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Re: Posix Shared Mem patch

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Magnus Hagander <magnus@hagander.net>
Cc: Robert Haas <robertmhaas@gmail.com>, Josh Berkus <josh@agliodbs.com>, pgsql-hackers@postgresql.org
Date: 2012-06-28T14:11:31Z
Lists: pgsql-hackers 
... btw, I rather imagine that Robert has already noticed this, but OS X
(and presumably other BSDen) spells the flag "MAP_ANON" not
"MAP_ANONYMOUS".  I also find this rather interesting flag there:

     MAP_HASSEMAPHORE  Notify the kernel that the region may contain sema-
                       phores and that special handling may be necessary.

By "semaphore" I suspect they mean "spinlock", so we'd better turn this
flag on where it exists.

			regards, tom lane