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Re: [Xen-users] Windows 2008

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Windows 2008
From: Mark Williamson <mark.williamson@xxxxxxxxxxxx>
Date: Sat, 3 May 2008 18:42:19 +0100
Cc: Venefax <venefax@xxxxxxxxx>, Tomasz Chmielewski <mangoo@xxxxxxxx>, Nick Couchman <Nick.Couchman@xxxxxxxxx>
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> There are rumors that 2k8 will support Paravirtualization, but I have yet
> to see anything to confirm that and haven't found it in my testing of 2k8.

Novell submitted an initial patch to support hypercalls that can be used by 
Enlightened Windows 2008 Server: http://markmail.org/message/x2qmcrmdiujtzncr

There's been at least one subsequent revision of these patches.  I'm not sure 
that they've got PV device drivers working yet.  The patches add an adaptor 
to the Xen hypervisor to enable it to handle MS hypercalls where appropriate, 
in parallel to the existing Xen interface.

I've not seen any performance measurements from these patches yet and it seems 
likely that some of the hypercalls from the original patch will be dropped 
due to not providing significant / measurable benefits.

I'm not clear whether "Enlightened 2008 Server" is some kind of sub-version 
of "2008 Server" or whether Enlightenment support is included by default.


> -Nick
> >>> On Fri, May 2, 2008 at  9:15 AM, Tomasz Chmielewski <mangoo@xxxxxxxx>
> >>> wrote:
> Venefax schrieb:
> > Is there a "xenified" version of Windows 2008 Server? If not, are there
> > any special drivers to make it run fast? I intend to use either Suse or
> > Red Hat 5.1, 64 Bits. But I run SQL Server and I am afraid of the
> > performance hit.
> Search for "GPL PV drivers" on this and xen-devel lists.
> --
> Tomasz Chmielewski
> http://wpkg.org
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