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Date: Sat, 21 Jun 2008 12:04:40 +0400
From: Cyrill Gorcunov <gorcunov@gmail.com>
To: "Maciej W. Rozycki" <macro@linux-mips.org>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
       "H. Peter Anvin" <hpa@zytor.com>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: nmi_watchdog suspicious
Message-ID: <20080621080440.GA7056@cvg>
References: <20080610185759.GA7353@cvg> <Pine.LNX.4.55.0806160040270.11995@cliff.in.clinika.pl> <20080616170000.GC7273@cvg> <Pine.LNX.4.55.0806161819500.20218@cliff.in.clinika.pl> <20080617155120.GA9440@cvg> <Pine.LNX.4.55.0806181654450.4857@cliff.in.clinika.pl> <20080618163905.GB7117@cvg> <Pine.LNX.4.55.0806181749050.4857@cliff.in.clinika.pl> <20080618172316.GA10431@cvg> <Pine.LNX.4.55.0806210250210.19614@cliff.in.clinika.pl>
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[Maciej W. Rozycki - Sat, Jun 21, 2008 at 02:54:38AM +0100]
| On Wed, 18 Jun 2008, Cyrill Gorcunov wrote:
| 
| > If you mean the case we get NMI physical line assetred while configuring APIC
| > (ie nmi watchdog is not properly configured yet) then I wonder why we has
| > this checking at all...
| 
|  Hmm, I am not sure what you mean -- nmi_watchdog_tick() can be called
| potentially at any time, and you can receive NMIs from sources other than
| the watchdog; the latters would set bits in the Port B at 0x61 in most
| cases though.  Anyway using a separate variable such as
| "nmi_watchdog_active" would be cleaner.
| 
|   Maciej
| 

ok, thanks Maciej, i'll take a look on this.

		- Cyrill -