Re: [Xen-users] PV drivers to improve performance

[Marc Patino Gómez <mpatino@xxxxxxxxxxxx>]

Hi James,

James Harper wrote:
> > Hi folks,
> >
> > I know that exist PV drivers for Windows on Xensource products, and
> > these drivers improve the disk and network performance of HVM windows
> > guests. Anybody knows how much?
> >
> >     
> How much performance improvement or how much cost?
>   
how much improvement
> The PV drivers for xensource only appear to work on xensource products, not 
> with the open sourced version of Xen.
>   
I know... :(
> I'm attempting to write some PV drivers for Windows which will be open sourced 
> (GPL). I'm struggling to find the time just lately but am making reasonable 
> progress... I have a PCI driver which creates a windows bus, and the beginnings 
> of a XenStore driver that attaches to it. At some point soon I hope to be able 
> to get a 'clean shutdown' working (eg 'xm shutdown' will actually shut down a 
> windows machine instead of pulling the plug on it).
>   
Please can you give me some pointers about how to make PV drivers? I 
will be very interested to know a little bit more how they works. Any 
idea about PV drivers for FreeBSD?
Thanks,

Marc
> James
>
>
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>   

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