Merge tag 'mm-stable-2025-07-30-15-25' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:
 "As usual, many cleanups. The below blurbiage describes 42 patchsets.
  21 of those are partially or fully cleanup work. "cleans up",
  "cleanup", "maintainability", "rationalizes", etc.

  I never knew the MM code was so dirty.

  "mm: ksm: prevent KSM from breaking merging of new VMAs" (Lorenzo Stoakes)
     addresses an issue with KSM's PR_SET_MEMORY_MERGE mode: newly
     mapped VMAs were not eligible for merging with existing adjacent
     VMAs.

  "mm/damon: introduce DAMON_STAT for simple and practical access monitoring" (SeongJae Park)
     adds a new kernel module which simplifies the setup and usage of
     DAMON in production environments.

  "stop passing a writeback_control to swap/shmem writeout" (Christoph Hellwig)
     is a cleanup to the writeback code which removes a couple of
     pointers from struct writeback_control.

  "drivers/base/node.c: optimization and cleanups" (Donet Tom)
     contains largely uncorrelated cleanups to the NUMA node setup and
     management code.

  "mm: userfaultfd: assorted fixes and cleanups" (Tal Zussman)
     does some maintenance work on the userfaultfd code.

  "Readahead tweaks for larger folios" (Ryan Roberts)
     implements some tuneups for pagecache readahead when it is reading
     into order>0 folios.

  "selftests/mm: Tweaks to the cow test" (Mark Brown)
     provides some cleanups and consistency improvements to the
     selftests code.

  "Optimize mremap() for large folios" (Dev Jain)
     does that. A 37% reduction in execution time was measured in a
     memset+mremap+munmap microbenchmark.

  "Remove zero_user()" (Matthew Wilcox)
     expunges zero_user() in favor of the more modern memzero_page().

  "mm/huge_memory: vmf_insert_folio_*() and vmf_insert_pfn_pud() fixes" (David Hildenbrand)
     addresses some warts which David noticed in the huge page code.
     These were not known to be causing any issues at this time.

  "mm/damon: use alloc_migrate_target() for DAMOS_MIGRATE_{HOT,COLD" (SeongJae Park)
     provides some cleanup and consolidation work in DAMON.

  "use vm_flags_t consistently" (Lorenzo Stoakes)
     uses vm_flags_t in places where we were inappropriately using other
     types.

  "mm/memfd: Reserve hugetlb folios before allocation" (Vivek Kasireddy)
     increases the reliability of large page allocation in the memfd
     code.

  "mm: Remove pXX_devmap page table bit and pfn_t type" (Alistair Popple)
     removes several now-unneeded PFN_* flags.

  "mm/damon: decouple sysfs from core" (SeongJae Park)
     implememnts some cleanup and maintainability work in the DAMON
     sysfs layer.

  "madvise cleanup" (Lorenzo Stoakes)
     does quite a lot of cleanup/maintenance work in the madvise() code.

  "madvise anon_name cleanups" (Vlastimil Babka)
     provides additional cleanups on top or Lorenzo's effort.

  "Implement numa node notifier" (Oscar Salvador)
     creates a standalone notifier for NUMA node memory state changes.
     Previously these were lumped under the more general memory
     on/offline notifier.

  "Make MIGRATE_ISOLATE a standalone bit" (Zi Yan)
     cleans up the pageblock isolation code and fixes a potential issue
     which doesn't seem to cause any problems in practice.

  "selftests/damon: add python and drgn based DAMON sysfs functionality tests" (SeongJae Park)
     adds additional drgn- and python-based DAMON selftests which are
     more comprehensive than the existing selftest suite.

  "Misc rework on hugetlb faulting path" (Oscar Salvador)
     fixes a rather obscure deadlock in the hugetlb fault code and
     follows that fix with a series of cleanups.

  "cma: factor out allocation logic from __cma_declare_contiguous_nid" (Mike Rapoport)
     rationalizes and cleans up the highmem-specific code in the CMA
     allocator.

  "mm/migration: rework movable_ops page migration (part 1)" (David Hildenbrand)
     provides cleanups and future-preparedness to the migration code.

  "mm/damon: add trace events for auto-tuned monitoring intervals and DAMOS quota" (SeongJae Park)
     adds some tracepoints to some DAMON auto-tuning code.

