DragonFly bugs List (threaded) for 2004-01
Re: panic during 'cvs -R -d /home/dcvs/ checkout src'
On Mon, 26 Jan 2004 20:35:41 -0800 (PST)
Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx> wrote:
> :The machine's still sitting at that prompt, and I can leave it there
> :pretty much indefinately, so if anyone can make suggestions on how to
> :get useful information out of DDB, please do! Meanwhile I'm going to
> :read up on chapter 10 of the FreeBSD Developer's Handbook because
> it's:been quite a while since I've used a debugger in any
> Ok, first thing to do is 'show regi' (show registers). Pick the
> stack pointer and write it down.
> Then do a 'trace'.
Debugger(c9123bfc,c017142b,c02d3b4d,1010002,1000040) at Debugger+0x34
dumpmag(73252228,a2922,0,0,0) at dumpmag+0x1b9
I'm guessing that's not helpful.
> If the trace doesn't look good, try tracing with
> the stack pointer plus an offset of 4 and of 8. You should get a
> good trace. e.g. if the stack pointer were 0xdaaaaa08 you could
> try'trace 0xdaaaaa0c' and 'trace 0xdaaaaa10'.
db> trace 0xc9123be0
_end(c017142b,c02d3b4d,1010002,1000040) at 0xc9123bfc
_end(6f726577,645f6666,79616c65,72706b00,735f636f) at 0xc9123bfc
Surely that's also not useful.
Third time's the charm. I hope.
db> trace 0xc9123be4
panic(c02d3b4d) at panic+0x97
panic(c02d1fc0,10002,c94adfc0,c94ae02c,c9123c2c) at panic+0x97
lockmgr(c94c1a90,1010002,c94ae02c,c4824b00,c9123c38) at lockmgr+0x360
ufs_vnoperate(c9123c50) at ufs_vnoperate+0x15
vn_lock(c94adfc0,10002,c4824b00,c94adfc0,c94ae02c) at vn_lock+0x90
vget(c94adfc0,10002,c4824b00) at vget+0x97
ffs_vget(c9103530,c505,c9123cf4) at ffs_vget+0x22
process_worklist_item(0,0,0,0,c0b17ce4) at process_worklist_item+0x10d
softdep_process_worklist(0) at softdep_process_worklist+0x106
sched_sync(0,0,0,0,0) at sched_sync+0x17c
kthread_exit() at kthread_exit
> If you can get a crash dump that would be good to, typing 'panic'
> and hitting return once or twice will get you there. but if you
> haven't already set it up there nothing you can do about it now
> and that will reboot the machine.
Yeah, unfortunately not... I'll set it up for next time and see if I
can't reproduce this by running cvs checkout again.
> I've seen this type of crash before, but have not yet been able to
> track it down.
> Matthew Dillon
Well, I hope this helps in some small way. Thanks for guiding me