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

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On 09/07/2011 08:21 PM, Don Zickus wrote:
>
>  How about, during NMI, save %rip to a per-cpu variable.  Handle just
>  one cause.  If, on the next NMI, we hit the same %rip, assume
>  back-to-back NMI has occured and now handle all causes.

I had a similar idea a couple of months ago while debugging a continuous
flow of back-to-back NMIs from a stress-test perf application and I
couldn't get it to work.  But let me try it again, because it does make
sense as an optimization.



Great, thanks.

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

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