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

Robert Haas <robertmhaas(at)gmail(dot)com> wrote:

> I've also added a lengthy README file to the patch that attempts
> to explain how barriers should be used in PostgreSQL coding. It's
> certainly not a comprehensive treatment of the topic, but
> hopefully it's enough to get people oriented. I've attempted to
> tailor it a bit to PostgreSQL conventions, like talking about
> shared memory vs.backend-private memory instead of assuming (as a
> number of other discussions of this topic do) a thread model. It
> also includes some advice about when memory barriers shouldn't be
> used or won't work, and some references for further reading.

Thanks, that seems like it's at the right level of detail to me.

-Kevin