From owner-freebsd-hackers Wed Feb 14 14:26:11 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id OAA18839 for hackers-outgoing; Wed, 14 Feb 1996 14:26:11 -0800 (PST) Received: from phaeton.artisoft.com (phaeton.Artisoft.COM [198.17.250.211]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id OAA18811 for ; Wed, 14 Feb 1996 14:26:04 -0800 (PST) Received: (from terry@localhost) by phaeton.artisoft.com (8.6.11/8.6.9) id PAA00837; Wed, 14 Feb 1996 15:23:52 -0700 From: Terry Lambert Message-Id: <199602142223.PAA00837@phaeton.artisoft.com> Subject: Re: VM question To: T0682740@pmail.tepco.co.jp Date: Wed, 14 Feb 1996 15:23:52 -0700 (MST) Cc: terry@lambert.org, hackers@FreeBSD.org In-Reply-To: <3121D613.C680.001@pmail.tepco.co.jp> from "T0682740@pmail.tepco.co.jp" at Feb 14, 96 09:31:15 pm X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@FreeBSD.org Precedence: bulk > > The Usenix papers are generally available for anonymouse FTP, both by > > the authors home site, and from the Usenix SAGE group ftp site. The > > SAGE FTP site is: ftp://ftp/sage.usenix.org/ > > Unfortunately they don't hold the latest papers. Only up to 1994 or > so. You'll have to subscribe to the proceedings, or get a copy from somone who does (or hit up the authors, but it's hard to get that information without the rest of it...). > > FreeBSD does not have a mach VM system any more. The MACH VM system > > does not operate (implicitly) on a unified buffer cache scheme. Cache > > unification is an important win. > > Is there any paper about unified buffer cache scheme? Talk to John Dyson and David Greenman. They should write and present a paper, IMO. > > You could implement an external demand pager on the basis of trapping > > the SIGSEGV signal, and implementing mapping of resources as a result; > > you would robably be better off providing a kernel interface, however, > > since you would have to coalesce domains to keep the number of entries > > small enough to avoid problems. > > Actually, I'd like to implement a sort of DSM that provides > page-in/out over the network transparently to the user process. I believe this exists and is in ports already -- or in experimental. One of the interesting apps is cluster computing (search for "David Sarnoff" or slight varioations on the web -- that's the name of the research center). The Willows software does user mode paging; it's available with agreement to their license (see www.willows.com). Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.