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Date:      Fri, 1 Aug 2003 13:04:16 +0200
From:      Tobias Roth <roth@iam.unibe.ch>
To:        Bruce Cran <bruce@cran.org.uk>
Cc:        current@freebsd.org
Subject:   Re: make buildworld: Signal 11; Illegal instruction
Message-ID:  <20030801110415.GA13918@speedy.unibe.ch>
In-Reply-To: <20030731205208.GA14443@buffy.brucec.backnet>
References:  <86he52r1b6.fsf@PECTOPAH.shenton.org> <86zniupli2.fsf@PECTOPAH.shenton.org> <20030731205208.GA14443@buffy.brucec.backnet>

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On Thu, Jul 31, 2003 at 09:52:08PM +0100, Bruce Cran wrote:
> On Thu, Jul 31, 2003 at 03:03:01PM -0400, Chris Shenton wrote:
> > Chris Shenton <chris@shenton.org> writes:
> > 
> > >   *** Signal 11
> > >... 
> > >   Illegal instruction (core dumped)
> > >   *** Error code 132
> > 
> > Also seeing
> > 
> > *** Signal 4
> > 
> > if it matters.  This sounds way too flakey to be SW.
> 
> I'm seeing the same symptoms.   I got a signal 4 when running 'clean' in the 
> pam authentication directory, and I've just had a signal 11 running 
> 'rm -f libradius.so'.  This is an install from a snapshot I built today - 
> during the install I had panics in _mtx_init_ and a backtrace traced through 
> vfs and ffs functions, and I only managed to install successfully when I 
> had the CPU throttled to 30%.  This is the same computer which ran memtest86
> for 8 hours without a single fault last night, so I doubt the hardware's 
> faulty, at least not the memory or the CPU.

memtest86 does not always catch memory errors. sig11 and sig4 at varying
locations during buildworld are a sure indicator for a hardware problem.
most likely a memory or overheating issue, though other hardware related
causes are possible.

if you still are not convinced that this is a hardware issue, run build-
world on a -stable system.

more and more latest generation laptops from different manufacturers show
these symptoms during hot days. my guess is that mobile pentium 4 systems
are just not as stable as they should. let's hope things get better with
the pentium m chips. are the manufaturers deploy better quality control to
catch the numerous faulty systems.



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