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

[Avi Kivity]

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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