From mboxrd@z Thu Jan 1 00:00:00 1970 From: Samuel Thibault Subject: Re: [PATCH] ioemu: drop unused 4MB video memory Date: Mon, 14 Jul 2008 11:40:12 +0100 Message-ID: <20080714104012.GG4466@implementation.uk.xensource.com> References: <20080710161842.GP4536@implementation.uk.xensource.com> <18555.7635.793969.695013@mariner.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: Content-Disposition: inline In-Reply-To: <18555.7635.793969.695013@mariner.uk.xensource.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Ian Jackson Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Hello, Ian Jackson, le Mon 14 Jul 2008 10:35:15 +0100, a =E9crit : > Samuel Thibault writes ("[Xen-devel] [PATCH] ioemu: drop unused 4MB vid= eo memory"): > > ioemu: drop unused 4MB video memory > >=20 > > Since we only emulate the cirrus VGA video card which is only able to > > expose 4MB video memory, we don't need more than that. >=20 > I see this has gone into xen-unstable and also the new qemu-xen tree[1]= . >=20 > But it would be nice to understand the compatibility properties: > * Evidently it breaks when tools have this change but qemu-dm > doesn't. Yes. > Is there a way to avoid this being a fatal error ? Unfortunately VGA_RAM_SIZE is used in a lot of places of qemu so that'd be a bit hard. > * I think I'm correct to assume that this change is harmless for > a new qemu-dm and old tools ? Yes. > * What about save/restore ? Ah, right, we need a compatibility version for that, I'll work on it. Samuel