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

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

----- netwiz@xxxxxxxxx wrote:

> 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.

I am attaching the patch to 3.11.4 (which is exactly the same as the one
that went into 3.12 btw). I only compile-tested it to make sure that it builds.

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

It's unlikely to go into 3.11 since it's really a new feature and not a bug fix.


-boris

Attachment: nmi_3.11.4.patch
Description: Text document

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel