Re: [PATCH wq/for-7.4 v2 3/3] workqueue: add a percpu_concurrency_managed workqueue attribute

From: Tejun Heo

Date: Mon Sep 28 2026 - 17:31:18 EST


Hello, Breno.

On Fri, Sep 25, 2026 at 06:09:52AM -0700, Breno Leitao wrote:
> Introduce percpu_concurrency_managed, similar to the discussion in [1],
> and use it when deciding to do concurrency management, instead of
> relying on WQ_PERCPU (the only WQ type that does CM as of now).

Once PERCPU is its own scope, the scope picks the backend, and concurrency
management and the per-cpu max_active follow from that. Opting out of
concurrency management on the per-cpu pools is what WQ_CPU_INTENSIVE already
does, and I don't see a need to change that at runtime. How about dropping
this patch for now?

Thanks.

--
tejun