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Subject: Re: [PATCH 0/3 v2] nmi perf fixes
From: Peter Zijlstra <peterz@infradead.org>
To: Don Zickus <dzickus@redhat.com>
Cc: mingo@elte.hu, robert.richter@amd.com, gorcunov@gmail.com,
        fweisbec@gmail.com, linux-kernel@vger.kernel.org, ying.huang@intel.com,
        ming.m.lin@intel.com, yinghai@kernel.org, andi@firstfloor.org,
        eranian@google.com
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Date: Fri, 10 Sep 2010 13:41:40 +0200
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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...