Date: Tue, 24 Aug 2004 10:02:30 -0400 (EDT) From: Robert Watson <rwatson@FreeBSD.org> To: Lukas Ertl <le@FreeBSD.org> Cc: freebsd-current@FreeBSD.org Subject: Re: PLEASE TEST: IPI deadlock avoidance patch Message-ID: <Pine.NEB.3.96L.1040824100152.89999B-100000@fledge.watson.org> In-Reply-To: <20040824141238.K3016@pcle2.cc.univie.ac.at>
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On Tue, 24 Aug 2004, Lukas Ertl wrote: > On Mon, 23 Aug 2004, Lukas Ertl wrote: > > > On Sun, 22 Aug 2004, Doug White wrote: > > > >> 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 > > > > Looks good here - several of my Xeon boxes that were subject to deadlocks > > have survived -j4 buildworlds and other load situations with this patch. > > OK, it seems I shouted out too early. '-jX' buildworlds go fine, but my > news server (heavy disk and network traffic) still locks up within one > day of uptime. It's a Dual Xeon with HTT, SCHED_4BSD, ADAPTIVE_GIANT, > and no WITNESS or INVARIANTS. Using a serial break, are you able to get into the debugger on hang? If not, have you tried SW_WATCHDOG or MP_WATCHDOG? Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Principal Research Scientist, McAfee Research
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