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Date:      Sat, 21 Sep 2013 11:31:03 -0500
From:      Bryan Drewery <bdrewery@FreeBSD.org>
To:        freebsd-current@freebsd.org
Subject:   Re: Panic on head (r255759) [_callout_stop_safe()-> panic: Lock lle not exclusively locked @ /usr/src/sys/kern/kern_rwlock.c:140]
Message-ID:  <523DC9C7.1020708@FreeBSD.org>
In-Reply-To: <523DC6D1.6050903@egr.msu.edu>
References:  <523D8AAD.5080900@FreeBSD.org> <alpine.BSF.2.00.1309211205160.4210@ai.fobar.qr> <523D8C39.4050307@FreeBSD.org> <20130921145139.23e3007a@thor.walstatt.dyndns.org> <CACYV=-FXZwzHgBkRPFay4Ktx3H-DKOmfmTpVKe4Z4VTnWmAm0g@mail.gmail.com> <523DC6D1.6050903@egr.msu.edu>

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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@zedat.fu-berlin.de> wrote:
>>> On Sat, 21 Sep 2013 07:08:25 -0500
>>> Bryan Drewery <bdrewery@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 @
>>>>>>> /usr/src/sys/kern/kern_rwlock.c:140
>>>>>>>
>>>>>>> cpuid =3D 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 =3D 0, rsp =3D 0xfffffe118aeefcb0, rbp =3D 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 th=
e
>>>> 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.


--=20
Regards,
Bryan Drewery


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