From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1SHleg-0007EN-HW for garchives@archives.gentoo.org; Wed, 11 Apr 2012 00:43:26 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 3F0B9E094A; Wed, 11 Apr 2012 00:43:07 +0000 (UTC) Received: from mail.hacking.co.uk (unknown [62.149.40.78]) by pigeon.gentoo.org (Postfix) with ESMTP id 017C1E0938 for ; Wed, 11 Apr 2012 00:42:53 +0000 (UTC) Received: from [10.0.0.73] (141.Red-88-21-90.staticIP.rima-tde.net [88.21.90.141]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by mail.hacking.co.uk (Postfix) with ESMTPSA id 2237C10078 for ; Wed, 11 Apr 2012 00:12:43 +0000 (GMT) Subject: Re: [gentoo-server] Toughts on Virtualization From: Hacking Networked Solutions - Gentoo List Subscriptions To: gentoo-server@lists.gentoo.org In-Reply-To: References: <86CEA8B2-BE0D-40DB-A047-604393956FEA@cc.if.ufrj.br> <1399613009.20120409193237@astafjev.com> <1334016816.13235.0.camel@max2.auckland.local> Content-Type: text/plain; charset="UTF-8" Date: Wed, 11 Apr 2012 02:42:51 +0200 Message-ID: <1334104971.13235.15.camel@max2.auckland.local> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-server@lists.gentoo.org Reply-to: gentoo-server@lists.gentoo.org Mime-Version: 1.0 X-Mailer: Evolution 2.32.2 Content-Transfer-Encoding: 7bit X-Archives-Salt: b0036706-f0c7-4287-bbbb-a4fd0989cad7 X-Archives-Hash: 4ef0f2be9b5572079182125596d14a27 On Tue, 2012-04-10 at 07:28 +0700, Pandu Poluan wrote: > > On Apr 10, 2012 7:15 AM, "Hacking Network Solutions - Gentoo List > Subscriptions" wrote: > > > > On Mon, 2012-04-09 at 19:32 +0300, Konstantin wrote: > > > > > > What kernel versions are you using for Dom0? Today I've tried to > use > > > sys-kernel/gentoo-sources-3.2.12 and couldn't find any backend > driver > > > support. Am I missed something? ;) > > > > > > > Hi Konstantin, > > > > I use Xen with Gentoo for both Dom0 and DomU. > > > > The back-end driver support is well hidden in the menus, > > > > Device Drivers ---> Xen driver support ---> Backend driver > support > > > > is required to show them. > > > > I have attached a working .config 3.2.12 for your convenience. > > > > My company also maintains a (still unfinished and now slightly out > of > > date unfortunately, but it is on my list of things to update) > document > > related to using Xen with Gentoo here: > > > > > http://www.mad-hacking.net/documentation/linux/deployment/xen/index.xml > > > > OMG! You're working there? Hats off to you guys, and max respect! > > I would never be able to deploy my Gentoo infrastructure had I not > read this : > > http://www.mad-hacking.net/documentation/linux/deployment/buildserver/index.xml > Thank you for the kind words - it's always nice to know that we've been able to help, especially with getting Gentoo more widely deployed in production/corporate environments. > > We also maintain ebuilds for the 4.0.2 branch of Xen in our overlay, > > which can be installed with layman (hacking-gentoo). > > > > Maybe this will be of some help, I hope so - if you have any > problems > > with Xen feel free to ask me. > > > > If you have any issues with the docs/ebuilds please email me off > list. > > > > Not an issue, just an honest question: Does having Gentoo as Dom0 > significantly improve performance? > I wish I could say - unfortunately we've only ever used Gentoo as our Dom0 distribution so have nothing to compare it against. Theoretically, distributions which are specifically customised for use as a Xen Dom0 _could_ be better from a performance standpoint as no doubt there must be some optimisations which can be made that would not be suitable for a more generic distribution. That said I would be very interested to know if any of them had actually been optimised in said fashion and if the requirements to still run as wide a range of software as possible on the Dom0 (equivalent to loads of USE flags) on a wide range of similar processors (equivalent to very generic CPU setting) actually hurts enough to still make Gentoo a better choice. My _guess_ is that it would, although we're probably talking fractions of a percent here not significant improvements unless the more generic distributions pay a particularly heavy price for their CPU tolerance. Max