Re: RCU question

[Zwane Mwaikambo]

On Sun, 12 Dec 2004, Manfred Spraul wrote:

> Zwane Mwaikambo wrote:
> 
> > "Intel processors don't suppress SMI or NMI after an STI instruction. Since
> > the INTR suppresion is not preserved across an SMI or NMI handler, this may
> > result in an INTR being serviced after the STI, which constitutes a
> > violation of the INTR suppresion.
> >  
> Interesting find.
> It means that our NMI irq return path should check if it points to a hlt
> instruction and if yes, then increase the saved EIP by one before doing the
> iretd, right?

Yeah that should do it, but then we also have to worry about SMIs, perhaps 
we could add similar logic to interrupt return path instead?
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