RE: [Xen-devel] Third release of GPL'd PV drivers for Windows

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

Have a look at the 'sent' date on my email. For some reason the Xen mailing 
lists re-post previous messages from time to time, just to keep us on our toes.

James

> -----Original Message-----
> From: Grabber [mailto:grabber@xxxxxxxxx]
> Sent: Tuesday, 20 November 2007 11:46
> To: James Harper
> Cc: Samuel Thibault; xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] Third release of GPL'd PV drivers for Windows
> 
> hum... the first binary release is 0.1.0 version of source code release?
> or it`s 0.3.0?
> 
> I`m confusing!
> 
> Regards,
> Luiz Vitor Martinez Cardoso.
> 
> 
> On Nov 9, 2007 10:20 AM, James Harper < james.harper@xxxxxxxxxxxxxxxx>
> wrote:
> 
> 
>       > James Harper, le Fri 09 Nov 2007 21:37:23 +1100, a écrit :
>       > > Windows appears to mostly give buffers aligned to a multiple of
>       > > 512 bytes (sector size) which may allow me to just grant Dom0
> access to
>       > > the page... although what happens to the other bytes in the
> page?
>       >
>       > They are untouched, so you can make the optimization, unless you
> are
>       > paranoid enough about information leakage and don't trust dom0.
> 
> 
>       Just tried it out. I'm not taking any metrics on how often the fast
> path is followed (eg how often Windows provides a buffer aligned to a 512
> byte boundry), but some clock watching shows that an operation that takes
> 16-19 seconds using the Qemu drivers takes 6-9 seconds using my PV
> drivers. The only issue so far is that while the PV drivers are doing
> their thing, Windows appears to get a bit starved for resources (appears
> to hang on occasion etc)... could be another bug causing that of course...
> 
>       James
> 
> 
>       _______________________________________________
>       Xen-devel mailing list
>       Xen-devel@xxxxxxxxxxxxxxxxxxx
>       http://lists.xensource.com/xen-devel
> 
> 
> 
> 
> 
> --
> Atenciosamente,
> Luiz Vitor.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel