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Date:      Mon, 6 Oct 2003 17:33:21 -0700
From:      Kris Kennaway <kris@obsecurity.org>
To:        Benjamin Lutz <lutzb@student.ethz.ch>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: lockup in FreeBSD 5.1
Message-ID:  <20031007003321.GA4043@rot13.obsecurity.org>
In-Reply-To: <20031006234415.7ee47ef4.lutzb@student.ethz.ch>
References:  <20031006234415.7ee47ef4.lutzb@student.ethz.ch>

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On Mon, Oct 06, 2003 at 11:44:15PM +0200, Benjamin Lutz wrote:

> The interesting thing is - today I was "watching" the machine with
> top, while she used it normaly (me = maxlor, her = theres). Below
> you find what top displayed before the machine went offline (I
> assume she powercycled it). The interesting thing is that multiple
> processes seem to be locked in Giant... could this be a driver
> issue?

Sort of..recall from the 5.1 Early Adopter's Guide that the 5.x branch
is work in progress and a major focus of effort is SMP locking
pushdown.  As of 5.1 Giant still covered a lot of the kernel code
paths.

> On the hardware side, we have an old K6 machine, with some NIC that
> uses the vr driver; the other stuff I can't remember right now.

k6 CPUs run notoriously hot and become unreliable at high
temperatures..make sure you have more-than-adequate CPU cooling.

Kris
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