From owner-freebsd-hackers Sun Dec 17 21:51:58 2000 From owner-freebsd-hackers@FreeBSD.ORG Sun Dec 17 21:51:53 2000 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from homer.softweyr.com (bsdconspiracy.net [208.187.122.220]) by hub.freebsd.org (Postfix) with ESMTP id E5E1337B404 for ; Sun, 17 Dec 2000 21:51:52 -0800 (PST) Received: from [127.0.0.1] (helo=softweyr.com ident=Fools trust ident!) by homer.softweyr.com with esmtp (Exim 3.16 #1) id 147sCX-0000Bn-00; Sun, 17 Dec 2000 21:47:05 -0700 Sender: wes@FreeBSD.ORG Message-ID: <3A3D96C9.FE121BF5@softweyr.com> Date: Sun, 17 Dec 2000 21:47:05 -0700 From: Wes Peters Organization: Softweyr LLC X-Mailer: Mozilla 4.75 [en] (X11; U; Linux 2.2.12 i386) X-Accept-Language: en MIME-Version: 1.0 To: Jordan Hubbard Cc: Andrew Reilly , freebsd-hackers@FreeBSD.ORG Subject: Re: kernel type References: <6134.977051878@winston.osd.bsdi.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Jordan Hubbard wrote: > > > Yeah, but in what sense is that use of Mach a serious > > microkernel, if it's only got one server: BSD? I've never > > understood the point of that sort of use. It makes sense for a > > QNX or GNU/Hurd or minix or Amoeba style of architecture, but > > how does Mach help Apple, instead of using the bottom half of > > BSD as well as the top half? > > That's actually a much better question and one I can't really answer. > > One theory might be that the NeXT people were simply Microkernel > bigots for no particularly well-justified reason and that is simply > that. Another theory might be that they were able to deal with the > machine-dependent parts of Mach far more easily given its > comparatively minimalist design and given their pre-existing expertise > with it. Another theory, sort of related to the previous one, is that > Apple has some sort of plans for the future which they're not > currently sharing where Mach plays some unique role. Does the older MacOS compatibility mode (is this the "blue box"?) run on the BSD-Lite server, or directly on Mach? That seems a likely starting point. -- "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-hackers" in the body of the message