Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161538AbXBHIHW (ORCPT ); Thu, 8 Feb 2007 03:07:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161479AbXBHIHV (ORCPT ); Thu, 8 Feb 2007 03:07:21 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:36970 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161538AbXBHIHU (ORCPT ); Thu, 8 Feb 2007 03:07:20 -0500 Date: Thu, 8 Feb 2007 09:06:44 +0100 From: Ingo Molnar To: Andrew Morton Cc: Lukasz Trabinski , linux-kernel@vger.kernel.org, Bartlomiej Solarz-Niesluchowski , Thomas Gleixner Subject: Re: 2.6.20 BUG: soft lockup detected on CPU#0! Message-ID: <20070208080644.GA14579@elte.hu> References: <20070207204745.a2640c43.akpm@linux-foundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070207204745.a2640c43.akpm@linux-foundation.org> User-Agent: Mutt/1.4.2.2i X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -5.3 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-5.3 required=5.9 tests=ALL_TRUSTED,BAYES_00 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts -2.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 853 Lines: 19 * Andrew Morton wrote: > The softlock detector has a long history of false positives and > precious few true positives, in my experience. hm, not so the latest & lamest in my experience. The commit that made it quite robust was 6687a97d4041f996f725902d2990e5de6ef5cbe5, as of March 2006, and first showed up in 2.6.17. (OTOH, since the merge of lockdep the main source of soft lockups in the field has been quite severely reduced. Nevertheless it's still good to have it around, occasionally there happen other types of soft lockups too, in open-coded loops, etc.) Ingo - 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/