Re: Back-patch use of unnamed POSIX semaphores for Linux?

On Wed, Dec 7, 2016 at 3:12 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
>> On Tue, Dec 6, 2016 at 11:54 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>>> Robert Haas <robertmhaas@gmail.com> writes:
>>>> On Tue, Dec 6, 2016 at 9:53 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>>>>> I think we should give serious consideration to back-patching commit
>>>>> ecb0d20a9, which changed the default semaphore type to unnamed-POSIX
>>>>> on Linux.
>
>>>> Urk.  That sounds like a scary thing to back-patch.
>
>>> I don't deny that it's scary, but the alternative seems to be to be
>>> rather badly broken on systemd-using distros for years to come.
>>> That's pretty scary too.
>
>> Why can't this be configurable?
>
> It already is.  Note that I said "default".
>
> As things stand, it's only a configure-time choice, but I've been
> thinking that we might be well advised to make it run-time configurable.

Sure.  A configure-time choice only benefits people who are compiling
from source, which as far as production is concerned is almost nobody.

-- 
Robert Haas
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