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Date:      Fri, 7 Sep 2001 14:35:33 +0300
From:      Peter Pentchev <roam@ringlet.net>
To:        webmaster <webmaster@donfishback.com>
Cc:        freebsd-bugs@FreeBSD.ORG
Subject:   Re: Dual AMD 1.2Ghz  MP and 760 chipset
Message-ID:  <20010907143533.A8131@ringworld.oblivion.bg>
In-Reply-To: <KKEDJAMJCHBEINDLGJGGAENKDCAA.webmaster@donfishback.com>; from webmaster@donfishback.com on Thu, Sep 06, 2001 at 09:06:32PM -0400
References:  <KKEDJAMJCHBEINDLGJGGAENKDCAA.webmaster@donfishback.com>

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On Thu, Sep 06, 2001 at 09:06:32PM -0400, webmaster wrote:
> I just setup a new server with the Tyan Thunder K7 motherboard which uses
> the 760 chipset and Dual 1.2Ghz 'MP' AMD Athlons.  I recompiled the
> Stable-4.3 Kernel with SMP support and the server locks up at least once per
> hour.  The system is stable when I am running the Kernel in a single
> processor mode but I didn't pay for that extra processor to sit in the box
> unused.  Does anyone have any ideas?

When the system locks up, can you invoke the kernel debugger (ddb) by
pressing Ctrl-PrtScr?  (You need a kernel compiled with 'options DDB'
for that.)  If you can, could you set a crash dump device by setting
the dumpdev variable in /etc/rc.conf to a suitable partition (your swap
partition would probably do fine, if it is at least as large as your
machine's physical memory), then, upon crashing, escape to ddb and
give it a 'panic' command?  Then you should follow the instructions
at http://www.FreeBSD.org/handbook/kerneldebug.html and post the information
obtained from the crash dump.

If this is a SMP-related lockup, it is a bit unlikely that the system
would allow you to invoke the debugger; still, it would be worth a try..

G'luck,
Peter

-- 
This inert sentence is my body, but my soul is alive, dancing in the sparks of your brain.

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