Messages in this thread | | | Date | Mon, 28 Oct 2013 16:01:14 +0100 | From | Ingo Molnar <> | Subject | Re: [BUG 3.12.rc4] Oops: unable to handle kernel paging request during shutdown |
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* Knut Petersen <Knut_Petersen@t-online.de> wrote:
> On 26.10.2013 13:43, Ingo Molnar wrote: > >* Linus Torvalds <torvalds@linux-foundation.org> wrote: > > > >>On Fri, Oct 25, 2013 at 11:23 AM, Thomas Gleixner <tglx@linutronix.de> wrote: > >>>Enable DEBUG_OBJECTS, DEBUG_OBJECTS_FREE, DEBUG_OBJECTS_TIMERS > >>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?
Thanks,
Ingo
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