Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking

[Andi Kleen]

> So I got around to implementing this and it seems to work great.  The back
> to back NMIs are detected properly using the %rip and that info is passed to
> the NMI notifier.  That info is used to determine if only the first
> handler to report 'handled' is executed or _all_ the handlers are
> executed.
> 
> I think all the 'unknown' NMIs I generated with various perf runs have
> disappeared.  I'll post a new version of my nmi notifier rewrite soon.

This will fail when the system is idle.

-Andi

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