From owner-freebsd-arch Sun May 21 12:39:54 2000 Delivered-To: freebsd-arch@freebsd.org Received: from obie.softweyr.com (obie.softweyr.com [204.68.178.33]) by hub.freebsd.org (Postfix) with ESMTP id CD5BA37B7E4; Sun, 21 May 2000 12:39:49 -0700 (PDT) (envelope-from wes@softweyr.com) Received: from softweyr.com (homer.softweyr.com [204.68.178.39]) by obie.softweyr.com (8.8.8/8.8.8) with ESMTP id NAA24821; Sun, 21 May 2000 13:39:42 -0600 (MDT) (envelope-from wes@softweyr.com) Message-ID: <39283C21.9A5E6055@softweyr.com> Date: Sun, 21 May 2000 13:42:25 -0600 From: Wes Peters Organization: Softweyr LLC X-Mailer: Mozilla 4.7 [en] (X11; U; FreeBSD 4.0-STABLE i386) X-Accept-Language: en MIME-Version: 1.0 To: Michael Schuster - TSC SunOS Germany 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> <3924E25D.DEB9F987@germany.sun.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Michael Schuster - TSC SunOS Germany wrote: > > Wes Peters wrote: > > > > Mike Smith wrote: > > > > > > 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 ... :-) It's not really inheritance, since the two processes don't have to be related to each other in any way other than both are attempting to or have acquired the same lock. -- "Where am I, and what am I doing in this handbasket?" Wes Peters Softweyr LLC wes@softweyr.com http://softweyr.com/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message