From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: tuhs-bounces@minnie.tuhs.org X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.6 required=5.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE, T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.1 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id e356fc21 for ; Sun, 2 Sep 2018 08:07:37 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id DC8ABA1B10; Sun, 2 Sep 2018 18:07:36 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id C00B5A1A98; Sun, 2 Sep 2018 18:07:10 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b=AZHk31hk; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 0B23EA1A98; Sun, 2 Sep 2018 18:07:08 +1000 (AEST) Received: from mail-wm0-f54.google.com (mail-wm0-f54.google.com [74.125.82.54]) by minnie.tuhs.org (Postfix) with ESMTPS id F3979A1A90 for ; Sun, 2 Sep 2018 18:07:06 +1000 (AEST) Received: by mail-wm0-f54.google.com with SMTP id y139-v6so8620672wmc.2 for ; Sun, 02 Sep 2018 01:07:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=ySWJ7ilXulj4b2g+jqmOqID2Vm0MrH9IExdYXNyr0XQ=; b=AZHk31hk659d9AK0Q6MFJwexkFc89zPpbaR5m0qUQIsor6FiqiMoLVZEZaxv2I/C3J onBpk625NLYAC8aoSBe0+oT9wikDdK5aF2lhugq5ao9LuoCaH7L3h9Vf6ls57tfeSAH0 WaTsMt6ChLFOUrF6dY+kZtyfkbw5k2LRS5o2dvEn+xANyI6ZB4zjec3gnjx1KomcHf7F /XP6IgMY45dTvdhwVpOj9A0yXgphbsv5LjlWVdOUqsrmZjTb0vE5vqfmkr3fbobaC6Yz 9SyMLcXwEmDbSt+O1OqlOpXaS/rAmEpUaNXZHxrLy1jDsSLxmBAQiv4nqx4D9w8S8qzz TMzw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=ySWJ7ilXulj4b2g+jqmOqID2Vm0MrH9IExdYXNyr0XQ=; b=UcvM9km54lSs8NXjde15odiLocFLjEyqcrpOx0jALIvBWmODSFm/BKkMACE1CdaSiI oPJ3GWWFghbGKcgaXv8StgcZ6sFwhIfQ8wgLeyTHNUSuWLiUhuas6dwD7nxNPtMgJljy 8xfo53/HAm3KLirF6KETBTrrN6DTE2cIKKQtL+eUWlHBgAVNMjaCWwmZHhBQ4cwSaj8v lTlPfn8RbXjtCHBn+yBMngiF6rEaaB9eP8/I+eIVZhiKEWSanWWwwjy9Di/wQ/MUGn9d SqAW2oomVR4dDySg5SH5bQqi7ZmCuk+wboFQP1qUhTE5Dgma30xDDA9/xphn3qk0Ee37 ND7A== X-Gm-Message-State: APzg51B49I/WyYqHEAjMXL5KHrAbrwEouhjno6FPD7eoe/TmNID0ng/m ajwQYgEhJweSgP4y9zmA03A= X-Google-Smtp-Source: ANB0Vdaz4X7QU1TBROoC9/iTzNMM9wxW0bFDBFJG4mw1ecpCpec8jhMOrhAq9IXKN+knWUKro/BF7Q== X-Received: by 2002:a1c:b5d3:: with SMTP id e202-v6mr2068487wmf.23.1535875624777; Sun, 02 Sep 2018 01:07:04 -0700 (PDT) Received: from zippy.shellcode.eu (w-17.cust-14660.ip.static.uno.uk.net. [95.172.225.17]) by smtp.gmail.com with ESMTPSA id j133-v6sm10720306wmd.12.2018.09.02.01.07.03 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sun, 02 Sep 2018 01:07:04 -0700 (PDT) Date: Sun, 2 Sep 2018 09:07:02 +0100 From: Steve Mynott To: Andy Kosela Message-ID: <20180902080701.i5juplmwihwtppnp@zippy.shellcode.eu> References: <20180901185053.GA20993@mcvoy.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-OS: Linux zippy 4.9.0-5-amd64 User-Agent: NeoMutt/20170113 (1.7.2) Subject: Re: [TUHS] UVM VM system X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: TUHS main list Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On Sun, Sep 02, 2018 at 08:29:42AM +0200, Andy Kosela typed: > OpenBSD is also using uvm[1]. But these days it certainly differs from > NetBSD implementation as it was hacked on by different people during the > last several years. > > [1] https://man.openbsd.org/uvm.9 Both forks now include a unified buffer cache. There is an interesting series of blog posts at The OpenBSD UVM has particularly diverged from the original with the addition of a "dead entry queue" and the blog author complains about its lack of documentation. He also mentions an experimental RadixVM as being current "state of the art" although its not available on any mainstream systems. -- Steve Mynott cv25519/ECF8B611205B447E091246AF959E3D6197190DD5