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

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Message-ID: <20250609092149.312114-9-osalvador@suse.de>
Date: Mon,  9 Jun 2025 11:21:45 +0200
From: Oscar Salvador <osalvador@...e.de>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: David Hildenbrand <david@...hat.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Harry Yoo <harry.yoo@...cle.com>,
	Rakie Kim <rakie.kim@...com>,
	Hyeonggon Yoo <42.hyeyoo@...il.com>,
	Joshua Hahn <joshua.hahnjy@...il.com>,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Oscar Salvador <osalvador@...e.de>
Subject: [PATCH v6 08/10] kernel,cpuset: Use node-notifier instead of memory-notifier

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@...e.de>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Reviewed-by: Harry Yoo <harry.yoo@...cle.com>
Reviewed-by: Vlastimil Babka <vbabka@...e.cz>
Acked-by: David Hildenbrand <david@...hat.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