  "mm/damon: fix misc bugs in DAMON modules" (SeongJae Park)
     does that.

  "mm/damon: misc cleanups" (SeongJae Park)
     also does what it claims.

  "mm: folio_pte_batch() improvements" (David Hildenbrand)
     cleans up the large folio PTE batching code.

  "mm/damon/vaddr: Allow interleaving in migrate_{hot,cold} actions" (SeongJae Park)
     facilitates dynamic alteration of DAMON's inter-node allocation
     policy.

  "Remove unmap_and_put_page()" (Vishal Moola)
     provides a couple of page->folio conversions.

  "mm: per-node proactive reclaim" (Davidlohr Bueso)
     implements a per-node control of proactive reclaim - beyond the
     current memcg-based implementation.

  "mm/damon: remove damon_callback" (SeongJae Park)
     replaces the damon_callback interface with a more general and
     powerful damon_call()+damos_walk() interface.

  "mm/mremap: permit mremap() move of multiple VMAs" (Lorenzo Stoakes)
     implements a number of mremap cleanups (of course) in preparation
     for adding new mremap() functionality: newly permit the remapping
     of multiple VMAs when the user is specifying MREMAP_FIXED. It still
     excludes some specialized situations where this cannot be performed
     reliably.

  "drop hugetlb_free_pgd_range()" (Anthony Yznaga)
     switches some sparc hugetlb code over to the generic version and
     removes the thus-unneeded hugetlb_free_pgd_range().

  "mm/damon/sysfs: support periodic and automated stats update" (SeongJae Park)
     augments the present userspace-requested update of DAMON sysfs
     monitoring files. Automatic update is now provided, along with a
     tunable to control the update interval.

  "Some randome fixes and cleanups to swapfile" (Kemeng Shi)
     does what is claims.

  "mm: introduce snapshot_page" (Luiz Capitulino and David Hildenbrand)
     provides (and uses) a means by which debug-style functions can grab
     a copy of a pageframe and inspect it locklessly without tripping
     over the races inherent in operating on the live pageframe
     directly.

  "use per-vma locks for /proc/pid/maps reads" (Suren Baghdasaryan)
     addresses the large contention issues which can be triggered by
     reads from that procfs file. Latencies are reduced by more than
     half in some situations. The series also introduces several new
     selftests for the /proc/pid/maps interface.

  "__folio_split() clean up" (Zi Yan)
     cleans up __folio_split()!

  "Optimize mprotect() for large folios" (Dev Jain)
     provides some quite large (>3x) speedups to mprotect() when dealing
     with large folios.

  "selftests/mm: reuse FORCE_READ to replace "asm volatile("" : "+r" (XXX));" and some cleanup" (wang lian)
     does some cleanup work in the selftests code.

  "tools/testing: expand mremap testing" (Lorenzo Stoakes)
     extends the mremap() selftest in several ways, including adding
     more checking of Lorenzo's recently added "permit mremap() move of
     multiple VMAs" feature.

  "selftests/damon/sysfs.py: test all parameters" (SeongJae Park)
     extends the DAMON sysfs interface selftest so that it tests all
     possible user-requested parameters. Rather than the present minimal
     subset"

* tag 'mm-stable-2025-07-30-15-25' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (370 commits)
  MAINTAINERS: add missing headers to mempory policy & migration section
  MAINTAINERS: add missing file to cgroup section
  MAINTAINERS: add MM MISC section, add missing files to MISC and CORE
  MAINTAINERS: add missing zsmalloc file
  MAINTAINERS: add missing files to page alloc section
  MAINTAINERS: add missing shrinker files
  MAINTAINERS: move memremap.[ch] to hotplug section
  MAINTAINERS: add missing mm_slot.h file THP section
  MAINTAINERS: add missing interval_tree.c to memory mapping section
  MAINTAINERS: add missing percpu-internal.h file to per-cpu section
  mm/page_alloc: remove trace_mm_alloc_contig_migrate_range_info()
  selftests/damon: introduce _common.sh to host shared function
  selftests/damon/sysfs.py: test runtime reduction of DAMON parameters
  selftests/damon/sysfs.py: test non-default parameters runtime commit
  selftests/damon/sysfs.py: generalize DAMON context commit assertion
  selftests/damon/sysfs.py: generalize monitoring attributes commit assertion
  selftests/damon/sysfs.py: generalize DAMOS schemes commit assertion
  selftests/damon/sysfs.py: test DAMOS filters commitment
  selftests/damon/sysfs.py: generalize DAMOS scheme commit assertion
  selftests/damon/sysfs.py: test DAMOS destinations commitment
  ...

