Xen users - Jul 2011 - [GPLPV] Xennet device issues on Win2k3 x32 DomU/Disabling just one PV device

Hi there.

I have been dealing with a conundrum off and on with a VPS of mine. Windows
2003 Standard 32 bit on a Xen HVM instance. Been trying to get the GPLPV
drivers working to help boost performance but always seem to run into one
major issue: The PV network device looks like it works but actual
connectivity is non-existant. Everything else in the GPLPV driver suite
works fine.

What I want to know is if it is possible to just disable the network device
part of GPLPV and revert it to the Qemu network card or if it is an all or
nothing deal? While getting the core problem actually fixed would be cool,
it is starting to look more and more like a host issue and, unfortunately,
trying to get anything beyond real basic support tasks accomplished is like
pulling teeth. And anything needing interaction with THEIR host I might as
well be talking to a brick wall (This is more or less a case of ''You
get
what you pay for''. I''m willing to deal with the support issues
as 99% I can
sort on my own and the costs are hard to ignore. But this is besides the
point and would rather not discuss what I am already aware of).

Thanks!


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You can just not install xennet driver. If you have already installed
you''ll need to remove xennet and modify a few registry keys so that
xenpci doesn''t turn off the qemu network cards.

Sent from my iPhone

On 28/07/2011, at 13:55, "Vchat20" <vchat20@gmail.com> wrote:
> Hi there.
> 
> I have been dealing with a conundrum off and on with a VPS of mine. Windows
2003 Standard 32 bit on a Xen HVM instance. Been trying to get the GPLPV drivers
working to help boost performance but always seem to run into one major issue:
The PV network device looks like it works but actual connectivity is
non-existant. Everything else in the GPLPV driver suite works fine.
> 
> What I want to know is if it is possible to just disable the network device
part of GPLPV and revert it to the Qemu network card or if it is an all or
nothing deal? While getting the core problem actually fixed would be cool, it is
starting to look more and more like a host issue and, unfortunately, trying to
get anything beyond real basic support tasks accomplished is like pulling teeth.
And anything needing interaction with THEIR host I might as well be talking to a
brick wall (This is more or less a case of ''You get what you pay
for''. I''m willing to deal with the support issues as 99% I can
sort on my own and the costs are hard to ignore. But this is besides the point
and would rather not discuss what I am already aware of).
> 
> Thanks!
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
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Thanks for the response. At this point it is kinda a messy install so I am
going to attempt to repair the install of the GPLPV drivers so it is fully
operating including the xennet driver. Any idea what I would actually edit
in the registry to re-enable just the qemu network card?

On Thu, Jul 28, 2011 at 12:51 AM, James Harper <
james.harper@bendigoit.com.au> wrote:
> You can just not install xennet driver. If you have already installed
> you''ll need to remove xennet and modify a few registry keys so
that xenpci
> doesn''t turn off the qemu network cards.
>
> Sent from my iPhone
>
> On 28/07/2011, at 13:55, "Vchat20" <vchat20@gmail.com>
wrote:
>
> > Hi there.
> >
> > I have been dealing with a conundrum off and on with a VPS of mine.
> Windows 2003 Standard 32 bit on a Xen HVM instance. Been trying to get the
> GPLPV drivers working to help boost performance but always seem to run into
> one major issue: The PV network device looks like it works but actual
> connectivity is non-existant. Everything else in the GPLPV driver suite
> works fine.
> >
> > What I want to know is if it is possible to just disable the network
> device part of GPLPV and revert it to the Qemu network card or if it is an
> all or nothing deal? While getting the core problem actually fixed would be
> cool, it is starting to look more and more like a host issue and,
> unfortunately, trying to get anything beyond real basic support tasks
> accomplished is like pulling teeth. And anything needing interaction with
> THEIR host I might as well be talking to a brick wall (This is more or less
> a case of ''You get what you pay for''. I''m
willing to deal with the support
> issues as 99% I can sort on my own and the costs are hard to ignore. But
> this is besides the point and would rather not discuss what I am already
> aware of).
> >
> > Thanks!
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@lists.xensource.com
> > http://lists.xensource.com/xen-users
>

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> 
> Thanks for the response. At this point it is kinda a messy install so I am
> going to attempt to repair the install of the GPLPV drivers so it is fully
> operating including the xennet driver. Any idea what I would actually edit
in
> the registry to re-enable just the qemu network card?
> 
You need to uninstall the xennet driver - this should be doable from add/remove
programs but I've never tried removing an individual driver before.

Once you do that, you need to undo the following that were set from the inf
file:

HKLM,"SYSTEM\CurrentControlSet\Services\XenPCI\Parameters",
"hide_devices", 0x00010008, "#vif#"
HKLM,"SYSTEM\CurrentControlSet\Services\XenPCI\Parameters",
"hide_devices", 0x00010008, "VEN_10EC&DEV_8139"
; tell Qemu to hide stuff
HKLM,"SYSTEM\CurrentControlSet\Services\XenPCI\Parameters",
"qemu_hide_flags", 0x00010008, 2

So go into HKLM\SYSTEM\CurrentControlSet\Services\XenPCI\Parameters and remove
"#vif" and "VEN_10EC&DEV_8139" from the hide_devices
key, and remove "2" from qemu_hide_flags. On the next boot, xenpci
shouldn't hide the qemu network interface.

James

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