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

[Peter Zijlstra]

On Tue, Mar 01, 2016 at 03:51:05PM +0100, Andi Kleen wrote:
> > im on it.. 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
> 
> May be the easiest would be to just keep the old buffer size
> on Merom.

I would still like to know why it breaks though. Just changing code
about because it makes fail go away is never the right answer.