Messages in this thread | | | Subject | Re: [RFC PATCH 00/16] x86/split_lock: Enable #AC exception for split locked accesses | From | Dave Hansen <> | Date | Thu, 21 Jun 2018 15:18:19 -0700 |
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On 06/21/2018 03:08 PM, Peter Zijlstra wrote: > On Thu, Jun 21, 2018 at 03:00:03PM -0700, Fenghua Yu wrote: >> The control knob for kernel is to choose re-executing the faulting >> instruction (default) or kernel panic. Kernel panic may be useful in hard >> real time which has less tolerant to bad performance. > The kernel should never trigger this, ever. Any #AC is a plain bug and > should be fixed. So unconditional WARN+disable is suffient.
It sounds like we need to start with that functionality and then if Fenghua wants to do more, we have add-on patches that can be evaluated by themselves.
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