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

[Juergen Gross <jgross@xxxxxxxx>]

On 27/09/16 13:13, Sven Köhler wrote:
> Am 27.09.2016 um 07:31 schrieb Juergen Gross:
>> 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?
> 
> It's an unmodified 4.4.21 kernel which I compile by hand. The config is
> attached. Does that help?

Not really. OTOH I think I don't need more help, as I've found a problem
in pvgrub. I have a patch which seems to correct the issue. Are you fine
with me adding you as the original reporter of the problem in the patch?


Juergen


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