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Date:      Fri, 28 Sep 2001 12:33:12 -0500
From:      Mike Meyer <mwm@mired.org>
To:        FreeBSD <freebsd@XtremeDev.com>
Cc:        questions@freebsd.org
Subject:   Re: General SMP lockup poll
Message-ID:  <15284.46168.720663.154713@guru.mired.org>
In-Reply-To: <42459266@toto.iv>

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FreeBSD <freebsd@XtremeDev.com> types:
> This is slightly off topic, but after talking to a few people on IRC, I
> want to know what people's experience with SMP are in FreeBSD-stable. So
> far, I've been having random hard lockups in FreeBSD-stable on a dual
> PPro200/1mb system on a Tyan TitanPro board atleast once a day since it's
> install (a week now). Someone I've talked to on IRC has had the same thing
> happening on a SMP celeron box that used to run NT/2K for many months
> without problems. The machine just hard locks, no warning and no pattern.
> Different times of the day and doing different things. It went through
> multiple buildworlds without a hitch, and has had no sigfaults. I'm trying
> now with a UP kernel to see if it still locks hard, but thought I'd email
> a general list and see what the general experience people had been having
> with SMP under FreeBSD-stable. Thanks.

Well, there's always at least one bug. Whether or not anyone will find
it is the question.

There's a known bug that causes hard lockups like that. It can be
reliably triggered by enabling plugins for gkrellm. It's assumed to be
an SMP problem, as all the problem reports for gkrellm are on SMP
systems. It was apparently introduced in early august, but that's not
positive. I haven't chased it down yet, as I've only had one other
lockup since this started happening.

	<mike
--
Mike Meyer <mwm@mired.org>			http://www.mired.org/home/mwm/
Q: How do you make the gods laugh?		A: Tell them your plans.

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