Re: [BUG] Core2 cpu triggers hard lockup with perf test

Peter Zijlstra
2016-03-01T11:20:25Z

On Tue, Mar 01, 2016 at 12:06:51PM +0100, Jiri Olsa wrote:
> >
> > [ Jiri, can you disable that stupid panic on hard lockup and let it run
> > for a while, see if all the lockup msgs hit the same IP? Also, can you
> > look where exactly that IP lives in the code? ]
>
> im on it..

Thanks!

> also the patch that makes this happen just
> enlarge the buffer for PEBS:
>
> 156174999dd1 perf/intel/x86: Enlarge the PEBS buffer
>
> but I did not find anyaPEBS buffer lenght limitations in SDM

Probably just makes it easier to tickle.