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

[Avi Kivity]

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.

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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