Messages in this thread | | | Date | Sun, 5 Jan 2014 19:04:47 +0100 | From | Andi Kleen <> | Subject | Re: [PATCH] Revert "x86: Disable IST stacks for debug/int 3/stack fault for PREEMPT_RT" |
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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: > > On Fri, Jan 03, 2014 at 02:55:48PM +0100, Sebastian Andrzej Siewior wrote: > > > 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
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