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=-0.6 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,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 92a41657 for ; Wed, 28 Aug 2019 21:55:44 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id DDEC79BF7F; Thu, 29 Aug 2019 07:55:43 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 0D8079BD79; Thu, 29 Aug 2019 07:55:23 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="CQlVmsrj"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 6C2A99BD3C; Thu, 29 Aug 2019 07:55:18 +1000 (AEST) Received: from mail-vs1-f65.google.com (mail-vs1-f65.google.com [209.85.217.65]) by minnie.tuhs.org (Postfix) with ESMTPS id 151C59BDD7 for ; Thu, 29 Aug 2019 07:55:12 +1000 (AEST) Received: by mail-vs1-f65.google.com with SMTP id b20so1068238vso.1 for ; Wed, 28 Aug 2019 14:55:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=OtTUWWQ38GrkC90Li1CFTQJwvSSH2n4VYj0/F3O7gFk=; b=CQlVmsrjrSLYB/2xv4KedLX3Kp7GOB8/6OvFIwN/FQOfs1/RjjdTqCB9b0YAKY2eNL 1DSGTX2JrKTDGmZm5hLIByqx76/JImlEC1VX2dGIjSmNs3euk+6jxNoTlZN0HankG8hS N0+meMBmkGerfjaJyFaKsRgYx+op74BqGFoH7GJWJRI5awIV3APfBXZDOTAth7F8n4f+ pjFaYd9CeeA6VCzLPsvsu8irqNPJhe5EE7vvV/nTedjLFGMG7jjVGnvFiHEhFTQ2cOMv C0lqkGazLby1shnJMHe4JjGOpT5ZIsThOkcpZXSchgTDb4NEogltb4clpQAVTO0ABFxa bw0w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=OtTUWWQ38GrkC90Li1CFTQJwvSSH2n4VYj0/F3O7gFk=; b=q99VX3bWUn5rnT8Us9NrzZclHHx2PcrEnRAj/dVC+6HnGxJXuRFzWvzLY/nHGwOGNw suUCroPwCm8dHqaATXxtbAprd+4OsWSNwzdQMI4N4jKrKLWFAuFuG6JNioytrs4/sT8H c/tNQpNVCct/v2m7/OQ0ZgwoIghW4CxOrVTSebyT/zBwzICpkjyOranBmilSJgNWriW5 gm7EMv1d65H5DSXP2PfDBbc0GFn5UVlEAkrBEqq+ykOq3hUEJn9YSrIpOxTx8RZzxZdp SSki53kW1WtnT7oqKa2R7hinubxUaoPkSrgwxSTeW67gTVc7N/v7xTeeui0CvD9eeJA8 WHNQ== X-Gm-Message-State: APjAAAVBrnMgMU4kxYE6j4ee2XJgALsnhKu/9Dj6HzAbxkgNrxarwZbR 5fC6UFK/MmCeX4wD/eLL5lTCdktv3fu7i1bj+ho= X-Google-Smtp-Source: APXvYqxRaPKU0VcFjAcWSigSbvmkRl7W1Lulb/QJDyH4XangE7nQ9HVbJLfGny9oQHcqPNxngDHYK+d4vp+vSmFrNJU= X-Received: by 2002:a67:ee4f:: with SMTP id g15mr3821958vsp.164.1567029311312; Wed, 28 Aug 2019 14:55:11 -0700 (PDT) MIME-Version: 1.0 References: <201908281841.x7SIfQS7053036@tahoe.cs.Dartmouth.EDU> In-Reply-To: <201908281841.x7SIfQS7053036@tahoe.cs.Dartmouth.EDU> From: Rob Pike Date: Thu, 29 Aug 2019 07:55:00 +1000 Message-ID: To: Doug McIlroy Content-Type: multipart/alternative; boundary="0000000000007416f705913471b3" 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: , Cc: The Eunuchs Hysterical Society Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" --0000000000007416f705913471b3 Content-Type: text/plain; charset="UTF-8" Reiser added paging and it was working well by early 1981. -rob On Thu, Aug 29, 2019 at 4:41 AM 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. > > Doug > > --0000000000007416f705913471b3 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Reiser added paging and it was working well by early 1981.=

-rob


On Thu, Aug 29, 2019 at 4:41 A= M Doug McIlroy <doug@cs.dartmou= th.edu> wrote:
> Doug McIlroy <doug@cs.dartmouth.edu> wrote:
>
>>
>>> How long was research running on a PDP-11 and when did they mo= ve 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.

Doug

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