Date: Wed, 4 Aug 2010 12:29:10 +0200
From: Robert Richter <robert.richter@amd.com>
To: Peter Zijlstra <peterz@infradead.org>
CC: Lin Ming <ming.m.lin@intel.com>, Ingo Molnar <mingo@elte.hu>,
        Don Zickus <dzickus@redhat.com>, Cyrill Gorcunov <gorcunov@gmail.com>,
        "fweisbec@gmail.com" <fweisbec@gmail.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "Huang, Ying" <ying.huang@intel.com>
Subject: Re: A question of perf NMI handler
Message-ID: <20100804102910.GI26154@erda.amd.com>
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 <20100804100116.GH26154@erda.amd.com>
 <1280917458.1923.937.camel@laptop>
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On 04.08.10 06:24:18, Peter Zijlstra wrote:
> On Wed, 2010-08-04 at 12:01 +0200, Robert Richter wrote:
> > To ensure that all other nmi handlers are
> > called, the perfctr's nmi handler must have the lowest priority. Then,
> > the handler will be the last in the chain. 
> 
> Well, unless another NMI handler has the exact same issue and also
> starts eating all NMIs, just in case.

In this case we will have to change the implementation for unhandled
nmis. But I don't know of other sources with this issue.

-Robert

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

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