Re: [BUG 3.12.rc4] Oops: unable to handle kernel paging requestduring shutdown

From: Ingo Molnar
Date: Mon Oct 28 2013 - 11:01:27 EST

* Knut Petersen <Knut_Petersen@xxxxxxxxxxx> wrote:

> On 26.10.2013 13:43, Ingo Molnar wrote:
> >* Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> >
> >>On Fri, Oct 25, 2013 at 11:23 AM, Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> >>Yes, but nobody has actually been able to trigger it with those.
> >>It's pretty rare, and the debug options are so expensive that they
> >>aren't reasonable to enable generally...
> >>
> >>So we need to try to figure out how to trigger it, or narrow
> >>things down some way..
> >If it's timing then maybe the 1 seconds delay isn't enough
> >(especially if it's boot related, where we have a couple of delays
> >already) - the patch below triples it.
> >
> >(If the bug goes away due to some other side effect then this patch
> >won't make a difference to reproducability.)
> I tried that patch, together with all the kobj debug options
> enabled. With that kernel configuration I was unable to reproduce
> the problem during 500 typical workload / reboot cycles. Without
> the debug options I was able to reproduce the last reported panic
> after 91 cycles. The debug options seem to change timing
> sufficiently to mask the bug ;-(

Could you send me the kernel config please?


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