Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756924AbZLKKWA (ORCPT ); Fri, 11 Dec 2009 05:22:00 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755721AbZLKKV4 (ORCPT ); Fri, 11 Dec 2009 05:21:56 -0500 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:54870 "EHLO opensource2.wolfsonmicro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754802AbZLKKV4 (ORCPT ); Fri, 11 Dec 2009 05:21:56 -0500 Date: Fri, 11 Dec 2009 10:21:59 +0000 From: Mark Brown To: Cypher Wu Cc: linux-kernel@vger.kernel.org Subject: Re: Questions about Watch Dog Timer under Linux. Message-ID: <20091211102159.GB18825@rakim.wolfsonmicro.main> References: <20091209145919.GH9018@sirena.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Cookie: Do not exceed recommended dosage. User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 751 Lines: 17 On Fri, Dec 11, 2009 at 04:27:55PM +0800, Cypher Wu wrote: Please reply in-line to e-mails, it makes the conversation much easier to follow. > It seems WATCHDOG_NOWAYOUT is a software mechanism? If it is defined > as 1 then the WDT can't be stopped if it has been started whether bye > closing the device file or writing the magic character 'V'. Yes, it's a kernel build time configurable option to select this behaviour. In effect all you'd be doing is making a driver which turns it on all the time. -- 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/