Re: [PATCH 2/4] x86: Prepare vm86 tasks to handle User-Mode Instruction Prevention

[Ricardo Neri]

On Tue, 2016-11-08 at 18:00 +0100, Peter Zijlstra wrote:
> > > +       }
> > > +#endif
> > > +
> > 
> > NAK.  If this code is going to exist, it needs to be deeply buried
> in
> > some unlikely if statement that already exists.  There's no good
> > reason to penalize all context switches to support some nonsensical
> > vm86 use case.
> 
> Agreed, now if instead vm86 get to emulate these instructions, this
> all
> magically goes away..

Yes. I agree. I will rework the series and this should not be needed.

Thanks and BR,
Ricardo