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From: John Baldwin <jhb@freebsd.org>
To: Glen Barber <gjb@freebsd.org>
Date: Thu, 19 Jan 2012 11:23:06 -0500
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	(bigwig.baldwin.cx); Thu, 19 Jan 2012 11:41:28 -0500 (EST)
Cc: Attilio Rao <attilio@freebsd.org>, freebsd-current@freebsd.org
Subject: Re: [panic] intr_event_execute_handlers() - Corrupted DWARF
	expression
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On Thursday, January 19, 2012 11:02:57 am Glen Barber wrote:
> On Thu, Jan 19, 2012 at 10:50:45AM -0500, John Baldwin wrote:
> > On Wednesday, January 18, 2012 5:01:37 pm Glen Barber wrote:
> > > Hi,
> > > 
> > > I'm running -CURRENT from about 5 days ago:
> > > 
> > > nucleus# uname -a
> > > FreeBSD nucleus 10.0-CURRENT FreeBSD 10.0-CURRENT #3 r230037M: Fri Jan
> > > 13 17:48:14 EST 2012     gjb@nucleus:/usr/obj/usr/src/sys/NUCLEUS  amd64
> > > 
> > > (The 'M' is kib's DRM patches for Intel GPU.)
> > > 
> > > So far, I haven't had much problem with this laptop, but just had the
> > > machine panic.
> > > 
> > > I have kgdb output attached, and I'll be happy to provide whatever
> > > additional information that may be needed.
> > > 
> > > I have core.txt.N available here:
> > > 
> > >   http://people.freebsd.org/~gjb/core.txt
> > 
> > In kgdb, can you go to frame 6 and 'p td->td_lock'.  If that is non-null, can 
> > you do 'p *td->td_lock'?
> > 
> 
> Sure, script(1) output is attached.

Hmm, I don't think td->td_lock is ever supposed to be NULL.

-- 
John Baldwin