Robert Haas <> writes:
> On Mon, Aug 14, 2017 at 12:16 PM, Tom Lane <> wrote:
>> Just FYI, the only values being reported by buildfarm animals are
>> "posix", "sysv", and "windows".  So while mmap may be a thing,
>> it's an untested thing.

> I'm pretty sure I dev-tested it before committing anything, but,
> certainly, having ongoing BF coverage woudn't be a bad thing.

Looking closer, the reason those are the only reported values is
that those are the only possible results from initdb's
choose_dsm_implementation().  So the real question here is whether
"mmap" should be considered to dominate "sysv" if it's available.
If so, why isn't choose_dsm_implementation() trying it; and if not,
why are we carrying it?

                        regards, tom lane

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