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Date: Thu, 10 May 2007 21:19:29 -0400
From: Kris Kennaway <kris@obsecurity.org>
To: Scott Swanson <scotts@inetz.com>
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Cc: freebsd-stable@freebsd.org, Kris Kennaway <kris@obsecurity.org>
Subject: Re: panic: spin lock held too long (w/ backtrace)
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On Thu, May 10, 2007 at 07:13:51PM -0600, Scott Swanson wrote:
> Kris Kennaway wrote:
> > On Thu, May 10, 2007 at 07:00:00PM -0600, Scott Swanson wrote:
> > 
> >>>> Unread portion of the kernel message buffer:
> >>>> spin lock smp rendezvous held by 0xc95a5900 for > 5 seconds
> >>> What is thread 0xc95a5900 doing?
> >>>
> >>> Kris
> >>>
> >> Is this the best way to determine the action of the thread?
> >>
> >> Regards;
> >> Scott
> >>
> >> (kgdb) info threads
> >>   90 Thread 100123 (PID=18303: bsdtar)  0xc0644f5b in sched_switch
> >> (td=0xc95a5900, newtd=0xc92aad80, flags=0) at
> >> /usr/src/sys/kern/sched_4bsd.c:973
> > 
> > Yes, now 'proc 18303' and 'bt'.
> > 
> > Kris
> 
> 
> (kgdb) proc 18303
> (kgdb) bt
> #0  0xc0644f5b in sched_switch (td=0xc95a5900, newtd=0xc92aad80,
> flags=0) at /usr/src/sys/kern/sched_4bsd.c:973
> #1  0xeaa6dcb4 in ?? ()
> #2  0x00000001 in ?? ()
> #3  0x0ee2c000 in ?? ()
> #4  0x00000000 in ?? ()
> #5  0x00004000 in ?? ()
> #6  0x00000000 in ?? ()
> #7  0x00000000 in ?? ()
> #8  0xc95a5900 in ?? ()
> #9  0xeaa6dd30 in ?? ()
> #10 0xc081a8fb in syscall (frame=Cannot access memory at address 0x4008
> ) at /usr/src/sys/i386/i386/trap.c:983
> Previous frame inner to this frame (corrupt stack?)

Garbage :(  Are you using any modules?

Kris