From owner-freebsd-stable@FreeBSD.ORG Sat Mar 24 02:29:54 2007 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 88D6A16A402 for ; Sat, 24 Mar 2007 02:29:54 +0000 (UTC) (envelope-from nikolas.britton@gmail.com) Received: from an-out-0708.google.com (an-out-0708.google.com [209.85.132.249]) by mx1.freebsd.org (Postfix) with ESMTP id 4496813C448 for ; Sat, 24 Mar 2007 02:29:54 +0000 (UTC) (envelope-from nikolas.britton@gmail.com) Received: by an-out-0708.google.com with SMTP id c24so1467431ana for ; Fri, 23 Mar 2007 19:29:53 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=POE9YB60f2rlzUtI5I0Xi5fGJ3JkaAmlgYDEE5q7Ec//pW3kmewwqVRMv9kdSMWuSAQh1c+8Xgxpdw+OwYJNSI0VBwNHU6E+qLcFdwexNcm9CcFTe5dbjqSfWp4WTpbmaTjxm67kkXSmtmIGLnja+27JaL9RwwWOPC6f90U40nk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=Z8Lop8+cJlKqpj4nAEyJQL1P6UVD/HqU4AEP1STHBlE8AmgkCSoxh7vbU9TfRmvtjGfbIn7bjjIkqud05uV8DbpsYZ0Pbgg/ap4VPScFEzw6+bes0r24u0gEaXmlAPWUYvMRuxNpHi2FburK36pZIhMRo6UDBxbwHe/67bfV/VU= Received: by 10.100.191.5 with SMTP id o5mr3202937anf.1174703392881; Fri, 23 Mar 2007 19:29:52 -0700 (PDT) Received: by 10.100.32.17 with HTTP; Fri, 23 Mar 2007 19:29:52 -0700 (PDT) Message-ID: Date: Fri, 23 Mar 2007 21:29:52 -0500 From: "Nikolas Britton" To: "Kip Macy" In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <45F6E572.3070706@quip.cz> Cc: freebsd-stable@freebsd.org, Miroslav Lachman <000.fbsd@quip.cz>, Ivan Voras Subject: Re: Xen Dom0, are we making progress? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 24 Mar 2007 02:29:54 -0000 On 3/13/07, Kip Macy wrote: > > I know you were working on Xen support in FreeBSD, but web about it > > (http://www.fsmware.com/xenofreebsd/7.0/STATUS) has one year old info > > (support planned in FreeBSD 6.1). So is there any progress, or Xen will > > not be in any near future release? > > Basically Xen did not mature in the fashion that I anticipated. As far > as I can tell it is really only good for server consolidation for > large Linux distro vendors. You need to have what amounts to a private > branch. The xen developers don't appear to understand the importance > of interface versioning. They broke ABI compatibility going from 3.0.2 > -> 3.0.3 (trivial to fix, but that is not the point). When last I > worked on it, they had one branch that was in constant flux and > another branch that only received minor bug fixes and was 18 months > behind from a functionality standpoint (think 5.x / 4.x). There are > numerous other logging / supportability issues that I think are only > addressed by the major distros. As it stood 6 months ago, unless you > understood the internals of various bits of the code, there was no way > of diagnosing failures due to a misconfiguration. > > This is not to say that it isn't cool technology, but rather that > isn't going to be useful for the things I wanted to use it for so my > time is being directed elsewhere. If I ever have a need for EC2 I may > look at it again. > > One of the guys who ported FreeBSD to the xbox has expressed interest > - so something may yet come of it. > > I'm happy to provide technical support to an individual who is largely > self-sustaining in working on the code. > What about implementing something like DragonFly BSD virtual kernels? Matthew Dillon talks about it in is bsdtalk interview: http://cisx1.uma.maine.edu/~wbackman/bsdtalk/bsdtalk098.mp3 I suppose it's sorta like linux compat / windows on windows / coLinux... Towards the end of the interview he talk about it being extremely easy to implement: 1. signal mailboxes. 2. memory map / virtual page table support. 3. vm space management.