memory barriers (was: Yes, WaitLatch is vulnerable to weak-memory-ordering bugs)

On Mon, Aug 8, 2011 at 7:47 AM, Robert Haas <robertmhaas@gmail.com> wrote:
> I've been thinking about this too and actually went so far as to do
> some research and put together something that I hope covers most of
> the interesting cases.  The attached patch is pretty much entirely
> untested, but reflects my present belief about how things ought to
> work.

And, here's an updated version, with some of the more obviously broken
things fixed.

-- 
Robert Haas
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