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On Tue, Jul 09, 2013 at 06:49:29PM -0400, Sasha Levin wrote:
 > On 07/09/2013 06:47 PM, Dave Jones wrote:
 
 > >   > [ 2536.500130] INFO: NMI handler (arch_trigger_all_cpu_backtrace_handler) took too long to run:
 > >   > 697182.008 msecs
 > >
 > > I've been reporting these (and other traces) for a while https://lkml.org/lkml/2013/7/5/185 [1]
 > > on bare-metal.
 > 
 > Interesting. It's the first time I'm seeing these, but I haven't really changed
 > anything in my configuration.
 > 
 > Are you also seeing the "NMI handler took too long" messages?

Now that I look closer, one difference is you're seeing arch_trigger_all_cpu_backtrace_handler
in that message. I'm seeing them from perf_event_nmi_handler.

	Dave


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