Re: [PATCH 16/27] sched/isolation: Flush memcg workqueues on cpuset isolated partition change

[Shakeel Butt]

On Fri, Jun 20, 2025 at 05:22:57PM +0200, Frederic Weisbecker wrote:
> The HK_TYPE_DOMAIN housekeeping cpumask is now modifyable at runtime. In
> order to synchronize against memcg workqueue to make sure that no
> asynchronous draining is still pending or executing on a newly made
> isolated CPU, the housekeeping susbsystem must flush the memcg
> workqueues.
> 
> However the memcg workqueues can't be flushed easily since they are
> queued to the main per-CPU workqueue pool.
> 
> Solve this with creating a memcg specific pool and provide and use the
> appropriate flushing API.
> 
> Signed-off-by: Frederic Weisbecker <frederic@xxxxxxxxxx>

Acked-by: Shakeel Butt <shakeel.butt@xxxxxxxxx>