1 files changed, 84 insertions, 113 deletions

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index b1caedbade5b..1f15af712bc3 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -35,6 +35,7 @@
 #include <linux/compaction.h>
 #include <linux/rmap.h>
 #include <linux/module.h>
+#include <linux/node.h>
 
 #include <asm/tlbflush.h>
 
@@ -699,30 +700,6 @@ static void online_pages_range(unsigned long start_pfn, unsigned long nr_pages)
 	online_mem_sections(start_pfn, end_pfn);
 }
 
-/* check which state of node_states will be changed when online memory */
-static void node_states_check_changes_online(unsigned long nr_pages,
-	struct zone *zone, struct memory_notify *arg)
-{
-	int nid = zone_to_nid(zone);
-
-	arg->status_change_nid = NUMA_NO_NODE;
-	arg->status_change_nid_normal = NUMA_NO_NODE;
-
-	if (!node_state(nid, N_MEMORY))
-		arg->status_change_nid = nid;
-	if (zone_idx(zone) <= ZONE_NORMAL && !node_state(nid, N_NORMAL_MEMORY))
-		arg->status_change_nid_normal = nid;
-}
-
-static void node_states_set_node(int node, struct memory_notify *arg)
-{
-	if (arg->status_change_nid_normal >= 0)
-		node_set_state(node, N_NORMAL_MEMORY);
-
-	if (arg->status_change_nid >= 0)
-		node_set_state(node, N_MEMORY);
-}
-
 static void __meminit resize_zone_range(struct zone *zone, unsigned long start_pfn,
 		unsigned long nr_pages)
 {
@@ -770,7 +747,8 @@ static inline void section_taint_zone_device(unsigned long pfn)
  */
 void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
 				  unsigned long nr_pages,
-				  struct vmem_altmap *altmap, int migratetype)
+				  struct vmem_altmap *altmap, int migratetype,
+				  bool isolate_pageblock)
 {
 	struct pglist_data *pgdat = zone->zone_pgdat;
 	int nid = pgdat->node_id;
@@ -797,12 +775,13 @@ void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
 
 	/*
 	 * TODO now we have a visible range of pages which are not associated
-	 * with their zone properly. Not nice but set_pfnblock_flags_mask
+	 * with their zone properly. Not nice but set_pfnblock_migratetype()
 	 * expects the zone spans the pfn range. All the pages in the range
 	 * are reserved so nobody should be touching them so we should be safe
 	 */
 	memmap_init_range(nr_pages, nid, zone_idx(zone), start_pfn, 0,
-			 MEMINIT_HOTPLUG, altmap, migratetype);
+			 MEMINIT_HOTPLUG, altmap, migratetype,
+			 isolate_pageblock);
 
 	set_zone_contiguous(zone);
 }
@@ -1127,7 +1106,8 @@ int mhp_init_memmap_on_memory(unsigned long pfn, unsigned long nr_pages,
 	if (mhp_off_inaccessible)
 		page_init_poison(pfn_to_page(pfn), sizeof(struct page) * nr_pages);
 
-	move_pfn_range_to_zone(zone, pfn, nr_pages, NULL, MIGRATE_UNMOVABLE);
+	move_pfn_range_to_zone(zone, pfn, nr_pages, NULL, MIGRATE_UNMOVABLE,
+			       false);
 
 	for (i = 0; i < nr_pages; i++) {
 		struct page *page = pfn_to_page(pfn + i);
@@ -1173,11 +1153,17 @@ void mhp_deinit_memmap_on_memory(unsigned long pfn, unsigned long nr_pages)
 int online_pages(unsigned long pfn, unsigned long nr_pages,
 		       struct zone *zone, struct memory_group *group)
 {
-	unsigned long flags;
-	int need_zonelists_rebuild = 0;
+	struct memory_notify mem_arg = {
+		.start_pfn = pfn,
+		.nr_pages = nr_pages,
+	};
+	struct node_notify node_arg = {
+		.nid = NUMA_NO_NODE,
+	};
 	const int nid = zone_to_nid(zone);
+	int need_zonelists_rebuild = 0;
+	unsigned long flags;
 	int ret;
-	struct memory_notify arg;
 
