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

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Message-ID: <CABPqkBT7ogN2Og20WtpRhKo29Twf0Lt_eZpPFie=dzPps-HWTQ@mail.gmail.com>
Date:	Tue, 8 Mar 2016 12:59:23 -0800
From:	Stephane Eranian <eranian@...gle.com>
To:	Peter Zijlstra <peterz@...radead.org>
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

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.

>
> > >
> >
> > I needed declaration below to compile
>
> Yes indeed, (because Monday) I only compiled part of the patch series
> and then the build bot initial emails were all builds success.
>
> I have since fixed this (and gotten a fail email from the build bot).
>
> In any case, lots of fail, but it should be fixed if you've pulled from
> that git branch in the last 5 hours or so.