From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750704AbWGWQ34 (ORCPT ); Sun, 23 Jul 2006 12:29:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750799AbWGWQ34 (ORCPT ); Sun, 23 Jul 2006 12:29:56 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:39383 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S1750704AbWGWQ3z (ORCPT ); Sun, 23 Jul 2006 12:29:55 -0400 Date: Sun, 23 Jul 2006 18:24:04 +0200 From: Ingo Molnar To: Andrew Morton Cc: Linus Torvalds , davej@redhat.com, linux-kernel@vger.kernel.org, ashok.raj@intel.com Subject: Re: remove cpu hotplug bustification in cpufreq. Message-ID: <20060723162404.GA13129@elte.hu> References: <20060722194018.GA28924@redhat.com> <20060722180602.ac0d36f5.akpm@osdl.org> <20060722223425.c94a858e.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060722223425.c94a858e.akpm@osdl.org> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: -3.1 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-3.1 required=5.9 tests=ALL_TRUSTED,AWL,BAYES_50 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts 0.0 BAYES_50 BODY: Bayesian spam probability is 40 to 60% [score: 0.5003] 0.2 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Andrew Morton wrote: > > I'll try them out. If they don't work, we should just delete the > > lock and go totally back to square 1. > > rwsem conversion has the potential to merely hide the problem. Ingo, > does lockdep detect recursive down_read()? yeah, it does - there are a couple of testcases for it too, in the testsuite. Ingo