From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753956AbXJ3MvT (ORCPT ); Tue, 30 Oct 2007 08:51:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752155AbXJ3MvK (ORCPT ); Tue, 30 Oct 2007 08:51:10 -0400 Received: from caffeine.csclub.uwaterloo.ca ([129.97.134.17]:58600 "EHLO caffeine.csclub.uwaterloo.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751757AbXJ3MvJ (ORCPT ); Tue, 30 Oct 2007 08:51:09 -0400 Date: Tue, 30 Oct 2007 08:51:08 -0400 To: Josh Boyer Cc: Stefan Roese , linux-kernel@vger.kernel.org Subject: Re: Bootup support for watchdog with short timeout (touch_nmi_watchdog()?) Message-ID: <20071030125108.GC27643@csclub.uwaterloo.ca> References: <200710291522.27311.stefan.roese@gmail.com> <20071029194503.GB27646@csclub.uwaterloo.ca> <20071029215454.0d644ca7@vader.jdub.homelinux.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20071029215454.0d644ca7@vader.jdub.homelinux.org> User-Agent: Mutt/1.5.13 (2006-08-11) From: lsorense@csclub.uwaterloo.ca (Lennart Sorensen) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 29, 2007 at 09:54:54PM -0500, Josh Boyer wrote: > To some degree, it's configurable. But the generic question still > stands. It seems like a decent idea to me. Making touch_watchdog (or > whatever it winds up being called) nice across arches might be fun. It always seemed to me that it was userspace that should poke the watchdog as an indication user space still works on the system. That's how my watchdogs are managed. I do initialize them in the boot loader with a 3 minute timeout which is more than long enough for the system to boot, load the driver and change the timeout to 60 seconds or whatever I want at runtime and start the watchdog daemon. If the kernel hangs at initializing some driver, I do NOT want the kernel to automatically be poking the watchdog. I want it to time out so to me the kernel should not be able to kick the watchdog at all by itself. -- Len Sorensen