linux-kernel - Re: [PATCH 0/3 v2] nmi perf fixes

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Date:	Fri, 10 Sep 2010 09:27:41 -0400
From:	Don Zickus <dzickus@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	mingo@...e.hu, robert.richter@....com, gorcunov@...il.com,
	fweisbec@...il.com, linux-kernel@...r.kernel.org,
	ying.huang@...el.com, ming.m.lin@...el.com, yinghai@...nel.org,
	andi@...stfloor.org, eranian@...gle.com
Subject: Re: [PATCH 0/3 v2] nmi perf fixes

On Fri, Sep 10, 2010 at 01:41:40PM +0200, Peter Zijlstra wrote:
> On Thu, 2010-09-02 at 15:07 -0400, Don Zickus wrote:
> > Fixes to allow unknown nmis to pass through the perf nmi handler instead
> > of being swallowed.  Contains patches that are already in Ingo's tree.  Added
> > here for completeness.  Based on ingo/tip
> > 
> > Tested on intel/amd
> > 
> > v2: patch cleanups and consolidation, no code changes
> > 
> > Don Zickus (1):
> >   perf, x86: Fix accidentally ack'ing a second event on intel perf
> >     counter
> > 
> > Peter Zijlstra (1):
> >   perf, x86: Fix handle_irq return values
> > 
> > Robert Richter (1):
> >   perf, x86: Try to handle unknown nmis with an enabled PMU
> > 
> >  arch/x86/kernel/cpu/perf_event.c       |   59 +++++++++++++++++++++++++-------
> >  arch/x86/kernel/cpu/perf_event_intel.c |   15 +++++---
> >  arch/x86/kernel/cpu/perf_event_p4.c    |    2 +-
> >  3 files changed, 56 insertions(+), 20 deletions(-)
> 
> Both Ingo and I are getting Dazed and confused on our AMD machines, it
> started before yesterday (that is, after backing out all my recent
> changes it still gets dazed), so I suspect this set.
> 
> I'll look at getting a trace of the thing, but if any of you has a
> bright idea...

What are you running to create the problem?  I can try and duplicate it
here.

Cheers,
Don

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