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