Hi,
On 2023-02-06 19:51:19 +0100, Tomas Vondra wrote:
> > No. The only thing the machine is doing is
> >
> > while /usr/bin/true; do
> > make check
> > done
> >
> > I can't reduce the workload further, because the "join" test is in a
> > separate parallel group (I cut down parallel_schedule). I could make the
> > machine busier, of course.
> >
> > However, the other lockup I saw was when using serial_schedule, so I
> > guess lower concurrency makes it more likely.
> >
>
> FWIW the machine is now on run ~2700 without any further lockups :-/
>
> Seems it was quite lucky we hit it twice in a handful of attempts.
Did you cut down the workload before you reproduced it the first time, or
after? It's quite possible that it's not reproducible in isolation.
Greetings,
Andres Freund