From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: Re: virtio implementation? Date: Thu, 19 Jul 2007 02:12:25 +0200 Message-ID: <200707190212.25826.arnd@arndb.de> References: <469C89BD0200005A00027AE1@mcclure.wal.novell.com> <200707190148.21728.arnd@arndb.de> <469EAA2B.40307@codemonkey.ws> 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: Anthony Liguori Return-path: In-Reply-To: <469EAA2B.40307-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org> Content-Disposition: inline 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 Thursday 19 July 2007, Anthony Liguori wrote: > > 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. > = > Not quite. =A0Using device mapper to implement something like qcow turns = > out to be pretty painful. = Right. Note that I said 'most scenarios', not all ;-) I don't understand enough about qcow to see why you can't do the same with simple dm snapshots, but I'm sure there is a reason to have it. Arnd <>< ------------------------------------------------------------------------- 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/