On Sun, Jan 05, 2014 at 05:45:47AM +0100, Mike Galbraith wrote:

On Sat, 2014-01-04 at 19:18 +0100, Andi Kleen wrote: 

quoted

On Fri, Jan 03, 2014 at 02:55:48PM +0100, Sebastian Andrzej Siewior wrote:

quoted

where do I start. Let me explain what is going on here. The code
sequence

Yes the IST stacks are needed for correctness, even in more cases than
the example below. You cannot just disable them, just because you don't
like them.

You had a better reason than dislike.

Ah true it was me. Good point. I forgot all about that.

Probably it needs some form of the NMI style paranoid_* switch.

-Andi