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From: John Baldwin <jhb@freebsd.org>
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	(bigwig.baldwin.cx); Thu, 02 Aug 2012 16:58:42 -0400 (EDT)
Cc: "attilio@freebsd.org" <attilio@freebsd.org>,
	Sean Bruno <seanbru@yahoo-inc.com>
Subject: Re: [stable 9] panic on reboot: ipmi_wd_event()
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On Wednesday, August 01, 2012 6:48:48 pm Sean Bruno wrote:
> On Wed, 2012-08-01 at 05:53 -0700, John Baldwin wrote:
> > Index: vfs_subr.c
> > ===================================================================
> > --- vfs_subr.c  (revision 238969)
> > +++ vfs_subr.c  (working copy)
> > @@ -1868,8 +1868,11 @@ sched_sync(void)
> >                                 continue;
> >                         }
> >  
> > -                       if (first_printf == 0)
> > +                       if (first_printf == 0) {
> > +                               mtx_unlock(&sync_mtx);
> >                                 wdog_kern_pat(WD_LASTVAL);
> > +                               mtx_lock(&sync_mtx);
> > +                       }
> >  
> >                 }
> >                 if (!LIST_EMPTY(gslp)) {
> > 
> > 
> > -- 
> > John Baldwin 
> 
> This definitely makes the panic go away on reboot.

Do you have watchdogd enabled at all?

-- 
John Baldwin