Re: Panic on head (r255759) [_callout_stop_safe()-> panic: Lock lle not exclusively locked @ /usr/src/sys/kern/kern_rwlock.c:140]

On Sat, Sep 21, 2013 at 9:31 AM, Bryan Drewery <bdrewery_at_freebsd.org> wrote:
> On 9/21/2013 11:18 AM, Adam McDougall wrote:
>> On 09/21/13 09:41, Davide Italiano wrote:
>>> On Sat, Sep 21, 2013 at 2:51 PM, O. Hartmann
>>> <ohartman_at_zedat.fu-berlin.de> wrote:
>>>> On Sat, 21 Sep 2013 07:08:25 -0500
>>>> Bryan Drewery <bdrewery_at_FreeBSD.org> wrote:
>>>>
>>>>> On 9/21/2013 7:06 AM, Bjoern A. Zeeb wrote:
>>>>>> On Sat, 21 Sep 2013, Bryan Drewery wrote:
>>>>>>
>>>>>>>> Unread portion of the kernel message buffer:
>>>>>>>> panic: Lock lle not exclusively locked _at_
>>>>>>>> /usr/src/sys/kern/kern_rwlock.c:140
>>>>>>>>
>>>>>>>> cpuid = 0
>>>>>>>> KDB: stack backtrace:
>>>>>>>> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
>>>>>>>> 0xfffffe118aeef820
>>>>>>>> kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe118aeef8d0
>>>>>>>> vpanic() at vpanic+0x126/frame 0xfffffe118aeef910
>>>>>>>> panic() at panic+0x43/frame 0xfffffe118aeef970
>>>>>>>> __rw_assert() at __rw_assert+0xa3/frame 0xfffffe118aeef980
>>>>>>>> _callout_stop_safe() at _callout_stop_safe+0x54/frame
>>>>>>>> 0xfffffe118aeef9f0 arptimer() at arptimer+0x14e/frame
>>>>>>>> 0xfffffe118aeefa30 softclock_call_cc() at
>>>>>>>> softclock_call_cc+0x188/frame 0xfffffe118aeefb10 softclock() at
>>>>>>>> softclock+0x47/frame 0xfffffe118aeefb30
>>>>>>>> intr_event_execute_handlers() at
>>>>>>>> intr_event_execute_handlers+0x93/frame 0xfffffe118aeefb70
>>>>>>>> ithread_loop() at ithread_loop+0xa6/frame 0xfffffe118aeefbb0
>>>>>>>> fork_exit() at fork_exit+0x84/frame 0xfffffe118aeefbf0
>>>>>>>> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe118aeefbf0
>>>>>>>> --- trap 0, rip = 0, rsp = 0xfffffe118aeefcb0, rbp = 0 ---
>>>>>>
>>>>>> +1 from me;  I  guess introduced somwhere between 255569 and 255758,
>>>>>> as these are my edges of kernel.old and kernel.
>>>>>>
>>>>> r255726 was stable for me. r255759 is not.
>>>>>
>>>>> r255755 converted ipfilter to callout, but I am unsure if that is the
>>>>> problem.
>>>>>
>>>> r255729 is also stable for me - I'm with r255729 again, since r255757
>>>> crashed.
>>> Let me know if this fixes the problem for you:
>>> http://people.freebsd.org/~davide/review/lc_calloutfix.diff
>>>
>>> Thanks,
>>>
>> Worked for me so far. I generally couldn't stay up more than 30 minutes
>> before the patch and now my uptime is 90 minutes. Thanks!
>
> Same here.
>
>
> --
> Regards,
> Bryan Drewery
>

I would wait another couple of hours before the commit, but still I'm
confident this fixed the problem.

-- 
Davide

"There are no solved problems; there are only problems that are more
or less solved" -- Henri Poincare