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SubjectRe: 2.6.39: crash w/threadirqs option enabled


On Fri, 20 May 2011, Thomas Gleixner wrote:

> On Fri, 20 May 2011, Justin Piszcz wrote:
>> On Fri, 20 May 2011, Thomas Gleixner wrote:
>>
>>> On Fri, 20 May 2011, Justin Piszcz wrote:
>>>> On Fri, 20 May 2011, Thomas Gleixner wrote:
>>>>> Does it crash right away or just when doing something particular?
>>>> It crashed at 2100, this is when I run a few I/O intensive processes:
>>>> - backup (dump ext4 filesystem -> to a separate raid device)
>>>> - backup (dump ext4 on remote host -> to separate raid device)
>>>> - backup (dump xfs on remote host -> to separate raid device)
>>>>
>>>> This looks like it is what caused it to crash.
>>>
>>> That narrows it down somewhat, but does not give us a clue at all :(
>>>
>>>>> Is the box fully dead after the crash ?
>>>> The host was online and I went away for awhile, when I came back the
>>>> system
>>>> had rebooted on its own (as I lost all of my X windows/etc).
>>>
>>> Hmm. Did you have panic_timeout set ?
>>
>> Hi,
>>
>> No, I do not use panic_timeout or any type of watchdog that would reboot
>> the system upon a lockup/crash.
>
> Yuck, that means it ran into a triple fault. Nasty. I have no idea how
> to debug that at the moment and I was not able to reproduce on one of
> my test systems. Maybe I need to try harder.
>
> Thanks,
>
> tglx
>
>
>
>

Hi,

Crashed again and it rebooted too:

reboot system boot 2.6.39 Thu Jun 9 23:58 - 04:05 (04:06)
user1 pts/0 X Thu Jun 9 19:25 - 19:30 (00:04)
user1 pts/10 X Thu Jun 9 18:23 - crash (05:35)

Any thoughts on what could be causing this?
Should I go back to 2.6.38?

Justin.



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