From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S270367AbTG1Ri3 (ORCPT ); Mon, 28 Jul 2003 13:38:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S270370AbTG1Ri3 (ORCPT ); Mon, 28 Jul 2003 13:38:29 -0400 Received: from ns.suse.de ([213.95.15.193]:5131 "EHLO Cantor.suse.de") by vger.kernel.org with ESMTP id S270367AbTG1Ri2 (ORCPT ); Mon, 28 Jul 2003 13:38:28 -0400 Date: Mon, 28 Jul 2003 19:53:42 +0200 From: Andi Kleen To: Ville Herva Cc: marcelo@conectiva.com.br, torvalds@osdl.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] NMI watchdog documentation Message-Id: <20030728195342.02913727.ak@suse.de> In-Reply-To: <20030723174325.GL150921@niksula.cs.hut.fi> References: <20030723174325.GL150921@niksula.cs.hut.fi> X-Mailer: Sylpheed version 0.8.9 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 23 Jul 2003 20:43:25 +0300 Ville Herva 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