Re: 6.0-BETA2 DRM/witness panic: Assertion j < 1000 failed at /usr/src/sys/kern/subr_witness.c:1513

From: Kris Kennaway <kris_at_obsecurity.org>
Date: Thu, 29 Sep 2005 12:35:41 -0400
On Thu, Sep 29, 2005 at 05:32:03PM +0100, Gavin Atkinson wrote:
> On Thu, 2005-09-29 at 17:24 +0100, Gavin Atkinson wrote:
> > On Thu, 2005-09-29 at 12:10 -0400, John Baldwin wrote:
> > > On Tuesday 09 August 2005 12:02 pm, Gavin Atkinson wrote:
> > > > On Tue, 2005-08-09 at 10:50 -0400, John Baldwin wrote:
> > > > > On Tuesday 09 August 2005 07:57 am, Gavin Atkinson wrote:
> > > > > > Hi,
> > > > > >
> > > > > > I have a regular panic (3 times a day) on a system running 6.0-BETA2
> > > > > > which was very stable under 5.4. dmesg available at
> > > > > > http://www.devrandom.co.uk/freebsd/dmesg-buffy-20050809 . The panic
> > > > > > seems to relate to DRM, I have a ATI Radeon QY RV100 7000/VE card.
> > > > >
> > > > > Do a 'show witness', it looks like witness has a cycle somehow.  Normally
> > > > > these can only occur if there is a cycle in the static lock order.
> > > >
> > > > http://www.devrandom.co.uk/freebsd/sh-witness-buffy-20050809
> > > >
> > > > Gavin
> > > 
> > > Do you still get this panic on more recent 6.0?
> > 
> > I do with BETA3 from Sept 6th.  I'll update again (after re-adding
> > WITNESS etc to GENERIC) and test it again. 
> 
> I should have said that I also stepped back in time several times, and
> was still getting the panic with kernel from sources dated April 15th,
> ruling out the major DRM upgrade in July.  I couldn't get any of the
> screensavers that easily provoke the panic to run on a pre-April 15th
> system, even after recompiling all ports.

You're not using modules, right?  Or at least, you're remembering to
recompile them all each time you update your kernel?

Kris
Received on Thu Sep 29 2005 - 14:35:48 UTC

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