From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757331AbXLBUKG (ORCPT ); Sun, 2 Dec 2007 15:10:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752179AbXLBUJz (ORCPT ); Sun, 2 Dec 2007 15:09:55 -0500 Received: from one.firstfloor.org ([213.235.205.2]:55880 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754886AbXLBUJz (ORCPT ); Sun, 2 Dec 2007 15:09:55 -0500 Date: Sun, 2 Dec 2007 21:09:53 +0100 From: Andi Kleen To: Arjan van de Ven Cc: Ingo Molnar , Andi Kleen , linux-kernel@vger.kernel.org, Andrew Morton , Thomas Gleixner Subject: Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks Message-ID: <20071202200953.GA23994@one.firstfloor.org> References: <20071201092037.GA32544@elte.hu> <20071202185945.GA25990@elte.hu> <20071202114152.3bf4332d@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20071202114152.3bf4332d@laptopd505.fenrus.org> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > .. and it's even a tool to show where we missed making something > TASK_KILLABLE... anything that triggers from NFS and the like really > ought to be TASK_KILLABLE after all. This patch will point any > omissions out quite nicely without having to do any kind of destructive > testing. It would be better to just audit the source for those. Outlawing something which was previously legal without auditing the source is bad. Anyways, i suspect it would just lead to more people disabling softlockup. I remember during some older stress testing it also tended to explode regularly, so e.g. SUSE kernel rpms have it disabled. That patch would probably make it worse. -Andi