linux-kernel - Re: [PATCH 2/3] perf/x86/pebs: add workaround for broken OVFL status on HSW

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Message-ID: <20160308210707.GG6344@twins.programming.kicks-ass.net>
Date:	Tue, 8 Mar 2016 22:07:07 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Jiri Olsa <jolsa@...hat.com>, Andi Kleen <ak@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"Liang, Kan" <kan.liang@...el.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCH 2/3] perf/x86/pebs: add workaround for broken OVFL status
 on HSW

On Tue, Mar 08, 2016 at 12:59:23PM -0800, Stephane Eranian wrote:
> hi,
> 
> On Mon, Mar 7, 2016 at 12:25 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> >
> > On Mon, Mar 07, 2016 at 07:27:31PM +0100, Jiri Olsa wrote:
> > > On Mon, Mar 07, 2016 at 01:18:40PM +0100, Peter Zijlstra wrote:
> > > > On Mon, Mar 07, 2016 at 11:24:13AM +0100, Peter Zijlstra wrote:
> > > >
> > > > > I suspect Andi is having something along:
> > > > >
> > > > >  lkml.kernel.org/r/1445458568-16956-1-git-send-email-andi@...stfloor.org
> > > > >
> > > > > applied to his tree.
> > > >
> > > > OK, I munged a bunch of patches together, please have a hard look at the
> > > > end result found in:
> > > >
> > > >   git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git perf/core
> > > >
> 
> I ran this kernel on Haswell. Even with Andi's fixes the problem I identified is
> still there, so my patch is still needed.

Right, your patch should be included in that kernel, or did I make a
royal mess of things?

I put Andi's late status ack on top of your patch.

Also note, Ingo merged most of those patches today, all except the top
3, because Andi wanted to double check something.