From owner-freebsd-arch Thu May 18 23:44: 1 2000 Delivered-To: freebsd-arch@freebsd.org Received: from mercury.Sun.COM (mercury.Sun.COM [192.9.25.1]) by hub.freebsd.org (Postfix) with ESMTP id CC3EA37B771; Thu, 18 May 2000 23:43:53 -0700 (PDT) (envelope-from michael.schuster@germany.sun.com) Received: from emuc05-home.Germany.Sun.COM ([129.157.51.10]) by mercury.Sun.COM (8.9.3+Sun/8.9.3) with ESMTP id XAA19619; Thu, 18 May 2000 23:43:50 -0700 (PDT) Received: from germany.sun.com (hacker [129.157.167.97]) by emuc05-home.Germany.Sun.COM (8.8.8+Sun/8.8.8/ENSMAIL,v1.7) with ESMTP id IAA04985; Fri, 19 May 2000 08:43:48 +0200 (MET DST) Message-ID: <3924E25D.DEB9F987@germany.sun.com> Date: Fri, 19 May 2000 08:42:37 +0200 From: Michael Schuster - TSC SunOS Germany Organization: Sun Microsystems, Inc. X-Mailer: Mozilla 4.73 [en] (X11; I; SunOS 5.8 sun4u) X-Accept-Language: en MIME-Version: 1.0 To: Wes Peters Cc: Mike Smith , Chuck Paterson , Doug Rabson , arch@FreeBSD.ORG Subject: Re: A new api for asynchronous task execution References: <200005190529.WAA06634@mass.cdrom.com> <3924E16A.B1123749@softweyr.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Wes Peters wrote: > > Mike Smith wrote: > > > > > > If you are talking about running processes in > > > > order based on scheduling priority, this is propagated > > > > though mutexs which have been blocked on. > > > > > > No, speaking of temporarily elevating the priority of a process holding > > > a lock to the highest priority of all processes blocking on the lock. > > > > You could call this "priority lending" so that the rest of us understand > > what you're talking about. 8) > > The only system I've ever worked on that implements them refer to > them as inversion-safe or inversion-proof semaphores. I've never seen > another name, including "priority lending", in any literature or > article on the subject. 'scuse me for barging in - this sounds like what I know as "priority inheritance" (as one solution to the priority inversion problem). Are we talking of the same thing here? If no, what _is_ the difference? If yes, I could probably dig up one or two papers using these terms (we do at Sun, but that's not necessarily the place you're looking ... :-) cheers Michael -- Michael Schuster / Michael.Schuster@germany.sun.com Sun Microsystems GmbH / Richard-Reitzner Allee 8, D-85540 Haar (+49 89) 46008 974 / x12974 Recursion, n.: see 'Recursion' To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message