From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932108Ab1GGPyv (ORCPT ); Thu, 7 Jul 2011 11:54:51 -0400 Received: from mail1.slb.deg.dub.stisp.net ([84.203.253.98]:2327 "HELO mail1.slb.deg.dub.stisp.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751882Ab1GGPyt (ORCPT ); Thu, 7 Jul 2011 11:54:49 -0400 Message-ID: <4E15D67B.2080405@draigBrady.com> Date: Thu, 07 Jul 2011 16:53:31 +0100 From: =?ISO-8859-1?Q?P=E1draig_Brady?= User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: Valdis.Kletnieks@vt.edu CC: Bjorn Helgaas , Wim Van Sebroeck , linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org Subject: Re: [PATCH 1/2] watchdog: iTCO_wdt: optionally leave watchdog enabled during restart References: <20110706160744.4002.94920.stgit@bhelgaas.mtv.corp.google.com> <20110706160936.4002.1846.stgit@bhelgaas.mtv.corp.google.com> <12164.1310053141@turing-police.cc.vt.edu> In-Reply-To: <12164.1310053141@turing-police.cc.vt.edu> X-Enigmail-Version: 1.0.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/07/11 16:39, Valdis.Kletnieks@vt.edu wrote: > On Wed, 06 Jul 2011 10:09:36 MDT, Bjorn Helgaas said: > >> If we reboot via BIOS, BIOS should disable the watchdog itself, so this >> shouldn't cause unintended resets, even if the user interrupts the boot. > > Yes, but didn't Linus say something about BIOS code authors being > crack-addicted monkeys? :) Yes as I said in a round about way in another mail, one can't depend on that at all. Some reset, some don't, some behave weirdly, iTCO is unusual as kernel resets early at boot, ... If using this, one would have to set the timeout large enough, to encompass a full reboot