From mboxrd@z Thu Jan 1 00:00:00 1970 From: Samuel Thibault Subject: Re: [RFC] PVFB: Add refresh period to XenStore parameters? Date: Thu, 1 May 2008 18:55:36 +0100 Message-ID: <20080501175536.GV4797@implementation.uk.xensource.com> References: <20080229120806.GA8268@implementation.uk.xensource.com> <873ar7ptvh.fsf@pike.pond.sub.org> <20080303191804.GA11699@implementation.uk.xensource.com> <873ar68spy.fsf@pike.pond.sub.org> <20080304144952.GA9230@implementation.uk.xensource.com> <873ar67anv.fsf@pike.pond.sub.org> <20080304161220.GA9852@implementation.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Return-path: Content-Disposition: inline In-Reply-To: <20080304161220.GA9852@implementation.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: Markus Armbruster , xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Hello, Getting back to that old issue. Samuel Thibault, le Tue 04 Mar 2008 16:12:20 +0000, a écrit : > > * If the frontend can track changes efficiently, it sends update > > messages to the backend, which can use them to only redisplay > > changed areas. > > Well, that was actually my next target :) > (but for that we badly need the resize/redepth support). > > However, that doesn't solve something that still bugs me, which is > that the VGA emulation layer wakes up every 30ms to just notice that > the width/height/depth registers didn't change etc. even if the actual > window is not shown. What could be done is to make the backend set request-update to 0 when the window is minimized, which makes the frontend understand that there is temporarily no need to send updates any more, and set it back to 1 when the window is restored. Would that be OK? Samuel