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xen-devel
Re: [Xen-devel] Release 0.8.5 of GPL PV drivers for Windows
On Thu, Mar 13, 2008 at 10:49:14PM +1100, James Harper wrote:
> I've just uploaded 0.8.5. Please uninstall all the 0.8.4 drivers first
> or you'll get BSoD's on attempting the upgrade. I'm sure there's a way
> to make this a bit cleaner (eg require a reboot instead of crashing) but
> I don't know how at this point.
>
> Download from http://www.meadowcourt.org/WindowsXenPV-0.8.5.zip
>
> Major changes are:
> . TCP large send offload and other performance enhancements
> . The system should crash with a BSoD if it fails to 'hide' the Qemu
> Intel IDE device, which is much better than silent corruption.
> . Fixes to the above hiding to properly detect the PCI Bus device driver
> under non-English languages
> . Beginnings of suspend (required for migration). The Suspend part
> appears to work, but the resume doesn't.
>
> I have a feeling that the large send offload stuff is breaking local (eg
> inside Dom0's bridge) communications, as the packets stay 'large' until
> they leave via a physical adapter. Windows doesn't like receiving
> packets larger than the MTU (and Wireshark causes a BSoD). Unless I can
> find an alternative I'll have to have the Windows xennet driver break
> them up itself, which might erode any performance benefit.
>
Hmm.. is it possible to set the MTU for xennet? Does it support Jumbo frames
(MTU 9000)?
-- Pasi
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