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



>>> On 07.12.16 at 17:10, <sven.koehler@xxxxxxxxx> wrote:
> Am 28.09.2016 um 05:50 schrieb Juergen Gross:
>> On 28/09/16 01:33, Sven Köhler wrote:
>>> Am 27.09.2016 um 14:52 schrieb Juergen Gross:
>>>> On 27/09/16 14:09, Sven Köhler wrote:
>>>>> 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?
>>>>
>>>> Sure. The attached patch is for Xen upstream, but I think it should
>>>> apply to Xen 4.7, too.
>>>
>>> This patch solved the issue for me. My domU boots fine again after
>>> recompiling pvgrub with the patch applied.
>>>
>>> Thanks!
>> 
>> Thank you for the test!
> 
> It seems this patch was not included in 4.7.1. That's a shame, cause I
> ran into the same issue after upgrading to 4.7.1.

I don't think anyone requested its inclusion - that process is in no
way automatic.

Jan

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