Re: [patch] i386: remove IOPL check on task switch

[Andi Kleen]

> Nack.  This is used for paravirt-ops kernels that use IOPL'd userspace.  
> Fixing it would require a fairly heavy penalty on the iret path, since 
> every single instruction there contributes to a critical region which 
> must have custom fixup code, or some other technique to provide 
> protection against interrupt re-entrancy.
> 
> At least, let's discuss other potential solutions first - for now it is 
> harmless.

Ok I will drop the patch again

-Andi
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