Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754332AbXLCORs (ORCPT ); Mon, 3 Dec 2007 09:17:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752833AbXLCORl (ORCPT ); Mon, 3 Dec 2007 09:17:41 -0500 Received: from one.firstfloor.org ([213.235.205.2]:56445 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752214AbXLCORk (ORCPT ); Mon, 3 Dec 2007 09:17:40 -0500 Date: Mon, 3 Dec 2007 15:17:39 +0100 From: Andi Kleen To: Ingo Molnar Cc: Andi Kleen , Radoslaw Szkodzinski , Arjan van de Ven , linux-kernel@vger.kernel.org, Andrew Morton , Thomas Gleixner Subject: Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks Message-ID: <20071203141739.GC4719@one.firstfloor.org> References: <20071203110412.GD28560@one.firstfloor.org> <20071203115900.GB8432@elte.hu> <20071203121357.GB2986@one.firstfloor.org> <20071203122833.GA20232@elte.hu> <20071203124144.GC2986@one.firstfloor.org> <20071203130003.GA26372@elte.hu> <20071203131442.GA4004@one.firstfloor.org> <20071203132955.GA31354@elte.hu> <20071203134801.GB4004@one.firstfloor.org> <20071203135547.GA4245@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20071203135547.GA4245@elte.hu> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1010 Lines: 30 On Mon, Dec 03, 2007 at 02:55:47PM +0100, Ingo Molnar wrote: > > * Andi Kleen wrote: > > > I would still appreciate if you could state what default value you > > plan to set the backtrace sysctl to in the submitted patch. > > there's no "backtrace sysctl" planned for the moment. This "hung tasks" I hope you'll reconsider that at least before submitting this patch to mainline. For -mm it's probably ok. > debugging feature can be disabled/enabled on a wide scale already: > > - in the .config > > - runtime, temporarily, via: > > echo 0 > /proc/sys/kernel/hung_task_timeout_secs That won't address my concerns about already "breaking" (as in frightening the user etc.) common error handling scenarios by default. -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/