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

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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 <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>
Reviewed-by: Rakie Kim <rakie.kim@sk.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Gregory Price <gourry@gourry.net>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Oscar Salvador 2025-06-16 15:51:52 +02:00 committed by Andrew Morton
parent 8e1bf051c5
commit cf0b61adf2
1 changed files with 5 additions and 8 deletions
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13
mm/mempolicy.c
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@ -3788,20 +3788,17 @@ static int wi_node_notifier(struct notifier_block *nb,
unsigned long action, void *data) unsigned long action, void *data)
{ {
int err; int err;
struct memory_notify *arg = data; struct node_notify *nn = data;
int nid = arg->status_change_nid; int nid = nn->nid;
if (nid < 0)
return NOTIFY_OK;
switch (action) { switch (action) {
case MEM_ONLINE: case NODE_ADDED_FIRST_MEMORY:
err = sysfs_wi_node_add(nid); err = sysfs_wi_node_add(nid);
if (err) if (err)
pr_err("failed to add sysfs for node%d during hotplug: %d\n", pr_err("failed to add sysfs for node%d during hotplug: %d\n",
nid, err); nid, err);
break; break;
case MEM_OFFLINE: case NODE_REMOVED_LAST_MEMORY:
sysfs_wi_node_delete(nid); sysfs_wi_node_delete(nid);
break; 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; return 0;
err_cleanup_kobj: err_cleanup_kobj: