[PATCH v6 08/10] kernel,cpuset: Use node-notifier instead of memory-notifier

Oscar Salvador
2025-06-09T09:22:19Z

cpuset is only concerned when a numa node changes its memory state,
as it needs to know the current numa nodes with memory to keep
an updated mems_allowed mask.
So stop using the memory notifier and use the new numa node notifer
instead.

Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: David Hildenbrand <david@redhat.com>
---
kernel/cgroup/cpuset.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 83639a12883d..66c84024f217 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -4013,7 +4013,7 @@ void __init cpuset_init_smp(void)
cpumask_copy(top_cpuset.effective_cpus, cpu_active_mask);
top_cpuset.effective_mems = node_states[N_MEMORY];

- hotplug_memory_notifier(cpuset_track_online_nodes, CPUSET_CALLBACK_PRI);
+ hotplug_node_notifier(cpuset_track_online_nodes, CPUSET_CALLBACK_PRI);

cpuset_migrate_mm_wq = alloc_ordered_workqueue("cpuset_migrate_mm", 0);
BUG_ON(!cpuset_migrate_mm_wq);
--
2.49.0