Re: [RFC PATCH v2] Introduce Hierarchical Per-CPU Counters

[Christoph Lameter (Ampere)]

On Tue, 8 Apr 2025, Mathieu Desnoyers wrote:

> Currently percpu_counter_tree_precise_sum_unbiased() iterates on each
> possible cpu, which does not require cpu hotplug integration.

Well that looks like a performance issue if you have a system that can
expand to 8K cpus but currently only has 16 or so online.