debugging frequent kernel panics on 8.2-RELEASE

[Andriy Gapon]

on 11/08/2011 14:39 Steven Hartland said the following:
> The trimmed down output, removed the 10,000's of ?? lines here:-
> http://blog.multiplay.co.uk/dropzone/freebsd/panic-2011-08-11-1402.txt
> 
> The raw output is here:-
> http://blog.multiplay.co.uk/dropzone/freebsd/panic-full-2011-08-11-1402.txt.bz2
> 
> I'm not sure how useful its going to be as pretty much all of it seems
> to be just:-
> #0  sched_tswitch (td=0xffffff00194d4460, newtd=0xffffff000a74a000, flags=Variable
> "flags" is not available.
> #1  0xffffffff80385c86 in mi_switch (flags=260, newtd=0x0) at
> /usr/src/sys/kern/kern_synch.c:449
> #2  0xffffffff803b8a0c in sleepq_catch_signals (wchan=0xffffff02f27c48c0, pri=92)
> at /usr/src/sys/kern/subr_sleepqueue.c:418
> #3  0xffffffff803b9326 in sleepq_wait_sig (wchan=Variable "wchan" is not available.
> #4  0xffffffff80386149 in _sleep (ident=0xffffff02f27c48c0,
> lock=0xffffff02f27c49b8, priority=Variable "priority" is not available.
> #5  0xffffffff8035079d in kern_wait (td=0xffffff00194d4460, pid=91362,
> status=0xffffff86cdbffabc, options=Variable "options" is not available.
> #6  0xffffffff80350e95 in wait4 (td=Variable "td" is not available.
> #7  0xffffffff803bb8e5 in syscallenter (td=0xffffff00194d4460,
> sa=0xffffff86cdbffba0) at /usr/src/sys/kern/subr_trap.c:315
> #8  0xffffffff80574a0b in syscall (frame=0xffffff86cdbffc40) at
> /usr/src/sys/amd64/amd64/trap.c:888
> #9  0xffffffff8055d242 in Xfast_syscall () at
> /usr/src/sys/amd64/amd64/exception.S:377
> 
> On one machine we had a little more info on console which may indicate
> java as the problem.
> 
> http://blog.multiplay.co.uk/dropzone/freebsd/panic-java.jpg

I would really appreciate if you could try to reproduce the problem with the patch
that I sent earlier.

-- 
Andriy Gapon