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

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


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