Re: [Xen-devel] Hypervisor error messages after xl block-detach with linux 3.18-rc5

[Juergen Gross <jgross@xxxxxxxx>]

On 11/24/2014 11:59 AM, Juergen Gross wrote:
> On 11/24/2014 11:20 AM, Jan Beulich wrote:
> > > > > On 24.11.14 at 10:55, <JGross@xxxxxxxx> wrote:
> > > - Sometimes I see only NMI watchdog messages, looking into hanging cpu
> > >     state via xen debug keys I can see the cpu(s) in question are
> > > spinning
> > >     in _raw_spin_lock():
> > >     __handle_mm_fault()->__pte_alloc()->pmd_lock()->_raw_spin_lock()
> > >     The hanging cpus were executing some random user processes (cron,
> > >     bash, xargs), cr2 contained user addresses.
> > Is this perhaps what
> > http://lists.xenproject.org/archives/html/xen-devel/2014-11/msg02135.html
> > appears to be about?
> Hmm, I'm not sure.
>
> I'll try a 3.17 kernel to verify.
Still seeing the issue, but less frequent. OTOH I just found in above
thread in lkml that 3.17 is showing that issue, too. :-(

I'll try to setup a pv-variant of Linus' patch and test it...


Juergen


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