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SubjectRe: x86_pmu_start WARN_ON.
On Thu, 13 Feb 2014, Vince Weaver wrote:
> On Wed, 12 Feb 2014, Vince Weaver wrote:
> >
> > It is triggered in this case when you have:
> >
> > An event group of breakpoint, cycles, branches
> > An event of instructions with precise=1
> > A tracepoint
> >
> > and then you close the tracepoint.
>
> and for what it's worth, it's the cycles event (type=0 config=0) that's
> causing the WARN_ON.

The plot thickens. The WARN_ON is not caused by the cycles event that we
open, but it's caused by the NMI Watchdog cycles event.

I'm not sure if that's useful info or not.

Vince


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