On 6/22/23 06:14, ypodemsk@xxxxxxxxxx wrote: > I will send a new version with the local variable as you suggested > soon. > As for the config name, what about CONFIG_ARCH_HAS_MM_CPUMASK? The confusing part about that name is that mm_cpumask() and mm->cpu_bitmap[] are defined unconditionally. So, they're *around* unconditionally but just aren't updated. BTW, it would also be nice to have _some_ kind of data behind this patch. Fewer IPIs are better I guess, but it would still be nice if you could say: Before this patch, /proc/interrupts showed 123 IPIs/hour for an isolated CPU. After the approach here, it was 0. ... or something.
