From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 7257914d for ; Wed, 28 Aug 2019 18:49:53 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id 71A5C9BDB1; Thu, 29 Aug 2019 04:49:52 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id D4F549BD16; Thu, 29 Aug 2019 04:49:40 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id B1E1F9BD16; Thu, 29 Aug 2019 04:49:38 +1000 (AEST) Received: from freefriends.org (freefriends.org [96.88.95.60]) by minnie.tuhs.org (Postfix) with ESMTPS id 668C99BCD7 for ; Thu, 29 Aug 2019 04:49:38 +1000 (AEST) X-Envelope-From: arnold@skeeve.com Received: from freefriends.org (freefriends.org [96.88.95.60]) by freefriends.org (8.14.7/8.14.7) with ESMTP id x7SInVZS024812 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 28 Aug 2019 12:49:32 -0600 Received: (from arnold@localhost) by freefriends.org (8.14.7/8.14.7/Submit) id x7SInUE1024803; Wed, 28 Aug 2019 12:49:30 -0600 From: arnold@skeeve.com Message-Id: <201908281849.x7SInUE1024803@freefriends.org> X-Authentication-Warning: frenzy.freefriends.org: arnold set sender to arnold@skeeve.com using -f Date: Wed, 28 Aug 2019 12:49:30 -0600 To: tuhs@tuhs.org, doug@cs.dartmouth.edu References: <201908281841.x7SIfQS7053036@tahoe.cs.Dartmouth.EDU> In-Reply-To: <201908281841.x7SIfQS7053036@tahoe.cs.Dartmouth.EDU> User-Agent: Heirloom mailx 12.5 7/5/10 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Subject: Re: [TUHS] dmr streams & networking [was: Re: If not Linux, then what?] X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" Doug McIlroy wrote: > > Doug McIlroy wrote: > > > >> > >>> How long was research running on a PDP-11 and when did they move to a VAX? > >> > >> London and Reiser had ported Unix to the VAX, replete with virtual memory, in 1978. By the time v7 was released (1979), Vaxen had become the workhorse machines in Research. > >> > >> Doug > > > > So, what's the story on why the London/Reiser port didn't get adapted > > back by Research, and they ended up starting from 4.1 BSD? > > > > Thanks, > > > > Arnold > > Sorry, what I said about London/Reiser is true, but not the whole > story. L/R didn't have demand paging; BSD did. But my question still stands. Why didn't Research keep going from L/R and add demand paging? Wouldn't that have been "cleaner" than starting from BSD? Thanks, Arnold