue, Apr 27 2021 at 10:50, Paul E. McKenney wrote:
> On Tue, Apr 27, 2021 at 06:37:46AM -0700, Paul E. McKenney wrote:
>> I suppose that I give it (say) 120 seconds instead of the current 60,
>> which might be the right thing to do, but it does feel like papering
>> over a very real initramfs problem.  Alternatively, I could provide a
>> boot parameter allowing those with slow systems to adjust as needed.
>
> OK, it turns out that there are systems for which boot times in excess
> of one minute are expected behavior.  They are a bit rare, though.
> So what I will do is keep the 60-second default, add a boot parameter,
> and also add a comment by the warning pointing out the boot parameter.

Oh, no. This starts to become yet another duct tape horror show.

I'm not at all against a more robust and resilent watchdog mechanism,
but having a dozen knobs to tune and heuristics which are doomed to fail
is not a solution at all.

Thanks,

        tglx