From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Daniel P. Berrange" Subject: Re: virtio implementation? Date: Thu, 19 Jul 2007 03:37:11 +0100 Message-ID: <20070719023711.GG22907@redhat.com> References: <469C89BD0200005A00027AE1@mcclure.wal.novell.com> <1184715761.10380.37.camel@localhost.localdomain> <469DC7F2.8050909@redhat.com> <200707190148.21728.arnd@arndb.de> Reply-To: "Daniel P. Berrange" Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, Gerd Hoffmann To: Arnd Bergmann Return-path: Content-Disposition: inline In-Reply-To: <200707190148.21728.arnd-r2nGTMty4D4@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org On Thu, Jul 19, 2007 at 01:48:21AM +0200, Arnd Bergmann wrote: > On Wednesday 18 July 2007, Gerd Hoffmann wrote: > > Rusty Russell wrote: > > > You mean backend? =A0For networking it makes a great deal of sense. = =A0For > > > block it makes far less sense (COW, weird formats, etc). > > = > > For block you probably want both: =A0userspace driver which can handle = all > > sorts of funny image files, and a kernel driver doing a 1:1 mapping to a > > block device (lvm volume). > > = > = > Interestingly, once you have the kernel driver that maps a block device, > you can do most of the useful user scenarios by means of /dev/loop > and/or device mapper. If/when the 'DMLoop'[1] target for device mapper gets finished/merged that = could be a viable alternative to traditional loop devices Dan. [1] http://sources.redhat.com/lvm2/wiki/DMLoop -- = |=3D- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496= -=3D| |=3D- Perl modules: http://search.cpan.org/~danberr/ = -=3D| |=3D- Projects: http://freshmeat.net/~danielpb/ = -=3D| |=3D- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 = -=3D| = ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/