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    SubjectRe: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking
    On Wed, Sep 14, 2011 at 10:00:07AM +0300, Avi Kivity wrote:
    > On 09/13/2011 10:21 PM, Don Zickus wrote:
    > >Or are you saying an NMI in an idle system will have the same %rip thus
    > >falsely detecting a back-to-back NMI?
    > >
    > >
    > That's easy to avoid - insert an instruction zeroing the last
    > nmi_rip somewhere before or after hlt. It's always okay to execute
    > such an instruction (outside the nmi handler itself), since nmi_rip
    > is meant to detect a "no instructions executed" condition.

    Ah. Like a touch_nmi_watchdog() type of thing. Interesting. I'll poke
    around the idle code. Need to instrument a reproducer first.


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