Xen users - May 2010 - Upgrade to xen 4 Error: Device 0 (vif) could not be connected. Hotplug scripts not working.

Dear list,

I''m running Debian Lenny with xen build from source completely.
After upgrading xen to 4 with 2.6.32.12 kernel any paravirtualized domU 
hangs and after some minutes it breaks with:

Error: Device 0 (vif) could not be connected. Hotplug scripts not working.

There isn''t any log entry regarding this error.

When I switch back to 3.4.2 with 2.6.18 kernel anything boots fine.
Any Ideas?
Thank you and best regards

Ralf



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Hi Mark,

Mark Pryor schrieb:
> Your config may have some xen objects built as modules, so your system
> hangs unless they are loaded separately. 
>
> $ sudo ls -b /sys/class/misc/
> blktap-control   device-mapper  evtchn  gntdev  network_latency     pktcdvd
rfkill    tun
> cpu_dma_latency  ecryptfs       fuse    hpet    network_throughput  psaux  
snapshot  vga_arbiter
>   
Any of the above modules listed (xen related) exists in /sys/class/misc 
on my System:

2.6.32.12:
# blktap-control  cpu_dma_latency  device-mapper  evtchn  gntdev  
mcelog  microcode  network_latency  network_throughput  nvram  psaux  
vga_arbiter

2.6.18.8:
# blktap-control  device-mapper  evtchn  mcelog  microcode  nvram  
pci_iomul  psaux

The only different between the working kernel and non-working kernel is  
"pci_iomul" that doesn''t exist in the 2.6.32 kernel.

However, I only overwrite the xen-3.4.2 with xen-4.0 userland, so can 
there exist some conflicting files, that need to be removed?
Regards

Ralf

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I had the same problem with ubuntu. Upgrading udev packaged solved the problem.


On Sun, May 16, 2010 at 3:20 PM, Ralf Hornik Mailings
<ralf@best.homeunix.org> wrote:
> Hi Mark,
>
> Mark Pryor schrieb:
>>
>> Your config may have some xen objects built as modules, so your system
>> hangs unless they are loaded separately.
>> $ sudo ls -b /sys/class/misc/
>> blktap-control   device-mapper  evtchn  gntdev  network_latency
>> pktcdvd  rfkill    tun
>> cpu_dma_latency  ecryptfs       fuse    hpet    network_throughput
 psaux
>>    snapshot  vga_arbiter
>>
>
> Any of the above modules listed (xen related) exists in /sys/class/misc on
> my System:
>
> 2.6.32.12:
> # blktap-control  cpu_dma_latency  device-mapper  evtchn  gntdev  mcelog
>  microcode  network_latency  network_throughput  nvram  psaux  vga_arbiter
>
> 2.6.18.8:
> # blktap-control  device-mapper  evtchn  mcelog  microcode  nvram
 pci_iomul
>  psaux
>
> The only different between the working kernel and non-working kernel is
>  "pci_iomul" that doesn''t exist in the 2.6.32 kernel.
>
> However, I only overwrite the xen-3.4.2 with xen-4.0 userland, so can there
> exist some conflicting files, that need to be removed?
> Regards
>
> Ralf
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>
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