 	/*
 	 * {on,off}lining is constrained to full memory sections (or more
@@ -1192,13 +1178,19 @@ int online_pages(unsigned long pfn, unsigned long nr_pages,
 
 
 	/* associate pfn range with the zone */
-	move_pfn_range_to_zone(zone, pfn, nr_pages, NULL, MIGRATE_ISOLATE);
-
-	arg.start_pfn = pfn;
-	arg.nr_pages = nr_pages;
-	node_states_check_changes_online(nr_pages, zone, &arg);
+	move_pfn_range_to_zone(zone, pfn, nr_pages, NULL, MIGRATE_MOVABLE,
+			       true);
+
+	if (!node_state(nid, N_MEMORY)) {
+		/* Adding memory to the node for the first time */
+		node_arg.nid = nid;
+		ret = node_notify(NODE_ADDING_FIRST_MEMORY, &node_arg);
+		ret = notifier_to_errno(ret);
+		if (ret)
+			goto failed_addition;
+	}
 
-	ret = memory_notify(MEM_GOING_ONLINE, &arg);
+	ret = memory_notify(MEM_GOING_ONLINE, &mem_arg);
 	ret = notifier_to_errno(ret);
 	if (ret)
 		goto failed_addition;
@@ -1224,12 +1216,13 @@ int online_pages(unsigned long pfn, unsigned long nr_pages,
 	online_pages_range(pfn, nr_pages);
 	adjust_present_page_count(pfn_to_page(pfn), group, nr_pages);
 
-	node_states_set_node(nid, &arg);
+	if (node_arg.nid >= 0)
+		node_set_state(nid, N_MEMORY);
 	if (need_zonelists_rebuild)
 		build_all_zonelists(NULL);
 
 	/* Basic onlining is complete, allow allocation of onlined pages. */
-	undo_isolate_page_range(pfn, pfn + nr_pages, MIGRATE_MOVABLE);
+	undo_isolate_page_range(pfn, pfn + nr_pages);
 
 	/*
 	 * Freshly onlined pages aren't shuffled (e.g., all pages are placed to
@@ -1245,16 +1238,22 @@ int online_pages(unsigned long pfn, unsigned long nr_pages,
 	kswapd_run(nid);
 	kcompactd_run(nid);
 
+	if (node_arg.nid >= 0)
+		/* First memory added successfully. Notify consumers. */
+		node_notify(NODE_ADDED_FIRST_MEMORY, &node_arg);
+
 	writeback_set_ratelimit();
 
-	memory_notify(MEM_ONLINE, &arg);
+	memory_notify(MEM_ONLINE, &mem_arg);
 	return 0;
 
 failed_addition:
 	pr_debug("online_pages [mem %#010llx-%#010llx] failed\n",
 		 (unsigned long long) pfn << PAGE_SHIFT,
 		 (((unsigned long long) pfn + nr_pages) << PAGE_SHIFT) - 1);
-	memory_notify(MEM_CANCEL_ONLINE, &arg);
+	memory_notify(MEM_CANCEL_ONLINE, &mem_arg);
+	if (node_arg.nid != NUMA_NO_NODE)
+		node_notify(NODE_CANCEL_ADDING_FIRST_MEMORY, &node_arg);
 	remove_pfn_range_from_zone(zone, pfn, nr_pages);
 	return ret;
 }
@@ -1571,13 +1570,12 @@ int add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
 		 * We online node here. We can't roll back from here.
 		 */
 		node_set_online(nid);
-		ret = __register_one_node(nid);
+		ret = register_one_node(nid);
 		BUG_ON(ret);
 	}
 
-	register_memory_blocks_under_node(nid, PFN_DOWN(start),
-					  PFN_UP(start + size - 1),
-					  MEMINIT_HOTPLUG);
+	register_memory_blocks_under_node_hotplug(nid, PFN_DOWN(start),
+					  PFN_UP(start + size - 1));
 
