Re: perf_fuzzer crash on pentium 4

Cyrill Gorcunov
2014-05-07T21:54:37Z

On Thu, May 08, 2014 at 01:51:44AM +0400, Cyrill Gorcunov wrote:
>
> > When fuzzing on the p4 *other* things do happen.
> > * at least two warnings pop up almost instantly
> > * eventually the machine will crash in an endless NMI storm
> > * also I managed to get the machine wedged with an unkillable
> > process, sort of like the known problem PeterZ has.
> >
> > The NMI issue is probably the only one that is p4 related, and I do get
> > the NMI warnings on other machines too, it's just the p4 is the only one
> > where it brings down the machine.
>
> Vince, could you please provde more details on that? Is it possible
> to somehow log which events were used by perf?

There were a bug in p4 pmu Don (CC'ed) fixed not that long ago but I fear
not all corner cases might be covered yet.