Messages in this thread | | | Date | Thu, 20 Sep 2012 10:46:34 +0200 | Subject | Re: RCU lockup in the SMP idle thread, help... | From | Linus Walleij <> |
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On Thu, Sep 20, 2012 at 2:03 AM, Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:
> Any thoughts on the feasibility of implementing NMI-based stack backtraces > for ARM?
Nico's department, so let's page him.
In IIRC ux500 all NMIs are reserved for the secure world, so it's basically a no can do. :-(
And I'm told this is the case in some other ARMv7 arches too.
> In the meantime, a crude fallback is for the CPU that detected the stall > to trace the stack of the task running on the other CPU. See below for > a crude (and untested) patch.
I'll test!
Thanks, Linus Walleij
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