Re: [PATCH][GIT PULL][v3.3] x86: Test saved %rip in NMI to determine nested NMI

[H. Peter Anvin]

Not even all that legacy.

Ingo Molnar <mingo@xxxxxxx> wrote:

>
>* Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
>
>> On Mon, 2012-02-20 at 09:10 +0100, Ingo Molnar wrote:
>> > > 
>> > > Note, it does not seem to cause any destruction, but screw up 
>> > > profiling.
>> > 
>> > Except if the source of the NMI was not profiling, right?
>> 
>> Well, what else are NMIs used for? [...]
>
>There's various (legacy) diagnostics NMIs on various x86 
>platforms, mostly signalling some sort of deep trouble
>with the hw.
>
>Thanks,
>
>	Ingo

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