Messages in this thread | | | Date | Tue, 6 Sep 2022 07:35:36 -0700 | From | Yury Norov <> | Subject | Re: [PATCH v2 0/5] cpumask: cleanup nr_cpu_ids vs nr_cpumask_bits mess |
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On Tue, Sep 06, 2022 at 10:55:20AM +0200, Peter Zijlstra wrote: > On Mon, Sep 05, 2022 at 04:08:15PM -0700, Yury Norov wrote: > > cpumask subsystem uses nr_cpu_ids and nr_cpumask_bits interchangeably > > despite that the variables have different meaning and purpose. It makes > > some cpumask functions broken. > > > > This series cleans that mess and adds new config FORCE_NR_CPUS that > > allows to optimize cpumask subsystem if the number of CPUs is known > > at compile-time. > > Who will use this? Distro's can't,
Raspberry PI can. Smartphone vendors can, and probably should. Ditto for vehicles and all embedded applications.
> which means 99% of people will not > use this ever. Is it worth it?
I will definitely enable it for myself. Actually anyone who set NR_CPUS to a non-default value, may also be interested in FORCE_NR_CPUS.
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