Re: Erroneous PPC spinlock code

Bruce Momjian <pgman@candle.pha.pa.us>

From: Bruce Momjian <pgman@candle.pha.pa.us>
To: Marcus Meissner <meissner@suse.de>
Cc: Reinhard Max <max@suse.de>, Tom Lane <tgl@sss.pgh.pa.us>, Peter Eisentraut <peter_e@gmx.net>, PostgreSQL Development <pgsql-hackers@postgresql.org>
Date: 2003-11-10T03:29:32Z
Lists: pgsql-hackers
Marcus Meissner wrote:
-- Start of PGP signed section.
> On Thu, Nov 06, 2003 at 12:08:56AM +0100, Reinhard Max wrote:
> > On Wed, 5 Nov 2003 at 13:28, Tom Lane wrote:
> > 
> > > Peter Eisentraut <peter_e@gmx.net> writes:
> > >
> > > > The SuSE PPC guru said that the PPC spinlock code we currently use
> > > > may behave erroneously on multiprocessor systems.
> > >
> > > What's his evidence for that claim?
> > 
> > Let's ask himself.
> > 
> > > The code we have is based directly on the recommendations in the PPC
> > > manuals, and has been tested on multi-CPU systems.
> > 
> > Marcus, can you explain the details, please?
> 
> I reviewed the documentation again (at:
> 	http://www-1.ibm.com/servers/esdd/articles/powerpc.html
> ) and it seems to agree with your opinion.
> 
> I retract my comment, leave your code as-is.

Cool.  Thanks for checking.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073