Thanks for the advice! I've upgraded to 2.6.28-rc9 and turned off PREEMPT.
Now two days passed, and yet to see one crash. So far so good! I'll report
back after a longer period of testing.

Regards,
Paul Liu

On 12/22/08, Ryusuke Konishi <[email protected]> wrote:
> Hi Paul,
>
> On Fri, 2008-12-19 at 09:45 -0500, Paul L wrote:
>> Ok, I managed to capture the crash, this time it happened when I was
>> in console not X. So the screen grab may tell some useful info, just
>> pardon my bad camera skills :P
>>
>> A photo is attached.
>
> Thanks for the photo.
>
> According to the screen dump, a preemption counter which is used
> to kernel interrupt handlings, seems to be unexpectedly raised
> by something and kunmap() kernel function called by nilfs
> unfortunately detected it.
>
> Though I'm looking at the functions which appear in the stack dump,
> there is a possibility that this was caused by some problem of the
> 2.6.28-rc4 kernel.
>
> To separate suspicious kernel functions,
> could you try turning off CONFIG_PREEMPT option?
>
> I've tested the same kernel (i.e. linux-2.6.28-rc4) with your config,
> but not yet succeeded to reproduce your problem.
>
> With regards,
> Ryusuke
>
>
>


-- 
Regards,
Paul Liu

Yale Haskell Group
http://www.haskell.org/yale
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