panic: stable/10 with Debugging enabled in kern_cons.c:500

[Sean Bruno]

On Sat, 2014-01-11 at 22:15 -0500, Adam McDougall wrote:
> On 01/11/2014 17:44, Sean Bruno wrote:
> > On Sat, 2014-01-11 at 14:12 -0800, Sean Bruno wrote:
> >> I can't imagine that I'm the first person to run with the following
> >> debug options enabled:
> >>
> >> http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-deadlocks.html
> >>
> >> But, I can't get stable/10 to post on a plain old supermicro box with
> >> those debugging symbols enabled.  
> >>
> >> random: unblocking device.
> >> panic: mtx_lock_spin: recursed on non-recursive mutex cnputs_mtx
> >> @ /usr/src/sys/kern/kern_cons.c:500
> >>
> > 
> > Witness induced.  Removed the witness option and this doesn't happen
> > (obviously).  Can I get someone familiar with console code to look into
> > this?  Kind of crappy when I'm investigating a resource starvation
> > issue.
> > 
> > sean
> > 
> 
> Confirmed panic in 10-r258899M (20131203) on XenServer.  For reference,
> what is your rev?


Pretty close to top of tree stable/10 260555

sean