Re: [Xen-users] pvgrub: Error 9: Unknown boot failure

[Juergen Gross <jgross@xxxxxxxx>]

Continuing the thread on xen-devel.

On 27/09/16 00:48, Sven Köhler wrote:
> Am 26.09.2016 um 07:43 schrieb Juergen Gross:
>> On 25/09/16 18:04, Sven Köhler wrote:
>>> Hi,
>>>
>>> I'm experiencing the bug below which was discussed on xen-devel December
>>> last year buy Ian and Juergen. I'm using xen-pvgrub-4.7.0 on Gentoo.
>>>
>>> The bug only seems to occur with the last domU booted on my machine.
>>> Where do I find a patch that fixes that?
>>
>> The issue back in December was fixed by commit
>> c8eb0ec277ae387e78d685523e0fee633e46f046 which is included in Xen 4.7.
>> Either gentoo didn't update to the official Xen 4.7 release (including
>> pvgrub) or you are seeing a new issue.
> 
> From the looks of it, the Gentoo package is using the grub from the
> xen-4.7.0 tarball.
> 
> I downgraded to pvgrub 4.6.3 and the problem went away.
> 
> So I assume I'm seeing a new issue. How do I debug it?

Interesting. Just tested it on upstream Xen and saw the same problem
with a rather old guest kernel (3.0 based, xen flavor), while a newer
kernel (4.1, pvops) is working.

Can you give me some more details about the kernel you are trying to
boot?

I'll investigate further.

In case you feel adventurous and want to do some debugging yourself:
You need to build Xen from the sources. Your scenario includes debugging
of Xen tools (probably the domain builder in tools/libxc), Mini-OS
(extras/mini-os-remote) and grub (stubdom/grub-upstream). All paths
mentioned are in the xen tree, some might be created only during first
build.


Juergen

>>> Once I find a patch to address the issue, I will also forward it to the
>>> Gentoo maintainers via their bugzilla.
>>>
>>>
>>> Kind Regards,
>>>   Sven
>>>
>>>
>>> output of xl create -c:
>>>
>>>   Booting 'Gentoo'
>>>
>>> root (hd0)
>>>  Filesystem type is ext2fs, using whole disk
>>> kernel /boot/vmlinuz ro root=/dev/xvda1 rootfstype=ext4
>>>
>>> ============= Init TPM Front ================
>>> Tpmfront:Error Unable to read device/vtpm/0/backend-id during tpmfront
>>> initialization! error = ENOENT
>>> Tpmfront:Info Shutting down tpmfront
>>> pin_table(x) returned 28993
>>>
>>> Error 9: Unknown boot failure
>>>
>>> Press any key to continue...
>>>
>>>
>>>
>>> _______________________________________________
>>> Xen-users mailing list
>>> Xen-users@xxxxxxxxxxxxx
>>> https://lists.xen.org/xen-users
>>>
>>
> 


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