 	/* create new memmap entry */
 	if (!strcmp(res->name, "System RAM"))
@@ -1741,8 +1739,8 @@ bool mhp_range_allowed(u64 start, u64 size, bool need_mapping)
 
 #ifdef CONFIG_MEMORY_HOTREMOVE
 /*
- * Scan pfn range [start,end) to find movable/migratable pages (LRU pages,
- * non-lru movable pages and hugepages). Will skip over most unmovable
+ * Scan pfn range [start,end) to find movable/migratable pages (LRU and
+ * hugetlb folio, movable_ops pages). Will skip over most unmovable
  * pages (esp., pages that can be skipped when offlining), but bail out on
  * definitely unmovable pages.
  *
@@ -1761,13 +1759,11 @@ static int scan_movable_pages(unsigned long start, unsigned long end,
 		struct folio *folio;
 
 		page = pfn_to_page(pfn);
-		if (PageLRU(page))
-			goto found;
-		if (__PageMovable(page))
+		if (PageLRU(page) || page_has_movable_ops(page))
 			goto found;
 
 		/*
-		 * PageOffline() pages that are not marked __PageMovable() and
+		 * PageOffline() pages that do not have movable_ops and
 		 * have a reference count > 0 (after MEM_GOING_OFFLINE) are
 		 * definitely unmovable. If their reference count would be 0,
 		 * they could at least be skipped when offlining memory.
@@ -1886,54 +1882,6 @@ static int __init cmdline_parse_movable_node(char *p)
 }
 early_param("movable_node", cmdline_parse_movable_node);
 
-/* check which state of node_states will be changed when offline memory */
-static void node_states_check_changes_offline(unsigned long nr_pages,
-		struct zone *zone, struct memory_notify *arg)
-{
-	struct pglist_data *pgdat = zone->zone_pgdat;
-	unsigned long present_pages = 0;
-	enum zone_type zt;
-
-	arg->status_change_nid = NUMA_NO_NODE;
-	arg->status_change_nid_normal = NUMA_NO_NODE;
-
-	/*
-	 * Check whether node_states[N_NORMAL_MEMORY] will be changed.
-	 * If the memory to be offline is within the range
-	 * [0..ZONE_NORMAL], and it is the last present memory there,
-	 * the zones in that range will become empty after the offlining,
-	 * thus we can determine that we need to clear the node from
-	 * node_states[N_NORMAL_MEMORY].
-	 */
-	for (zt = 0; zt <= ZONE_NORMAL; zt++)
-		present_pages += pgdat->node_zones[zt].present_pages;
-	if (zone_idx(zone) <= ZONE_NORMAL && nr_pages >= present_pages)
-		arg->status_change_nid_normal = zone_to_nid(zone);
-
-	/*
-	 * We have accounted the pages from [0..ZONE_NORMAL); ZONE_HIGHMEM
-	 * does not apply as we don't support 32bit.
-	 * Here we count the possible pages from ZONE_MOVABLE.
-	 * If after having accounted all the pages, we see that the nr_pages
-	 * to be offlined is over or equal to the accounted pages,
-	 * we know that the node will become empty, and so, we can clear
-	 * it for N_MEMORY as well.
-	 */
-	present_pages += pgdat->node_zones[ZONE_MOVABLE].present_pages;
-
-	if (nr_pages >= present_pages)
-		arg->status_change_nid = zone_to_nid(zone);
-}
-
-static void node_states_clear_node(int node, struct memory_notify *arg)
-{
-	if (arg->status_change_nid_normal >= 0)
-		node_clear_state(node, N_NORMAL_MEMORY);
-
-	if (arg->status_change_nid >= 0)
-		node_clear_state(node, N_MEMORY);
-}
-
 static int count_system_ram_pages_cb(unsigned long start_pfn,
 				     unsigned long nr_pages, void *data)
 {
@@ -1949,11 +1897,18 @@ static int count_system_ram_pages_cb(unsigned long start_pfn,
 int offline_pages(unsigned long start_pfn, unsigned long nr_pages,
 			struct zone *zone, struct memory_group *group)
 {
-	const unsigned long end_pfn = start_pfn + nr_pages;
 	unsigned long pfn, managed_pages, system_ram_pages = 0;
+	const unsigned long end_pfn = start_pfn + nr_pages;
+	struct pglist_data *pgdat = zone->zone_pgdat;
 	const int node = zone_to_nid(zone);
+	struct memory_notify mem_arg = {
+		.start_pfn = start_pfn,
+		.nr_pages = nr_pages,
+	};
+	struct node_notify node_arg = {
+		.nid = NUMA_NO_NODE,
+	};
 	unsigned long flags;
-	struct memory_notify arg;
 	char *reason;
 	int ret;
 
