Re: Replace buffer I/O locks with condition variables (reviving an old patch)

On Fri, Feb 26, 2021 at 7:08 PM Thomas Munro <thomas.munro@gmail.com> wrote:
> Back in 2016, Robert Haas proposed to replace I/O locks with condition
> variables[1].  Condition variables went in and have found lots of
> uses, but this patch to replace a bunch of LWLocks and some busy
> looping did not.  Since then, it has been tested quite a lot as part
> of the AIO project[2], which currently depends on it.  That's why I'm
> interested in following up now.  I asked Robert if he planned to
> re-propose it and he said I should go for it, so... here I go.

I removed a redundant (Size) cast, fixed the wait event name and
category (WAIT_EVENT_BUFFILE_XXX is for buffile.c stuff, not bufmgr.c
stuff, and this is really an IPC wait, not an IO wait despite the
name), updated documentation and pgindented.