Re: [Xen-users] PV networking issue in 2.6.38.6 and 2.6.39-rc7

[Erwan RENIER <erwan.renier@xxxxxxxxxxx>]

I did the test too with vanilla kernel a while ago and ran into the same 
problem, thought i didn't search it out.
Instead i used the konrad xen kernel wich is 2.6.38-8 and works fine ( 
almost ^^ ).
I suppose he made adjustment on the network stack and it should be good 
to check the diffs with the vanilla kernel to find out.
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git


Le 15/05/2011 18:12, Pasi Kärkkäinen a écrit :
> On Sun, May 15, 2011 at 06:02:02PM +0200, Mario wrote:
> > On 05/15/2011 05:53 PM, Pasi Kärkkäinen wrote:
> > > On Sun, May 15, 2011 at 02:36:11PM +0200, Mario wrote:
> > > > Hey everyone,
> > > >
> > > > I have been trying to make Xen-4.1.0 work on kernels mentioned in the
> > > > subject, without much sucess. HVM guests are not affected, only PV.
> > > Below you mention gentoo xenlinux patches..
> > >
> > > So please be more specific about which kernel was vanilla (pvops),
> > > and which kernels had some external patches applied..
> > >
> > > -- Pasi
> > Sorry, both kernels in subject were vanilla from kernel.org, with xen
> > options selected for dom0 usage.
> > I only wanted to point out that networking works if i use kernel patched
> > with rebased gentoo patches.
> > I am talking only about dom0 kernel here, domU kernel does not seem to
> > be the source of the problem.
> OK. What kernel is the PV domU running? What Xen version are you using? 4.1 ?
>
> -- Pasi
>
> > > > Error that i see in dmesg on the domU:
> > > > XENBUS: Timeout connecting to device: device/vif/0 (state 1)
> > > >
> > > > ifconfig -a on domU shows MAC address: 00:00:00:00:00:00
> > > >
> > > > dom0 doesn't have any vif/tap interfaces assigned to domU when i do
> > > > brctl show or ifconfig -a
> > > >
> > > > I don't see any errors worth mentioning in /var/log/xen, except mybe
> > > > these two:
> > > >
> > > > /tmp/SBo/xen-4.1.0/tools/ioemu-qemu-xen/hw/xen_blktap.c:628: Init blktap
> > > > pipes
> > > > Could not open /var/run/tap/qemu-read-2
> > > >
> > > > Problem goes away when i boot 2.6.34.7 (it is the last kernel that i
> > > > have built with gentoo rebased patches).
> > > >
> > > > If there is something i can do to help debug this please do let me know.
> > > >
> > > >
> > > > Best regards,
> > > > mario
> > > >
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