Re: semaphore usage "port based"?

On Sun, Apr 02, 2006 at 11:41:01PM -0400, Kris Kennaway wrote:
> On Mon, Apr 03, 2006 at 12:30:58AM -0300, Marc G. Fournier wrote:
> > 'k, but how do I fix kill so that it has the proper behaviour if SysV is
> > enabled?
>
> Check the source, perhaps there's already a way. If not, talk to
> whoever made the change.
>
> > Maybe a mount option for procfs that allows for pre-5.x
> > behaviour?
>
> procfs has nothing to do with this though.
>
> > I'm not the first one to point out that this is a problem, just
> > the first to follow it through to the cause ;( And I believe there is
> > more then just PostgreSQL that is affected by shared memory (ie. apache2
> > needs SysV IPC enabled, so anyone doing that in a jail has it enabled
> > also) ...
>
> Also note that SysV IPC is not the problem here, it's the change in
> the behaviour of kill() that is causing postgresql to become confused.
> That's what you should investigate.

The ESRCH error is being returned from prison_check(), that would be a
good starting place.

Andrew