Re: [PATCH] mm/mmu_gather: send tlb_remove_table_smp_sync IPI only to MM CPUs

[Peter Zijlstra]

On Sun, Mar 12, 2023 at 10:09:45AM +0200, Yair Podemsky wrote:
> Currently the tlb_remove_table_smp_sync IPI is sent to all CPUs
> indiscriminately, this causes unnecessary work and delays notable in
> real-time use-cases and isolated cpus, this patch will limit this IPI to
> only be sent to cpus referencing the effected mm and are currently in
> kernel space.

Did you validate that all architectures for which this is relevant
actually set bits in mm_cpumask() ?