On 12.04.21 07:46, Craig Ringer wrote:
> > To use systemtap semaphores (the _ENABLED macros) you need to run
> dtrace
> > -g to generate a probes.o then link that into postgres.
> >
> > I don't think we do that. I'll double check soon.
>
> We do that. (It's -G.)
>
>
> Huh. I could've sworn we didn't. My mistake, it's there in
> src/backend/Makefile .
>
> In that case I'll amend the patch to use semaphore guards.
This whole thread is now obviously moved to consideration for PG15, but
I did add an open item about this particular issue
(https://wiki.postgresql.org/wiki/PostgreSQL_14_Open_Items, search for
"dtrace"). So if you could produce a separate patch that adds the
_ENABLED guards targeting PG14 (and PG13), that would be helpful.