Re: [patch 1/2] x86_64 page fault NMI-safe

[H. Peter Anvin]

On 07/15/2010 10:38 AM, Mathieu Desnoyers wrote:
>>
>> Of course, if there is some trap that re-enables interrupts even if
>> the trap happened in an interrupt-disabled region, then that would
>> change things, but that would be a bad bug regardless (and totally
>> independently of any NMI issues). So in that sense it's a "could
>> happen", but it's something that would be a totally separate bug.
> 
> Yep, this kind of scenario would therefore be a bug that does not belong to the
> specific realm of nmis.
> 

Yes, the only specific issue here is NMI -> trap -> IRET -> [nested
NMI], which is what this whole thing is about.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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