Messages in this thread | | | Date | Tue, 19 Sep 2023 16:21:29 +0100 | Subject | Re: Arches that don't support PREEMPT | From | Anton Ivanov <> |
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On 19/09/2023 16:17, Thomas Gleixner wrote: > On Tue, Sep 19 2023 at 15:21, Anton Ivanov wrote: >> On 19/09/2023 14:42, Peter Zijlstra wrote: >>> If you're working on one of them, then surely it's a simple matter of >>> working on adding CONFIG_PREEMPT support :-) >> In the case of UML adding preempt will be quite difficult. I looked at >> this a few years back. > What's so difficult about it?
It's been a while. I remember that I dropped it at the time, but do not remember the full details.
There was some stuff related to FP state and a few other issues I ran into while rewriting the interrupt controller. Some of it may be resolved by now as we are using host cpu flags, etc.
I can give it another go :)
> > Thanks, > > tglx > -- Anton R. Ivanov Cambridgegreys Limited. Registered in England. Company Number 10273661 https://www.cambridgegreys.com/
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