Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932471AbVLVMs3 (ORCPT ); Thu, 22 Dec 2005 07:48:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932477AbVLVMs3 (ORCPT ); Thu, 22 Dec 2005 07:48:29 -0500 Received: from adsl-69-232-92-238.dsl.sndg02.pacbell.net ([69.232.92.238]:44484 "EHLO gnuppy.monkey.org") by vger.kernel.org with ESMTP id S932471AbVLVMs2 (ORCPT ); Thu, 22 Dec 2005 07:48:28 -0500 Date: Thu, 22 Dec 2005 04:45:13 -0800 To: Linus Torvalds Cc: Steven Rostedt , Joe Korty , Thomas Gleixner , Geert Uytterhoeven , Andrew Morton , linux-arch@vger.kernel.org, Linux Kernel Development , matthew@wil.cx, arjan@infradead.org, Christoph Hellwig , mingo@elte.hu, Alan Cox , nikita@clusterfs.com, pj@sgi.com, dhowells@redhat.com Subject: Re: [PATCH 1/19] MUTEX: Introduce simple mutex implementation Message-ID: <20051222124513.GC14633@gnuppy.monkey.org> References: <1134770778.2806.31.camel@tglx.tec.linutronix.de> <1134772964.2806.50.camel@tglx.tec.linutronix.de> <20051217002929.GA7151@tsunami.ccur.com> <20051222124027.GB14633@gnuppy.monkey.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051222124027.GB14633@gnuppy.monkey.org> User-Agent: Mutt/1.5.11 From: Bill Huey (hui) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 977 Lines: 23 On Thu, Dec 22, 2005 at 04:40:27AM -0800, Bill Huey wrote: > The current kernel mostly using traditional spinlocks doesn't have locking > complicated enough to warrant it. However, the -rt patch does create[s] a > circumstance where a fully preemptible [kernel] may sleep task with mutexes held create[ing] > [-and needs] [a need to] resolve priority inversions that results from it. That's of With corrections... Sorry, I meant a fully preemptive kernel has priority inversion as an inheritant property and needs to resolved using some kind of priority inheritance. > course assuming that priority is something that needs to be strictly > obeyed in this variant of the kernel with consideration to priority > inheritance. bill - 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/