buildworld panic on ia64

[Dan Nelson]

In the last episode (Jul 07), Anton Shterenlikht said:
> On Tue, Jul 07, 2009 at 09:45:54AM -0500, Dan Nelson wrote:
> > In the last episode (Jul 07), Anton Shterenlikht said:
> > > On Tue, Jul 07, 2009 at 11:50:58AM +0200, Rink Springer wrote:
> > > > On Tue, Jul 07, 2009 at 10:48:08AM +0100, Anton Shterenlikht wrote:
> > > > > panic: mtx_lock_spin() of destroyed mutex @ /usr/src/sys/ia64/ia64/trap.c:680
> > > > > cpuid = 0
> > > > > KDB: enter: panic
> > > > > [thread pid 67078 tid 100097 ]
> > > > > Stopped at      kdb_enter+0x92: [I2]    addl r14=0xffffffffffe2a8e8,gp ;;
> > > > 
> > > > Do you have a backtrace ?
> > > 
> > > no, sorry, I was too quick to reboot.  I tried to reproduce the error,
> > > got this on the way:
> > 
> > If you add "options KDB_TRACE" to your kernel config, you'll get a stack
> > trace automatically on every panic.
> 
> actually, I'll rebuild a kernel first, and then try to rebuid world.  I'll
> put this in as well.  Do I still need
> 
> options         KDB             # Enable kernel debugger support
> 
> if I put options KDB_TRACE?

I always have both, so I don't know if one requires the other.  You should
get a compile error if KDB is required and it's not listed.

-- 
	Dan Nelson
	dnelson at allantgroup.com