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

On Wed, Sep 14, 2011 at 4:29 PM, Robert Haas <robertmhaas@gmail.com> wrote:

> 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.
>

You declare dummy_spinlock variable as extren and use it, but it is not
defined anywhere. Wouldn't that be a linker error?

-- 
Gurjeet Singh
EnterpriseDB Corporation
The Enterprise PostgreSQL Company