From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267580AbUHEHHq (ORCPT ); Thu, 5 Aug 2004 03:07:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267581AbUHEHHq (ORCPT ); Thu, 5 Aug 2004 03:07:46 -0400 Received: from mx1.redhat.com ([66.187.233.31]:26292 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S267580AbUHEHHo (ORCPT ); Thu, 5 Aug 2004 03:07:44 -0400 Message-ID: <4111DC8C.7050504@redhat.com> Date: Thu, 05 Aug 2004 00:06:52 -0700 From: Ulrich Drepper Organization: Red Hat, Inc. User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8a3) Gecko/20040804 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Andrew Morton CC: "Perez-Gonzalez, Inaky" , linux-kernel@vger.kernel.org, robustmutexes@lists.osdl.org, Rusty Russell , Ingo Molnar , Jamie Lokier Subject: Re: [RFC/PATCH] FUSYN Realtime & robust mutexes for Linux, v2.3.1 References: <20040804232123.3906dab6.akpm@osdl.org> In-Reply-To: <20040804232123.3906dab6.akpm@osdl.org> X-Enigmail-Version: 0.85.0.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andrew Morton wrote: > This fixes what appear to be some fairly significant shortcomings. What do > the futex and NPTL people have to say about the gravity of the problems > which this solves, and the offered implementation? This code will not be suppoerted by the glibc code. Using these primitives would mean significant slowdown of all operations and this for problems which only a few people have. I asked to get the useful parts of the code to be made available using the current futex interface (robust mutexes are useful) but Inaky and rest rest never acted on this and instead invented this completely incompatible interface. IMO this code should not go into the mainstream kernel. Let those who want to do realtime work bear the costs. -- ➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