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

[Sven Köhler <sven.koehler@xxxxxxxxx>]

Am 27.09.2016 um 14:02 schrieb Juergen Gross:
> 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?

Yes, I'm fine with adding me as the reporter.
Do you want me to test the patch first?

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