From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261348AbUJZRVq (ORCPT ); Tue, 26 Oct 2004 13:21:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261354AbUJZRVq (ORCPT ); Tue, 26 Oct 2004 13:21:46 -0400 Received: from tron.kn.vutbr.cz ([147.229.191.152]:25105 "EHLO tron.kn.vutbr.cz") by vger.kernel.org with ESMTP id S261348AbUJZRVn (ORCPT ); Tue, 26 Oct 2004 13:21:43 -0400 Message-ID: <417E8794.9040102@stud.feec.vutbr.cz> Date: Tue, 26 Oct 2004 19:21:24 +0200 From: Michal Schmidt User-Agent: Mozilla Thunderbird 0.8 (X11/20041005) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Ingo Molnar CC: Florian Schmidt , Michael Geithe , Linux Kernel list , Andrew Morton Subject: Re: 2.6.10-rc1-bk4 and kernel/futex.c:542 References: <200410261135.51035.warpy@gmx.de> <20041026133126.1b44fb38@mango.fruits.de> <20041026112415.GA21015@elte.hu> In-Reply-To: <20041026112415.GA21015@elte.hu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Flag: NO X-Spam-Report: Spam detection software, running on the system "tron.kn.vutbr.cz", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or block similar future email. If you have any questions, see the administrator of that system for details. ____ Content analysis details: (-4.2 points, 6.0 required) ____ pts rule name description ---- ---------------------- -------------------------------------------- 0.7 FROM_ENDS_IN_NUMS From: ends in numbers -4.9 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 Ingo Molnar wrote: > yeah, it definitely looks like there is some futex race that the > PREEMPT_REALTIME kernel triggers in no time. (this is because the > locking in the PREEMPT_REALTIME kernel is equivalent to an SMP system > with an infinite number of CPUs and will trigger the same races.) > > Ingo That's an interesting claim. I don't understand why it is equivalent. Could you please explain it? Michal