Re: [BUG 3.12.rc4] Oops: unable to handle kernel paging requestduring shutdown
From: Ingo Molnar
Date: Mon Oct 28 2013 - 11:16:45 EST
* Ingo Molnar <mingo@xxxxxxxxxx> wrote:
> > 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?
I got your .config off-list, thanks Knut!
It has all DEBUG_OBJECT options enabled:
# CONFIG_DEBUG_OBJECTS_SELFTEST is not set
but it also has DEBUG_PAGEALLOC enabled:
I'd suggest disabling that one - it kind of overlaps debugobjects
and it will definitely be a big slowdown.
I'd also suggest turning off lockdep for now:
because we know it does not trigger any useful warning. This too
should speed up things a bit.
Whether this would make the crash reproducable again I don't know
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/