Date: Mon, 15 Oct 2007 16:20:29 -0700 From: Freddie Cash <fjwcash+freebsd@gmail.com> To: current@freebsd.org Cc: Michael Neumann <mneumann@ntecs.de> Subject: Re: Xen Status : FreeBSD-current as Dom/U. Message-ID: <200710151620.29832.fjwcash%2Bfreebsd@gmail.com> In-Reply-To: <4713F2F1.4090608@ntecs.de> References: <48344.172.16.9.1.1192472836.squirrel@www.xtra-net.be> <200710151335.27991.fjwcash%2Bfreebsd@gmail.com> <4713F2F1.4090608@ntecs.de>
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On October 15, 2007 04:08 pm Michael Neumann wrote: > Freddie Cash schrieb: > > On October 15, 2007 11:27 am Vincent Blondel wrote: > >> I am trying to install FreeBSD-current as Dom/U on my Core2 Quad > >> server hosting Linux Ubuntu 7.10 as Dom/0. > > > > Is that a quad-core CPU or a quad-CPU system? > > > > If it's a quad-core CPU, it should support Intel hardware > > virtualisation feature. If it does, you don't need any Xen patches > > or support in FreeBSD. Just create a Xen VM that supports hardware > > virtualisation (not a paravirtualised VM) and install FreeBSD as per > > normal. That's the beauty of the Intel VT and AMD VX (or whatever > > they call it now) features -- no need to patch an OS to run in a Xen > > VM. > > Does anybody know if there are big differences in performance > of running an unchanged OS under Xen with hardware virtualization > turned on vs. a paravirtualized OS? Or any other problems with an > unchanged OS using hardware virtualization? If not, then this is > clearly the way to go! Haven't tested it yet, personally. We're trying to track down a Tyan motherboard that will support AMD CPUs=20 with hardware virtualisation, with hardware support for Debian Linux 4.0=20 and FreeBSD 6.2. Once we have that, then we're going to start testing=20 running Xen with a Debian host, Debian guests (paravirtualised and full=20 virtualised), and FreeBSD guests (para and full). =46rom what I've read online, full virtualised Xen VMs with Xen 3.0.3 is=20 slower than paravirtualised Xen VMs. However, I can't find a definite=20 answer to what "slower" is. :) =2D-=20 =46reddie Cash, LPIC-2 CCNT CCLP Network Support Technician School District 73 (250) 377-HELP [377-4357] fjwcash+freebsd@gmail.com
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