Re: Undetected Deadlock

Michael Harris <harmic(at)gmail(dot)com> writes:
> On Mon, 7 Feb 2022 at 09:57, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> Do you want to try this and see if it actually adds any robustness with your buggy code?

> Sorry for the delayed response, & thanks for the patch.

> I wasn't able to test with our actual application because it could
> take days for it to actually trigger the problem, so I tested it with
> a simulation, which you can find here:

> https://github.com/harmic/pg_almloss

> With that simulation I could attach gdb to the backend and see that
> signal_pending & signal_due_at were being reset in the expected way,
> even when a missed interrupt was triggered.

> I'm convinced your patch improves robustness under the scenario we saw.

Great, thanks for testing!

regards, tom lane