@@ -2005,18 +1960,28 @@ int offline_pages(unsigned long start_pfn, unsigned long nr_pages,
 
 	/* set above range as isolated */
 	ret = start_isolate_page_range(start_pfn, end_pfn,
-				       MIGRATE_MOVABLE,
-				       MEMORY_OFFLINE | REPORT_FAILURE);
+				       PB_ISOLATE_MODE_MEM_OFFLINE);
 	if (ret) {
 		reason = "failure to isolate range";
 		goto failed_removal_pcplists_disabled;
 	}
 
-	arg.start_pfn = start_pfn;
-	arg.nr_pages = nr_pages;
-	node_states_check_changes_offline(nr_pages, zone, &arg);
+	/*
+	 * Check whether the node will have no present pages after we offline
+	 * 'nr_pages' more. If so, we know that the node will become empty, and
+	 * so we will clear N_MEMORY for it.
+	 */
+	if (nr_pages >= pgdat->node_present_pages) {
+		node_arg.nid = node;
+		ret = node_notify(NODE_REMOVING_LAST_MEMORY, &node_arg);
+		ret = notifier_to_errno(ret);
+		if (ret) {
+			reason = "node notifier failure";
+			goto failed_removal_isolated;
+		}
+	}
 
-	ret = memory_notify(MEM_GOING_OFFLINE, &arg);
+	ret = memory_notify(MEM_GOING_OFFLINE, &mem_arg);
 	ret = notifier_to_errno(ret);
 	if (ret) {
 		reason = "notifier failure";
@@ -2065,7 +2030,8 @@ int offline_pages(unsigned long start_pfn, unsigned long nr_pages,
 			goto failed_removal_isolated;
 		}
 
-		ret = test_pages_isolated(start_pfn, end_pfn, MEMORY_OFFLINE);
+		ret = test_pages_isolated(start_pfn, end_pfn,
+					  PB_ISOLATE_MODE_MEM_OFFLINE);
 
 	} while (ret);
 
@@ -2096,27 +2062,32 @@ int offline_pages(unsigned long start_pfn, unsigned long nr_pages,
 	 * Make sure to mark the node as memory-less before rebuilding the zone
 	 * list. Otherwise this node would still appear in the fallback lists.
 	 */
-	node_states_clear_node(node, &arg);
+	if (node_arg.nid >= 0)
+		node_clear_state(node, N_MEMORY);
 	if (!populated_zone(zone)) {
 		zone_pcp_reset(zone);
 		build_all_zonelists(NULL);
 	}
 
-	if (arg.status_change_nid >= 0) {
+	if (node_arg.nid >= 0) {
 		kcompactd_stop(node);
 		kswapd_stop(node);
+		/* Node went memoryless. Notify consumers */
+		node_notify(NODE_REMOVED_LAST_MEMORY, &node_arg);
 	}
 
 	writeback_set_ratelimit();
 
-	memory_notify(MEM_OFFLINE, &arg);
+	memory_notify(MEM_OFFLINE, &mem_arg);
 	remove_pfn_range_from_zone(zone, start_pfn, nr_pages);
 	return 0;
 
 failed_removal_isolated:
 	/* pushback to free area */
-	undo_isolate_page_range(start_pfn, end_pfn, MIGRATE_MOVABLE);
-	memory_notify(MEM_CANCEL_OFFLINE, &arg);
+	undo_isolate_page_range(start_pfn, end_pfn);
+	memory_notify(MEM_CANCEL_OFFLINE, &mem_arg);
+	if (node_arg.nid != NUMA_NO_NODE)
+		node_notify(NODE_CANCEL_REMOVING_LAST_MEMORY, &node_arg);
 failed_removal_pcplists_disabled:
 	lru_cache_enable();
 	zone_pcp_enable(zone);