Re: [Xen-devel] Possible bug, gplpv / pv-netdev

["Bart Van Kerckhove" <bart@xxxxxxxx>]

> > >>> I'm running xen3.4.0 , and while using windows 2003 x64 and GPLPV (up 
> > >>> to
> > >>> 0.10.0.86) - I keep running into the following kernel error message 
> > >>> in
> > >>> dom0:
> > >>>
> > >>
> > >> Did you try another Xen version. Xen 3.4.1 should work better.
> > >
> > > Installing xen 3.4-testing as we speak.
> > > This bug has been haunting me since 3.0, so I have little hope it'll be
> > > fixed..
> > This will be a dom0 kernel issue, not a hypervisor issue, so upgrading 
> > only
> > Xen will not fix it.
I am running this off of the 2.6.18 kernel provided with xen.
Any loopholes I need to be aware of?

> Well... strictly speaking I think there is probably also a bug in GPLPV
> that causes a situation that also triggers a bug in the Dom0 kernel.
It can be considered to be a bug since it locks up domU, I suppose..

> During various stages of GPLPV development I have also been able to
> completely crash Dom0 (as in hang and/or reboot) from the DomU.
Isn't that supposed to be impossible?
These kind of bugs scare me, one compromised or malfunctioning domU taking 
down a whole system..
> I'm in the middle of investigating pvUSB support under GPLPV but once it
> at least doesn't crash I'll have a look at this network bug and see if I
> can find out what is causing it in DomU. Hopefully the fix in Dom0
> should then be obvious (unless of course GPLPV is actually doing the
> right thing and Dom0 just doesn't like more than one disable->enable
> transitions)
>
> James
Can anyone actually reproduce this bug?

Thanks,

-Bart 

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