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Re: [Xen-devel] 4.2.3 - xen: vector 0x2 is not implemented

On 9/10/2013 2:56 AM, Boris Ostrovsky wrote:
> On 10/08/2013 10:41 AM, Steven Haigh wrote:
>> On 10/09/2013 01:31 AM, Boris Ostrovsky wrote:
>>> On 10/08/2013 08:42 AM, Ian Campbell wrote:
>>>> On Tue, 2013-10-08 at 10:50 +1100, Steven Haigh wrote:
>>>>> Hi all,
>>>>> I've had a report of a host starting to give this output:
>>>>> Oct 7 19:36:37 kernel: INFO: rcu_sched self-detected stall on CPU { 2}
>>>>> (t=273561 jiffies g=17919 c=17918 q=9688)
>>>>> Oct 7 19:36:37 kernel: sending NMI to all CPUs:
>>>>> Oct 7 19:36:37 kernel: xen: vector 0x2 is not implemented
>>>> This bit is just a symptom triggered by the initial rcu stall which is
>>>> your real problem.
>>>> That said I thought the NMI thing was fixed recently, which might have
>>>> gotten you better debugging on the rcu problem.
>>> This went into v3.12-rc1 (commit 6efa20e).
>>> Steven, can you try your test with newer kernels that have this fix?
>>> With
>>> it we should be able to see where the stall is happening.
>> Sadly I can't easily rebuild this to 3.12. Is it possible to get a
>> version / patch / commit that will work with 3.11.x?
> I am not sure I understand what you are asking for. A backport of the
> patch to 3.11.x so that you apply it on top of your sources and build it
> yourself?

Correct. I have a buildroot set up for building 3.11.x into RPMs that
would take a lot of work to change to 3.12. As this is a problem with
3.11 as well (as I don't run or provide 3.12 anywhere), I'd like to test
the fix on 3.11.

Eventually, it will need to be fixed in the 3.11 series as well.

Steven Haigh

Email: netwiz@xxxxxxxxx
Web: https://www.crc.id.au
Phone: (03) 9001 6090 - 0412 935 897
Fax: (03) 8338 0299

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