Xen users - Jun 2011 - ubuntu kernels 2.6.39+ don''t boot as hvm domU

Hi!

I tried booting ubuntu natty/oneiric domUs with 2.6.39 and 3.0rc1
linux-image packages, but they all "just stop" after the kernel is
loaded and the init process should take over.

The problem must be within the linux-image package, since natty domUs
with the standard 2.6.38 kernel boot just fine.
I also have debian and gentoo domUs running 2.6.39 without issues, so
it''s definately an ubuntu issue.

I know, this list is for general xen usage, but I already filed a bug
report @ubuntu (didn''t receive a response yet) and just wanted to know
if anybody has come accross this issue?

kind regards, Mark

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Try to wait at that point for some time. It should return to init 
console. Maybe init is trying to boot non-existing/misconfigured device.

Mark Dokter wrote:
> Hi!
> 
> I tried booting ubuntu natty/oneiric domUs with 2.6.39 and 3.0rc1
> linux-image packages, but they all "just stop" after the kernel
is
> loaded and the init process should take over.
> 
> The problem must be within the linux-image package, since natty domUs
> with the standard 2.6.38 kernel boot just fine.
> I also have debian and gentoo domUs running 2.6.39 without issues, so
> it''s definately an ubuntu issue.
> 
> I know, this list is for general xen usage, but I already filed a bug
> report @ubuntu (didn''t receive a response yet) and just wanted to
know
> if anybody has come accross this issue?
> 
> kind regards, Mark
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
-- 
Martins Lazdans

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On 6/6/11 4:32 PM, Martins Lazdans wrote:
> Try to wait at that point for some time. It should return to init
> console. Maybe init is trying to boot non-existing/misconfigured device.
> 
I left it over night, but there was still nothing. No change at the
console (serial, vnc) and no ping response.
I also tried the xen_emul_unplug=never kernel parameter because I
thought there might be an issue with the xen pv-hvm drivers, but that
wasn''t the case.
I did not change anything but the kernel image with the result that
2.6.38 boots and 2.6.39 or 3.0rc1 do not.

Mark

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Am 06.06.2011 17:00, schrieb Mark Dokter:
> On 6/6/11 4:32 PM, Martins Lazdans wrote:
>> Try to wait at that point for some time. It should return to init
>> console. Maybe init is trying to boot non-existing/misconfigured
device.
>>
>
> I left it over night, but there was still nothing. No change at the
> console (serial, vnc) and no ping response.
> I also tried the xen_emul_unplug=never kernel parameter because I
> thought there might be an issue with the xen pv-hvm drivers, but that
> wasn''t the case.
> I did not change anything but the kernel image with the result that
> 2.6.38 boots and 2.6.39 or 3.0rc1 do not.
Just to follow up on this: gentoo-patched 2.6.39 (and 2.6.39-r1) have 
the same behaviour, i.e. I can''t get them to boot as PV-on-HVM-kernels 
with a configuration that works for 2.6.38.

The result I''m seeing is that the genkernel-generated ramdisk starts 
scanning for modules, but when reaching either uhci_ucd (to scan for), 
or dm-mirror/dm-snapshot (when usb is disabled), freezes at that point.

In the Dom0 I can see one CPU core of the DomU fully pegged, but other 
than that, the system becomes completely unresponsive.

If there''s interest in the config, I can post that.

For now, I''ve stuck with 2.6.38.

-- 
--- Heiko.

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On Fri, Jun 10, 2011 at 1:20 PM, Heiko Wundram <modelnine@modelnine.org>
wrote:
> Am 06.06.2011 17:00, schrieb Mark Dokter:
>>
>> On 6/6/11 4:32 PM, Martins Lazdans wrote:
>>>
>>> Try to wait at that point for some time. It should return to init
>>> console. Maybe init is trying to boot non-existing/misconfigured
device.
>>>
>>
>> I left it over night, but there was still nothing. No change at the
>> console (serial, vnc) and no ping response.
>> I also tried the xen_emul_unplug=never kernel parameter because I
>> thought there might be an issue with the xen pv-hvm drivers, but that
>> wasn''t the case.
>> I did not change anything but the kernel image with the result that
>> 2.6.38 boots and 2.6.39 or 3.0rc1 do not.
>
> Just to follow up on this: gentoo-patched 2.6.39 (and 2.6.39-r1) have the
> same behaviour, i.e. I can''t get them to boot as PV-on-HVM-kernels
with a
> configuration that works for 2.6.38.
>
Can you try with 3.0-rc2 or later? There were some fixes added.

Also, there were some VGA patches that didn''t make it into 3.0

but that are in:
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git stable/2.6.39.x

http://xen.markmail.org/search/?q=konrad+date%3A201106+vga#query:konrad%20date%3A201106%20vga+page:1+mid:cxe4dhs7mleuo2x5+state:results

Failing those. Please post the logs to the xen-devel mailing list with
the details of the problem including the kernel details.

Don''t be afraid to post to xen-devel, but do read:
http://wiki.xensource.com/xenwiki/AskingXenDevelQuestions

Thanks,
Todd
> The result I''m seeing is that the genkernel-generated ramdisk
starts
> scanning for modules, but when reaching either uhci_ucd (to scan for), or
> dm-mirror/dm-snapshot (when usb is disabled), freezes at that point.
>
> In the Dom0 I can see one CPU core of the DomU fully pegged, but other than
> that, the system becomes completely unresponsive.
>
> If there''s interest in the config, I can post that.
>
> For now, I''ve stuck with 2.6.38.
>
> --
> --- Heiko.
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>


-- 
Todd Deshane
http://www.linkedin.com/in/deshantm
http://www.xen.org/products/cloudxen.html
http://runningxen.com/

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