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

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slub is only concerned when a numa node changes its memory state, so stop
using the memory notifier and use the new numa node notifer instead.

[akpm@linux-foundation.org: slub.c needs node.h for struct node_notify]
  Link: https://lore.kernel.org/oe-kbuild-all/202506202144.dGkFxasv-lkp@intel.com/
Link: https://lkml.kernel.org/r/20250616135158.450136-5-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 15:51:47 +02:00 committed by Andrew Morton
parent 67929de108
commit 5a20c096a1
1 changed files with 10 additions and 19 deletions
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29
mm/slub.c
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@ -23,6 +23,7 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/kasan.h>
#include <linux/node.h>
#include <linux/kmsan.h>
#include <linux/cpu.h>
#include <linux/cpuset.h>
@ -6149,7 +6150,7 @@ int __kmem_cache_shrink(struct kmem_cache *s)
return __kmem_cache_do_shrink(s);
}
static int slab_mem_going_offline_callback(void *arg)
static int slab_mem_going_offline_callback(void)
{
struct kmem_cache *s;
@ -6163,21 +6164,12 @@ static int slab_mem_going_offline_callback(void *arg)
return 0;
}
static int slab_mem_going_online_callback(void *arg)
static int slab_mem_going_online_callback(int nid)
{
struct kmem_cache_node *n;
struct kmem_cache *s;
struct memory_notify *marg = arg;
int nid = marg->status_change_nid;
int ret = 0;
/*
* If the node's memory is already available, then kmem_cache_node is
* already created. Nothing to do.
*/
if (nid < 0)
return 0;
/*
* We are bringing a node online. No memory is available yet. We must
* allocate a kmem_cache_node structure in order to bring the node
@ -6217,17 +6209,16 @@ static int slab_mem_going_online_callback(void *arg)
static int slab_memory_callback(struct notifier_block *self,
unsigned long action, void *arg)
{
struct node_notify *nn = arg;
int nid = nn->nid;
int ret = 0;
switch (action) {
case MEM_GOING_ONLINE:
ret = slab_mem_going_online_callback(arg);
case NODE_ADDING_FIRST_MEMORY:
ret = slab_mem_going_online_callback(nid);
break;
case MEM_GOING_OFFLINE:
ret = slab_mem_going_offline_callback(arg);
break;
case MEM_ONLINE:
case MEM_CANCEL_OFFLINE:
case NODE_REMOVING_LAST_MEMORY:
ret = slab_mem_going_offline_callback();
break;
}
if (ret)
@ -6303,7 +6294,7 @@ void __init kmem_cache_init(void)
sizeof(struct kmem_cache_node),
SLAB_HWCACHE_ALIGN | SLAB_NO_OBJ_EXT, 0, 0);
hotplug_memory_notifier(slab_memory_callback, SLAB_CALLBACK_PRI);
hotplug_node_notifier(slab_memory_callback, SLAB_CALLBACK_PRI);
/* Able to allocate the per node structures */
slab_state = PARTIAL;