linux-kernel - Re: [PATCH] perf, x86: try to handle unknown nmis with running perfctrs

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Message-ID: <20100810190541.GN26154@erda.amd.com>
Date:	Tue, 10 Aug 2010 21:05:41 +0200
From:	Robert Richter <robert.richter@....com>
To:	Cyrill Gorcunov <gorcunov@...il.com>
CC:	Don Zickus <dzickus@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Lin Ming <ming.m.lin@...el.com>, Ingo Molnar <mingo@...e.hu>,
	"fweisbec@...il.com" <fweisbec@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Huang, Ying" <ying.huang@...el.com>,
	Yinghai Lu <yinghai@...nel.org>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH] perf, x86: try to handle unknown nmis with running
 perfctrs

On 10.08.10 13:24:51, Cyrill Gorcunov wrote:

> It gets masked on NMI arrival, at least for some models (Core Duo, P4,
> P6 M and I suspect more theh that, that was the reason oprofile has
> it, also there is a note in SDM V3a page 643).

Yes, that's right, I never noticed that. Maybe it is better to
implement the apic write it in model specific code then.

-Robert

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

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