From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: nmi_watchdog fix for x86_64 to be more like i386 Date: Mon, 1 Oct 2007 19:36:01 +0200 Message-ID: <200710011936.01528.ak@suse.de> References: <46FA4A800200006C000192FE@sinclair.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org, tglx@linutronix.de, "Gregory Haskins" To: "David Bahi" Return-path: Received: from mail.suse.de ([195.135.220.2]:44840 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752181AbXJARgF (ORCPT ); Mon, 1 Oct 2007 13:36:05 -0400 In-Reply-To: <46FA4A800200006C000192FE@sinclair.provo.novell.com> Content-Disposition: inline Sender: linux-rt-users-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org On Wednesday 26 September 2007 20:03:12 David Bahi wrote: > Thanks to tglx and ghaskins for all the help in tracking down a very > early nmi_watchdog crash on certain x86_64 machines. The patch is totally bogus. irq 0 doesn't say anything about whether the current CPU still works or not. You always need some local interrupt. This basically disables the NMI watchdog for the non boot CPUs. It's even wrong on i386 -- i wonder how that broken patch made it in there. I'll remove it there. -Andi