Re: [Xen-devel] [PATCH 05 of 15 v2] docs: add a document describing the xl cfg file syntax

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

Looks ok to me.

  Paul

> -----Original Message-----
> From: Ian Campbell
> Sent: 25 November 2011 16:39
> To: Paul Durrant
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; Ian Jackson
> Subject: RE: [Xen-devel] [PATCH 05 of 15 v2] docs: add a document
> describing the xl cfg file syntax
> 
> On Fri, 2011-11-25 at 15:16 +0000, Paul Durrant wrote:
> > > -----Original Message-----
> > > From: Ian Campbell
> > > Sent: 25 November 2011 15:06
> > > To: xen-devel@xxxxxxxxxxxxxxxxxxx
> > > Cc: Ian Jackson; Paul Durrant
> > > Subject: Re: [Xen-devel] [PATCH 05 of 15 v2] docs: add a
> document
> > > describing the xl cfg file syntax
> > >
> > > Paul,
> > >
> > > On Fri, 2011-11-25 at 14:49 +0000, Ian Campbell wrote:
> > > >
> > > > +=item B<viridian=BOOLEAN>
> > > > +
> > > > +Turns on or off the exposure of MicroSoft Hyper-V (AKA
> viridian)
> > > > +compatible enlightenments to the guest.  These can improve
> > > > performance
> > > > +of Microsoft Windows guests (XXX which versions of Windows
> > > benefit?)
> > >
> > > Is there anything else we can say here? What are the first
> versions
> > > of Windows which benefit from this?
> > >
> >
> > Ian,
> >
> >   I think that's probably good enough. AFAIK viridian
> enlightenments
> > came in with the 6.0 kernel in Vista/2K8 but having the flag on
> should
> > do no harm for older kernels.
> 
> How about this incremental patch?
> 
> diff -r b4c07fbe3557 docs/man/xl.cfg.pod.5
> --- a/docs/man/xl.cfg.pod.5   Fri Nov 25 15:11:30 2011 +0000
> +++ b/docs/man/xl.cfg.pod.5   Fri Nov 25 15:23:14 2011 +0000
> @@ -555,7 +555,13 @@ Windows L<http://wiki.xen.org/wiki/XenWi
> 
>  Turns on or off the exposure of MicroSoft Hyper-V (AKA viridian)
> compatible enlightenments to the guest.  These can improve
> performance -of Microsoft Windows guests (XXX which versions of
> Windows benefit?)
> +of Microsoft Windows guests from Windows Vista and Windows 2008
> onwards
> +and setting this option for such guests is strongly recommended.
> This
> +option should be harmless for other versions of Windows (although
> it
> +won't give any benefit) and the majority of other non-Windows OSes.
> +However it is known to be incompatible with some other Operating
> +Systems and in some circumstance can prevent Xen's own
> +paravirtualisation interfaces for HVM guests from being used.
> 
>  =back
> 
> 

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