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Date:      Fri, 24 Dec 2004 19:21:37 +1100
From:      Peter Jeremy <PeterJeremy@optushome.com.au>
To:        Benjamin Lutz <benlutz@datacomm.ch>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: slow system freeze - panic
Message-ID:  <20041224082137.GA7189@cirb503493.alcatel.com.au>
In-Reply-To: <20041223170124.GA89886@midgard.intranet>
References:  <200412230408.48770.benlutz@datacomm.ch> <20041223170124.GA89886@midgard.intranet>

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On Thu, 2004-Dec-23 18:01:24 +0100, Benjamin Lutz wrote:
>Well, this is unexpected. I enabled the debugging options as instructed
>(INVARIANT_SUPPORT, INVARIANTS, WITNESS, DDB, GDB), rebooted and then
...
>ioapic0 <Version 1.1> irqs 0-23 on motherboard
>panic: spin lock rm.mutex_mtx not in order list

Hmm.  I can't find that string anywhere in the sources.  Are you sure
"rm.mutex_mtx" is correct?

>KDB: enter: panic
>[thread 0]
>Stopped at      kdb_enter+0x30: leave
>db> ps axl
>Symbol not found

Should be just "ps".  There's no point in this case because the system
panic'd before it finished booting.  Instead, run "trace" and post the
results.

I suggest you read ddb(4) and the developer's handbook URL that I posted.

>db> show witness
>(too much info for me to type (haven't got the serial console running
>yet, I can however not find any mention of an rm mutex)

One option in this case is to take a photo and put it up on the web
somewhere.

-- 
Peter Jeremy



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