Re: [Xen-devel] vif backend configuration times out

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2012-08-07 at 16:25 +0100, Olaf Hering wrote:
> On Tue, Aug 07, Ian Campbell wrote:
> 
> > On Mon, 2012-08-06 at 18:39 +0100, Olaf Hering wrote:
> > > With current xen-unstable 25733:353bc0801b11 the attached hvm.cfg does
> > > not start anymore with a SLES11SP2 dom0 kernel, but it starts if I run a
> > > 3.5 pvops dom0 kernel. I have no modifications other than the stubdom -j
> > > patch.
> > > 
> > > The output from this command is attached:
> > > xl -vvvv create -d -f /root/xenpaging/sles11sp2_full_xenpaging_local.cfg 
> > > 2>&1 | tee xl-create-`uname -r`.txt &
> > > 
> > > Any ideas how to fix this timeout error?
> > 
> > The tools are waiting for the backend to move from state 1
> > (XenbusStateInitialising) to state 2 (XenbusStateInitWait). A backend
> > driver typically makes that transition at the end of its probe function
> > -- what is the SLES11SP2 netback waiting for? Or is it failing to init,
> > in which case perhaps there is an error node in XS?
> 
> I think there is a difference between the two kernels. The pvops kernel
> goes into state 2 right away (I cant tell from repeated xenstore-ls runs
> if it had also state 1).
> The sles11 kernel remains in state 1.

What is it waiting for?

>  Did the expectations of libxl
> change recently? xl create used to work not too long ago.

I don't think the expectation has changed but the implementation is
probably more picky since Roger's hotplug patches.

> xm does not work either, so the change is most likely in the scripts.

If you are switching from xl to xm then you should either reboot or
remove libxl/disable_udev in xenstore manually.

Other than that nor much has changed in the scripts either. Are you sure
it isn't the kernel which has changed?

Ian.

> 
> Olaf



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