Re: [RFC/PATCH] perf: Expand definition of sysfs format attribute

From: Arnaldo Carvalho de Melo
Date: Mon May 06 2013 - 16:19:34 EST


Em Mon, May 06, 2013 at 11:08:30AM +1000, Michael Ellerman escreveu:
> On Mon, Apr 08, 2013 at 05:24:22PM +1000, Michael Ellerman wrote:
> > On Mon, Mar 04, 2013 at 03:21:05PM +1100, Michael Ellerman wrote:
> > > Make it explicit that the format attributes may define overlapping bit
> > > ranges. Unfortunately this was left unspecified originally, and all the
> > > examples show non-overlapping ranges. I don't believe this is an ABI
> > > change, as we are defining something that was previously undefined, but
> > > others may disagree.
> > >
> > > The POWER8 PMU would like to define overlapping ranges, as bit ranges in
> > > the event code have different meanings for certain events. It will also
> > > allow us to define an overarching "event" field, that encompasses all
> > > others.
> > >
> > > As far as I can see perf is comfortable with this change, however I am
> > > not sure if there are any other users of the interface.
> >
> > Any comments on this one?

> I think the consensus from Peter and Jiri was that this was OK, are you
> happy to merge it?

I'll do it eventually, but now I'm on vacations, so perhaps Jiri can
process it and push to Ingo? Jiri?

- Arnaldo
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