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mm,memory-tiers: use node-notifier instead of memory-notifier

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memory-tier is only concerned when a numa node changes its memory state,
because it then needs to re-create the demotion list.  So stop using the
memory notifier and use the new numa node notifer instead.

Link: https://lkml.kernel.org/r/20250616135158.450136-6-osalvador@suse.de
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>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Oscar Salvador 2025-06-16 15:51:48 +02:00 committed by Andrew Morton
parent 5a20c096a1
commit 265ab08697
1 changed files with 6 additions and 13 deletions
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19
mm/memory-tiers.c
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@ -872,25 +872,18 @@ static int __meminit memtier_hotplug_callback(struct notifier_block *self,
unsigned long action, void *_arg) unsigned long action, void *_arg)
{ {
struct memory_tier *memtier; struct memory_tier *memtier;
struct memory_notify *arg = _arg; struct node_notify *nn = _arg;
/*
* Only update the node migration order when a node is
* changing status, like online->offline.
*/
if (arg->status_change_nid < 0)
return notifier_from_errno(0);
switch (action) { switch (action) {
case MEM_OFFLINE: case NODE_REMOVED_LAST_MEMORY:
mutex_lock(&memory_tier_lock); mutex_lock(&memory_tier_lock);
if (clear_node_memory_tier(arg->status_change_nid)) if (clear_node_memory_tier(nn->nid))
establish_demotion_targets(); establish_demotion_targets();
mutex_unlock(&memory_tier_lock); mutex_unlock(&memory_tier_lock);
break; break;
case MEM_ONLINE: case NODE_ADDED_FIRST_MEMORY:
mutex_lock(&memory_tier_lock); mutex_lock(&memory_tier_lock);
memtier = set_node_memory_tier(arg->status_change_nid); memtier = set_node_memory_tier(nn->nid);
if (!IS_ERR(memtier)) if (!IS_ERR(memtier))
establish_demotion_targets(); establish_demotion_targets();
mutex_unlock(&memory_tier_lock); mutex_unlock(&memory_tier_lock);
@ -929,7 +922,7 @@ static int __init memory_tier_init(void)
nodes_and(default_dram_nodes, node_states[N_MEMORY], nodes_and(default_dram_nodes, node_states[N_MEMORY],
node_states[N_CPU]); node_states[N_CPU]);
hotplug_memory_notifier(memtier_hotplug_callback, MEMTIER_HOTPLUG_PRI); hotplug_node_notifier(memtier_hotplug_callback, MEMTIER_HOTPLUG_PRI);
return 0; return 0;
} }
subsys_initcall(memory_tier_init); subsys_initcall(memory_tier_init);