The unbound kthreads affinity management performed by cpuset is going to
be imported to the kthread core code for consolidation purposes.

Treat kthreadd just like any other kthread.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
---
 kernel/kthread.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/kthread.c b/kernel/kthread.c
index 51c0908d3d02..85ccf5bb17c9 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -818,12 +818,13 @@ int kthreadd(void *unused)
 	/* Setup a clean context for our children to inherit. */
 	set_task_comm(tsk, comm);
 	ignore_signals(tsk);
-	set_cpus_allowed_ptr(tsk, housekeeping_cpumask(HK_TYPE_KTHREAD));
 	set_mems_allowed(node_states[N_MEMORY]);
 
 	current->flags |= PF_NOFREEZE;
 	cgroup_init_kthreadd();
 
+	kthread_affine_node();
+
 	for (;;) {
 		set_current_state(TASK_INTERRUPTIBLE);
 		if (list_empty(&kthread_create_list))
-- 
2.51.1

On 12/24/25 8:45 AM, Frederic Weisbecker wrote:
> The unbound kthreads affinity management performed by cpuset is going to
> be imported to the kthread core code for consolidation purposes.
>
> Treat kthreadd just like any other kthread.
>
> Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
> ---
>   kernel/kthread.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/kernel/kthread.c b/kernel/kthread.c
> index 51c0908d3d02..85ccf5bb17c9 100644
> --- a/kernel/kthread.c
> +++ b/kernel/kthread.c
> @@ -818,12 +818,13 @@ int kthreadd(void *unused)
>   	/* Setup a clean context for our children to inherit. */
>   	set_task_comm(tsk, comm);
>   	ignore_signals(tsk);
> -	set_cpus_allowed_ptr(tsk, housekeeping_cpumask(HK_TYPE_KTHREAD));
>   	set_mems_allowed(node_states[N_MEMORY]);
>   
>   	current->flags |= PF_NOFREEZE;
>   	cgroup_init_kthreadd();
>   
> +	kthread_affine_node();
> +
>   	for (;;) {
>   		set_current_state(TASK_INTERRUPTIBLE);
>   		if (list_empty(&kthread_create_list))
Reviewed-by: Waiman Long <longman@redhat.com>