Re: [Xen-devel] [PATCHv10 0/9] Xen: extend kexec hypercall for use with pv-ops kernels

[Daniel Kiper <daniel.kiper@xxxxxxxxxx>]

On Fri, Nov 08, 2013 at 01:13:59PM +0000, David Vrabel wrote:

[...]

> > (XEN) Domain 0 crashed: Executing crash image
> >
> > gdb shows:
> >
> > (gdb) bt
> > #0  0xffff82d0801a0092 in do_nmi_crash (regs=<optimized out>) at crash.c:113
> > #1  0xffff82d0802281d9 in nmi_crash () at entry.S:666
> > #2  0x0000000000000000 in ?? ()
> > (gdb)
> >
> > Especially second bt line scares me... ;-)))
> >
> > I have not been able to identify why NMI was activated because
> > stack is completely cleared.
>
> All this you have described here is correct and expected behavior,
> which, quite frankly, you should have been able to see with even the
> most cursory look at the code.

This is more a fun stuff than a real concern. That is why I have added
smile at the end of my statement. nmi_crash () at entry.S:666 is
a quite interesting coincidence for me... ;-)))

Anyway, it is interesting why all CPUs were stopped at this stage.
One should execute kdump code still. I will try to reproduce this
on real hardware.

Daniel

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