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

[Mario <mario@xxxxxxxxxxxxxx>]

On 05/15/2011 07:03 PM, Pasi Kärkkäinen wrote:
> On Sun, May 15, 2011 at 06:41:25PM +0200, Mario wrote:
> > On 05/15/2011 06:34 PM, Pasi Kärkkäinen wrote:
> > > On Sun, May 15, 2011 at 06:24:11PM +0200, Mario wrote:
> > > > On 05/15/2011 06:12 PM, Pasi Kärkkäinen wrote:
> > > > > 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
> > > > Well, i have tried following kernels in domU:
> > > >
> > > > 2.6.31.6 (i got this one from stacklet)
> > > > 2.6.37.6-domU
> > > > 2.6.33.4-domU
> > > Are these pvops/vanilla or with some patches?
> > Those are pvops/vanilla, no patches.
> >
> >
> > > > 2.6.38.6-xen (dom0 kernel)
> > > > 2.6.34.7-xen (dom0 kernel)
> > > > 2.6.39-rc7-xen (dom0 kernel)
> > > >
> > > > None of them made any difference, they were all complaining about vif.
> > > > Yeah, I am running Xen 4.1
> > > Are you using xm/xend or xl/libxl toolstack?
> > I am using xl/libxl with Xen 4.1
> Ok. Have you tried Jeremy's xen.git xen/stable-2.6.32.x as a dom0 kernel?
> It would be interesting to know if that works for you or not.
>
> -- Pasi
I haven't, and since gentoo patched one works at the moment, I will 
stick to using that, since previously it has been working flawlessly.
If I get some more time for testing, i will try Jeremy's, but seeing 
that I am not the only one with this issue (Erwan reported the same 
problem) you should be able to get to the bottom of this without me, if 
you care about it anyway.


> > > -- 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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