Re: semaphore usage "port based"?

From: "Marc G(dot) Fournier" <scrappy(at)postgresql(dot)org>
To:
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: semaphore usage "port based"?
Date: 2006-04-03 04:24:33
Message-ID: 20060403012403.T947@ganymede.hub.org
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Thanks all ... have moved this to just the freebsd-stable list, since I
don't imagine most here are interested in FreeBSD :(

On Mon, 3 Apr 2006, Andrew Thompson wrote:

> 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
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>

----
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
Email: scrappy(at)hub(dot)org Yahoo!: yscrappy ICQ: 7615664

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