Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757702AbYHZMbj (ORCPT ); Tue, 26 Aug 2008 08:31:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754664AbYHZMbb (ORCPT ); Tue, 26 Aug 2008 08:31:31 -0400 Received: from one.firstfloor.org ([213.235.205.2]:54980 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753953AbYHZMbb (ORCPT ); Tue, 26 Aug 2008 08:31:31 -0400 To: Avi Kivity Cc: Alan Cox , Pavel Machek , Ingo Molnar , "Eric W. Biederman" , linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: Re: [PATCH] x86: default to reboot via ACPI From: Andi Kleen References: <1219659087-17536-1-git-send-email-avi@qumranet.com> <20080826095032.GA309@elf.ucw.cz> <48B3D579.40502@qumranet.com> <20080826113317.520cbab1@lxorguk.ukuu.org.uk> <48B3F3A9.8030709@qumranet.com> Date: Tue, 26 Aug 2008 14:31:22 +0200 In-Reply-To: <48B3F3A9.8030709@qumranet.com> (Avi Kivity's message of "Tue, 26 Aug 2008 15:14:33 +0300") Message-ID: <87tzd8rm91.fsf@basil.nowhere.org> User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 642 Lines: 16 Avi Kivity writes: > > If a machine has acpi, and the reset register is wired to the launch > controller, then perhaps this change is unsafe. Don't issue sysrq-b > on such machines. Even if it's wired to the launch controller the launch controller would need to be quite quick to do something before the following triple fault/keyboard reset->PCI reset stops it again. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/