Re: [PATCH -v3] perf, x86: try to handle unknown nmis with running perfctrs

Ingo Molnar
2010-08-23T08:53:56Z

* Ingo Molnar <mingo@elte.hu> wrote:

>
> * Don Zickus <dzickus@redhat.com> wrote:
>
> > I'll test tip later today to see if I can reproduce it.
> >
> > Cheers,
> > Don
> >
> > Ingo Molnar <mingo@elte.hu> wrote:
> >
> > >
> > >it's not working so well, i'm getting:
> > >
> > > Uhhuh. NMI received for unknown reason 00 on CPU 9.
> > > Do you have a strange power saving mode enabled?
> > > Dazed and confused, but trying to continue
> > >
> > >on a nehalem box, after a perf top and perf stat run.
>
> FYI, it does not trigger on an AMD box.

Ok, to not hold up the perf/urgent flow i zapped these two commits for
the time being:

4a31beb: perf, x86: Fix handle_irq return values
8e3e42b: perf, x86: Try to handle unknown nmis with an enabled PMU

We can apply them if they take a form that dont introduce a different
kind of (and more visible) regression.

Thanks,

Ingo