Re: [PATCH 05/27] memcg: Prepare to protect against concurrent isolated cpuset change

[Shakeel Butt]

On Fri, Jun 20, 2025 at 05:22:46PM +0200, Frederic Weisbecker wrote:
> The HK_TYPE_DOMAIN housekeeping cpumask will soon be made modifyable at
> runtime. In order to synchronize against memcg workqueue to make sure
> that no asynchronous draining is pending or executing on a newly made
> isolated CPU, read-lock the housekeeping rwsem lock while targeting
> and queueing a drain work.
> 
> Whenever housekeeping will update the HK_TYPE_DOMAIN cpumask, a memcg
> workqueue flush will also be issued in a further change to make sure
> that no work remains pending after a CPU had been made isolated.
> 
> Signed-off-by: Frederic Weisbecker <frederic@xxxxxxxxxx>

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