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From: Peter Wemm <peter@wemm.org>
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Date: Mon, 23 Aug 2004 14:41:00 -0700
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Subject: Re: PLEASE TEST: IPI deadlock avoidance patch
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On Monday 23 August 2004 02:00 pm, Pawel Worach wrote:
> Doug White wrote:
> > Hey folks,
> >
> > If you have a reasonably fast i386 or amd64 multiprocessor and/or
> > hyperthreading machine and are experiencing reproducible hangs
> > during -j buildwords and other highly parallel operations, please
> > try this patch:
> >
> > http://people.freebsd.org/~dwhite/smp_rv_mtx.patch
>
> Worked like a charm, Four way Xeon box with a -j256 buildstone using
> SCHED_ULE. Thanks for tracking this down!

Doug has been busy, so I committed it for him.   Its in -current as of a 
few seconds ago, and presumably will make its way to RELENG_5 soon.

Thanks to everybody for confirming the fix :-)
-- 
Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com
"All of this is for nothing if we don't go to the stars" - JMS/B5