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Date:      Mon, 23 Nov 1998 17:41:26 -0500 (EST)
From:      Chuck Robey <chuckr@mat.net>
To:        Steve Kargl <sgk@troutmask.apl.washington.edu>
Cc:        "Jordan K. Hubbard" <jkh@zippy.cdrom.com>, rom_glsa@ein-hashofet.co.il, current@FreeBSD.ORG
Subject:   Re: Random craches under heavy(?) disk activity
Message-ID:  <Pine.BSF.4.05.9811231736280.302-100000@picnic.mat.net>
In-Reply-To: <199811232226.OAA24221@troutmask.apl.washington.edu>

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On Mon, 23 Nov 1998, Steve Kargl wrote:

> According to Jordan K. Hubbard:
> > > I too have been experiencing random
> > > reboots, with no apparent reason.
> > 
> > I see an apparent reason.  Keep reading.
> > 
> > > My machine is a Pentium 200Mhz overclocked to 233Mhz,
> > 
> > Stop that.  At least until your system is 100% stable and does not
> > exhibit any symptoms which can be clearly traced to software.
> > 
> 
> Jordan,
> 
> First, I agree he should stop overclocking.  But, there really
> is a *subtle* bug.  I've 4 to 5 crashes, but I haven't been
> able to get a dump.
> 
> I've created and deleted 100's of MB of files (e.g., several 
> make worlds).  Then, on a seeming idle system, simply reading
> email can cause the problem.

Jordan didn't mean that, but he was completely correct (and should go on
being stubborn about it).  There's nothing worse, in doing
troubleshooting, than making an assumption and going off into a blind
alley for weeks, and trying to find a software problem in a system
that's being overclocked is simply asking for it.  Part of the price you
pay for overclocking is needing to dial back the clock for any serious
troubleshooting.  Overclocking is basically unreliable; if it works,
that's just fine, but the guarantee runs 60 seconds, max.

The problem's real, but no trouble reports if you're overclocking, no
excuses accepted.  It's not all that hard to dial the clock back (and
no, I don't overclock, myself, even though I do have a system that could
do that well).

----------------------------+-----------------------------------------------
Chuck Robey                 | Interests include any kind of voice or data 
chuckr@glue.umd.edu         | communications topic, C programming, and Unix.
213 Lakeside Drive Apt T-1  |
Greenbelt, MD 20770         | I run Journey2 and picnic (FreeBSD-current)
(301) 220-2114              | and jaunt (NetBSD).
----------------------------+-----------------------------------------------





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