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From: Andi Kleen <ak@suse.de>
To: Ville Herva <vherva@niksula.hut.fi>
Cc: marcelo@conectiva.com.br, torvalds@osdl.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] NMI watchdog documentation
Date: Mon, 28 Jul 2003 19:53:42 +0200	[thread overview]
Message-ID: <20030728195342.02913727.ak@suse.de> (raw)
In-Reply-To: <20030723174325.GL150921@niksula.cs.hut.fi>

On Wed, 23 Jul 2003 20:43:25 +0300
Ville Herva <vherva@niksula.hut.fi> wrote:

> Documentation/nmi-watchdoc.txt doesn't actually tell what options need to be
> enabled in kernel config in order to use NMI watchdog. I for one found it
> confusing.
> 
> I vaguely recall someone posted a similar patch some time ago, but it still
> doesn't seem to be present in 2.4 or 2.6-test.
> 
> Andi: what about x86-64 - does it have something similar that should be
> mentioned?

x86-64 is the same, except APIC is always compiled in and the nmi watchdog is
always enabled with perfctr mode. mode=2 seems to also not work correctly currently.

However one caveat (even for i386): when you use perfctr mode 1 you lose the first
performance register which you may need for other things.

-Andi


  reply	other threads:[~2003-07-28 17:38 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-23 17:43 [PATCH] NMI watchdog documentation Ville Herva
2003-07-28 17:53 ` Andi Kleen [this message]
2003-07-28 19:21   ` Ville Herva
2003-07-29 10:37 Mikael Pettersson
2003-07-29 16:06 ` Andi Kleen
2003-07-29 17:53   ` Ville Herva
2003-07-30 19:18 Mikael Pettersson
2003-07-30 19:20 Mikael Pettersson
2003-07-30 19:40 ` Ville Herva
2003-07-30 22:53 Mikael Pettersson
2003-07-31  5:44 ` Ville Herva
2003-07-31 21:25 Mikael Pettersson

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