From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Arlen.D.Wang" Subject: Re: Re: Install paravirtualized drivers after bootingforhigh-performance IO Date: Tue, 10 May 2005 15:20:16 +0800 Message-ID: References: <200505091257.04034.mark.williamson@cl.cam.ac.uk> <200505100324.59377.mark.williamson@cl.cam.ac.uk> Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org What is the difference between paravirtualized and virtualized? DengYu Wang > Where is get a reference to the Windows support using Vanderpool > Technology ? The code in the unstable tree is the best reference (if you feel brave). There are the slides for a couple of talks about VT at the Xen Summit webpage (http://summit.xensource.com/presentations/). > Who is doing that Windows support using Vanderpool Technology ? This implementation work has been spearheaded by Intel, although I think there are also some people at IBM also working on Xen/VT (is that right?) > If Xen can run unmodified Linux , then Xen can run unmodified Windows also > , right ? Not yet: running Windows requires emulating extra 16 bit x86 stuff that Linux doesn't need in order to run. There is a design for supporting this and it might even be under development right now. HTH, Mark > DengYu Wang > > "Mark Williamson" > §Õ?:200505091257.04034.mark.williamson@cl.cam.ac.uk... > > > Hi there, > > > > I expect you've seen a reference to the Windows support using Vanderpool > > Technology? > > > > The current VT implementation provides an emulation of real hardware > > devices > > (e.g. an NE2000 ethernet card) to the guest OS. This has the advantage > > that > > you can boot an unmodified OS and it'll recognise the emulated devices > > and Just Work. This will allow you to install the OS using its usual > > installer > > and get things up and running. > > > > However, you pay a performance price for emulating a device like this. > > The > > most straightforward way to solve this is to replace the emulated device > > drivers with Xen-aware drivers (like the ones used by the Xen-native > > Linux port). Once you've installed the OS, you can upgrade to the Xen > > device drivers. > > > > This should give better bandwidth for things like disk and network IO. > > > > Does that help? > > > > Cheers, > > Mark > > > >> What is "high-performance IO" ? > >> What meaning for "Install paravirtualized drivers after booting for > >> high-performance IO"? > >> > >> Thanks, > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel