Re: [PATCH 2/6] perf: Support branch events logging

[Peter Zijlstra]

On Fri, Apr 14, 2023 at 03:47:29PM -0700, Andi Kleen wrote:
> 
> > Yeah, don't do this. There is no guarantee what so ever you'll get any
> > of those events in the 0-3 range.
> 
> 
> The kernel can simply force to 0-3 if LBR is enabled and the feature too.
> It's in Kan's patch
> 
> and it isn't particularly complicated.

And what, totally leave 4-7 unused even if those counters were not
related to LBR at all? That seems exceedingly daft.