Date: Thu, 12 Aug 2010 15:10:07 +0200
From: Robert Richter <robert.richter@amd.com>
To: Don Zickus <dzickus@redhat.com>
CC: Cyrill Gorcunov <gorcunov@gmail.com>,
        Peter Zijlstra <peterz@infradead.org>, Lin Ming <ming.m.lin@intel.com>,
        Ingo Molnar <mingo@elte.hu>, "fweisbec@gmail.com" <fweisbec@gmail.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "Huang, Ying" <ying.huang@intel.com>, Yinghai Lu <yinghai@kernel.org>,
        Andi Kleen <andi@firstfloor.org>
Subject: Re: [PATCH -v2] perf, x86: try to handle unknown nmis with running
 perfctrs
Message-ID: <20100812131007.GW26154@erda.amd.com>
References: <20100804155002.GS3353@redhat.com>
 <20100804161046.GC5130@lenovo>
 <20100804162026.GU3353@redhat.com>
 <20100804163930.GE5130@lenovo>
 <20100804184806.GL26154@erda.amd.com>
 <20100804192634.GG5130@lenovo>
 <20100806065203.GR26154@erda.amd.com>
 <20100806142131.GA1874@redhat.com>
 <20100809194829.GB26154@erda.amd.com>
 <20100811220058.GT26154@erda.amd.com>
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On 12.08.10 00:00:58, Robert Richter wrote:
> I was debuging this a little more, see version 2 below.

I was testing the patch further, it properly filters perfctr
back-to-back nmis. I was able to reliable detect unknown nmis
triggered by the nmi button during high load perf sessions with
multiple counters, no false positives.

> 
> -Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center

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