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/
