Re: [Xen-devel] [Patch v2] x86/crash: Indicate how well nmi_shootdown_cpus() managed to do.

[Keir Fraser <keir.xen@xxxxxxxxx>]

On 25/09/2013 11:22, "Andrew Cooper" <andrew.cooper3@xxxxxxxxxx> wrote:

> Having nmi_shootdown_cpus() report which pcpus failed to be shot down is a
> useful debugging hint as to what possibly went wrong (especially when the
> crash logs seem to indicate that an NMI timeout occurred while waiting for one
> of the problematic pcpus to perform an action).
> 
> This is achieved by swapping an atomic_t count of unreported pcpus with a
> cpumask.  In the case that the 1 second timeout occurs, use the cpumask to
> identify the problematic pcpus.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> CC: Keir Fraser <keir@xxxxxxx>
> CC: Jan Beulich <JBeulich@xxxxxxxx>
> CC: Tim Deegan <tim@xxxxxxx>

Acked-by: Keir Fraser <keir@xxxxxxx>



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