From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 15 Jan 2001 01:09:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 15 Jan 2001 01:09:17 -0500 Received: from mailgw.prontomail.com ([216.163.180.10]:17867 "EHLO c0mailgw04.prontomail.com") by vger.kernel.org with ESMTP id ; Mon, 15 Jan 2001 01:09:04 -0500 Message-ID: <3A628A49.7A8E3F69@mvista.com> Date: Sun, 14 Jan 2001 21:27:37 -0800 From: george anzinger Organization: Monta Vista Software X-Mailer: Mozilla 4.72 [en] (X11; I; Linux 2.2.12-20b i686) X-Accept-Language: en MIME-Version: 1.0 To: "David S. Miller" CC: nigel@nrg.org, andrewm@uow.edu.au, linux-kernel@vger.kernel.org, linux-audio-dev@ginette.musique.umontreal.ca Subject: Re: [linux-audio-dev] low-latency scheduling patch for 2.4.0 In-Reply-To: <200101110519.VAA02784@pizda.ninka.net> <14942.9759.730641.804611@pizda.ninka.net> Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org "David S. Miller" wrote: > > Nigel Gamble writes: > > That's why MontaVista's kernel preemption patch uses sleeping mutex > > locks instead of spinlocks for the long held locks. > > Anyone who uses sleeping mutex locks is asking for trouble. Priority > inversion is an issue I dearly hope we never have to deal with in the > Linux kernel, and sleeping SMP mutex locks lead to exactly this kind > of problem. > Exactly why we are going to us priority inherit mutexes. This handles the inversion nicely. George - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/