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From: John Baldwin <jhb@FreeBSD.org>
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Date: Thu, 6 Jan 2005 14:13:25 -0500
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cc: Randy Bush <randy@psg.com>
Subject: Re: panic in 2004.11.30 current
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On Sunday 12 December 2004 03:26 pm, Randy Bush wrote:
> db> trace
> Tracing pid 27 tid 100001 td 0xc155f180
> propagate_priority(c155f180,c17df900,c051705d,87,c05045f0) at
> propagate_priority+0x84 turnstile_wait(c0693a40,c17df900,7,4,d3f63cd4) at
> turnstile_wait+0x33c _mtx_lock_sleep(c0693a40,c155f180,0,0,0) at
> _mtx_lock_sleep+0xb4
> softclock(0,0,0,0,120003) at softclock+0x25a
> ithread_loop(c1551400,d3f63d48,0,0,0) at ithread_loop+0x1a8
> fork_exit(c04d7ee0,c1551400,d3f63d48) at fork_exit+0x7f
> fork_trampoline() at fork_trampoline+0x8
> --- trap 0x1, eip = 0, esp = 0xd3f63d7c, ebp = 0 ---
>
> # uname -a
> FreeBSD foo.bar.com 6.0-CURRENT FreeBSD 6.0-CURRENT #13: Tue Nov 30
> 20:38:02 GMT 2004     root@foo.bar.com:/usr/obj/usr/src/sys/foo  i386

You didn't say what the panic was, but probably some other code has a bug in 
that it went to sleep while holding the mutex 0xc0693a40, which WITNESS will 
tell you about if/when it happens.

-- 
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org