From: Oscar Salvador Date: Mon, 16 Jun 2025 13:51:52 +0000 (+0200) Subject: mm,mempolicy: use node-notifier instead of memory-notifier X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cf0b61adf23f2cfaa360cd7d81d224c0bde7f413;p=thirdparty%2Flinux.git mm,mempolicy: use node-notifier instead of memory-notifier mempolicy is only concerned when a numa node changes its memory state, because it needs to take this node into account for the auto-weighted memory policy system. So stop using the memory notifier and use the new numa node notifer instead. Link: https://lkml.kernel.org/r/20250616135158.450136-10-osalvador@suse.de Signed-off-by: Oscar Salvador Reviewed-by: Jonathan Cameron Reviewed-by: Harry Yoo Reviewed-by: Vlastimil Babka Reviewed-by: Rakie Kim Acked-by: David Hildenbrand Reviewed-by: Gregory Price Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Signed-off-by: Andrew Morton --- diff --git a/mm/mempolicy.c b/mm/mempolicy.c index b0619d0020c93..1ff7b2174eb77 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -3788,20 +3788,17 @@ static int wi_node_notifier(struct notifier_block *nb, unsigned long action, void *data) { int err; - struct memory_notify *arg = data; - int nid = arg->status_change_nid; - - if (nid < 0) - return NOTIFY_OK; + struct node_notify *nn = data; + int nid = nn->nid; switch (action) { - case MEM_ONLINE: + case NODE_ADDED_FIRST_MEMORY: err = sysfs_wi_node_add(nid); if (err) pr_err("failed to add sysfs for node%d during hotplug: %d\n", nid, err); break; - case MEM_OFFLINE: + case NODE_REMOVED_LAST_MEMORY: sysfs_wi_node_delete(nid); break; } @@ -3840,7 +3837,7 @@ static int __init add_weighted_interleave_group(struct kobject *mempolicy_kobj) } } - hotplug_memory_notifier(wi_node_notifier, DEFAULT_CALLBACK_PRI); + hotplug_node_notifier(wi_node_notifier, DEFAULT_CALLBACK_PRI); return 0; err_cleanup_kobj: