Merge tag 'mm-stable-2024-09-20-02-31' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:
 "Along with the usual shower of singleton patches, notable patch series
  in this pull request are:

   - "Align kvrealloc() with krealloc()" from Danilo Krummrich. Adds
     consistency to the APIs and behaviour of these two core allocation
     functions. This also simplifies/enables Rustification.

   - "Some cleanups for shmem" from Baolin Wang. No functional changes -
     mode code reuse, better function naming, logic simplifications.

   - "mm: some small page fault cleanups" from Josef Bacik. No
     functional changes - code cleanups only.

   - "Various memory tiering fixes" from Zi Yan. A small fix and a
     little cleanup.

   - "mm/swap: remove boilerplate" from Yu Zhao. Code cleanups and
     simplifications and .text shrinkage.

   - "Kernel stack usage histogram" from Pasha Tatashin and Shakeel
     Butt. This is a feature, it adds new feilds to /proc/vmstat such as

       $ grep kstack /proc/vmstat
       kstack_1k 3
       kstack_2k 188
       kstack_4k 11391
       kstack_8k 243
       kstack_16k 0

     which tells us that 11391 processes used 4k of stack while none at
     all used 16k. Useful for some system tuning things, but
     partivularly useful for "the dynamic kernel stack project".

   - "kmemleak: support for percpu memory leak detect" from Pavel
     Tikhomirov. Teaches kmemleak to detect leaksage of percpu memory.

   - "mm: memcg: page counters optimizations" from Roman Gushchin. "3
     independent small optimizations of page counters".

   - "mm: split PTE/PMD PT table Kconfig cleanups+clarifications" from
     David Hildenbrand. Improves PTE/PMD splitlock detection, makes
     powerpc/8xx work correctly by design rather than by accident.

   - "mm: remove arch_make_page_accessible()" from David Hildenbrand.
     Some folio conversions which make arch_make_page_accessible()
     unneeded.

   - "mm, memcg: cg2 memory{.swap,}.peak write handlers" fro David
     Finkel. Cleans up and fixes our handling of the resetting of the
     cgroup/process peak-memory-use detector.

   - "Make core VMA operations internal and testable" from Lorenzo
     Stoakes. Rationalizaion and encapsulation of the VMA manipulation
     APIs. With a view to better enable testing of the VMA functions,
     even from a userspace-only harness.

   - "mm: zswap: fixes for global shrinker" from Takero Funaki. Fix
     issues in the zswap global shrinker, resulting in improved
     performance.

   - "mm: print the promo watermark in zoneinfo" from Kaiyang Zhao. Fill
     in some missing info in /proc/zoneinfo.

   - "mm: replace follow_page() by folio_walk" from David Hildenbrand.
     Code cleanups and rationalizations (conversion to folio_walk())
     resulting in the removal of follow_page().

   - "improving dynamic zswap shrinker protection scheme" from Nhat
     Pham. Some tuning to improve zswap's dynamic shrinker. Significant
     reductions in swapin and improvements in performance are shown.

   - "mm: Fix several issues with unaccepted memory" from Kirill
     Shutemov. Improvements to the new unaccepted memory feature,

   - "mm/mprotect: Fix dax puds" from Peter Xu. Implements mprotect on
     DAX PUDs. This was missing, although nobody seems to have notied
     yet.

   - "Introduce a store type enum for the Maple tree" from Sidhartha
     Kumar. Cleanups and modest performance improvements for the maple
     tree library code.

   - "memcg: further decouple v1 code from v2" from Shakeel Butt. Move
     more cgroup v1 remnants away from the v2 memcg code.

   - "memcg: initiate deprecation of v1 features" from Shakeel Butt.
     Adds various warnings telling users that memcg v1 features are
     deprecated.

   - "mm: swap: mTHP swap allocator base on swap cluster order" from
     Chris Li. Greatly improves the success rate of the mTHP swap
     allocation.

   - "mm: introduce numa_memblks" from Mike Rapoport. Moves various
     disparate per-arch implementations of numa_memblk code into generic
     code.

   - "mm: batch free swaps for zap_pte_range()" from Barry Song. Greatly
     improves the performance of munmap() of swap-filled ptes.

   - "support large folio swap-out and swap-in for shmem" from Baolin
     Wang. With this series we no longer split shmem large folios into
     simgle-page folios when swapping out shmem.

   - "mm/hugetlb: alloc/free gigantic folios" from Yu Zhao. Nice
     performance improvements and code reductions for gigantic folios.

   - "support shmem mTHP collapse" from Baolin Wang. Adds support for
     khugepaged's collapsing of shmem mTHP folios.

   - "mm: Optimize mseal checks" from Pedro Falcato. Fixes an mprotect()
     performance regression due to the addition of mseal().

   - "Increase the number of bits available in page_type" from Matthew
     Wilcox. Increases the number of bits available in page_type!

   - "Simplify the page flags a little" from Matthew Wilcox. Many legacy
     page flags are now folio flags, so the page-based flags and their
     accessors/mutators can be removed.

   - "mm: store zero pages to be swapped out in a bitmap" from Usama
     Arif. An optimization which permits us to avoid writing/reading
     zero-filled zswap pages to backing store.

   - "Avoid MAP_FIXED gap exposure" from Liam Howlett. Fixes a race
     window which occurs when a MAP_FIXED operqtion is occurring during
     an unrelated vma tree walk.

   - "mm: remove vma_merge()" from Lorenzo Stoakes. Major rotorooting of
     the vma_merge() functionality, making ot cleaner, more testable and
     better tested.

   - "misc fixups for DAMON {self,kunit} tests" from SeongJae Park.
     Minor fixups of DAMON selftests and kunit tests.

   - "mm: memory_hotplug: improve do_migrate_range()" from Kefeng Wang.
     Code cleanups and folio conversions.

   - "Shmem mTHP controls and stats improvements" from Ryan Roberts.
     Cleanups for shmem controls and stats.

   - "mm: count the number of anonymous THPs per size" from Barry Song.
     Expose additional anon THP stats to userspace for improved tuning.

   - "mm: finish isolate/putback_lru_page()" from Kefeng Wang: more
     folio conversions and removal of now-unused page-based APIs.

   - "replace per-quota region priorities histogram buffer with
     per-context one" from SeongJae Park. DAMON histogram
     rationalization.

   - "Docs/damon: update GitHub repo URLs and maintainer-profile" from
     SeongJae Park. DAMON documentation updates.

   - "mm/vdpa: correct misuse of non-direct-reclaim __GFP_NOFAIL and
     improve related doc and warn" from Jason Wang: fixes usage of page
     allocator __GFP_NOFAIL and GFP_ATOMIC flags.

   - "mm: split underused THPs" from Yu Zhao. Improve THP=always policy.
     This was overprovisioning THPs in sparsely accessed memory areas.

   - "zram: introduce custom comp backends API" frm Sergey Senozhatsky.
     Add support for zram run-time compression algorithm tuning.

   - "mm: Care about shadow stack guard gap when getting an unmapped
     area" from Mark Brown. Fix up the various arch_get_unmapped_area()
     implementations to better respect guard areas.

   - "Improve mem_cgroup_iter()" from Kinsey Ho. Improve the reliability
     of mem_cgroup_iter() and various code cleanups.

   - "mm: Support huge pfnmaps" from Peter Xu. Extends the usage of huge
     pfnmap support.

   - "resource: Fix region_intersects() vs add_memory_driver_managed()"
     from Huang Ying. Fix a bug in region_intersects() for systems with
     CXL memory.

   - "mm: hwpoison: two more poison recovery" from Kefeng Wang. Teaches
     a couple more code paths to correctly recover from the encountering
     of poisoned memry.

   - "mm: enable large folios swap-in support" from Barry Song. Support
     the swapin of mTHP memory into appropriately-sized folios, rather
     than into single-page folios"

* tag 'mm-stable-2024-09-20-02-31' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (416 commits)
  zram: free secondary algorithms names
  uprobes: turn xol_area->pages[2] into xol_area->page
  uprobes: introduce the global struct vm_special_mapping xol_mapping
  Revert "uprobes: use vm_special_mapping close() functionality"
  mm: support large folios swap-in for sync io devices
  mm: add nr argument in mem_cgroup_swapin_uncharge_swap() helper to support large folios
  mm: fix swap_read_folio_zeromap() for large folios with partial zeromap
  mm/debug_vm_pgtable: Use pxdp_get() for accessing page table entries
  set_memory: add __must_check to generic stubs
  mm/vma: return the exact errno in vms_gather_munmap_vmas()
  memcg: cleanup with !CONFIG_MEMCG_V1
  mm/show_mem.c: report alloc tags in human readable units
  mm: support poison recovery from copy_present_page()
  mm: support poison recovery from do_cow_fault()
  resource, kunit: add test case for region_intersects()
  resource: make alloc_free_mem_region() works for iomem_resource
  mm: z3fold: deprecate CONFIG_Z3FOLD
  vfio/pci: implement huge_fault support
  mm/arm64: support large pfn mappings
  mm/x86: support large pfn mappings
  ...

1 files changed, 219 insertions, 130 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0aefae4a26b2..8afab64814dc 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -286,9 +286,7 @@ EXPORT_SYMBOL(nr_online_nodes);
 #endif
 
 static bool page_contains_unaccepted(struct page *page, unsigned int order);
-static void accept_page(struct page *page, unsigned int order);
 static bool cond_accept_memory(struct zone *zone, unsigned int order);
-static inline bool has_unaccepted_memory(void);
 static bool __free_unaccepted(struct page *page);
 
 int page_group_by_mobility_disabled __read_mostly;
@@ -322,6 +320,11 @@ static inline bool deferred_pages_enabled(void)
 {
 	return false;
 }
+
+static inline bool _deferred_grow_zone(struct zone *zone, unsigned int order)
+{
+	return false;
+}
 #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
 
 /* Return a pointer to the bitmap storing bits affecting a block of pages */
@@ -958,8 +961,9 @@ static int free_tail_page_prepare(struct page *head_page, struct page *page)
 		break;
 	case 2:
 		/* the second tail page: deferred_list overlaps ->mapping */
-		if (unlikely(!list_empty(&folio->_deferred_list))) {
-			bad_page(page, "on deferred list");
+		if (unlikely(!list_empty(&folio->_deferred_list) &&
+		    folio_test_partially_mapped(folio))) {
+			bad_page(page, "partially mapped folio on deferred list");
 			goto out;
 		}
 		break;
@@ -1087,8 +1091,11 @@ __always_inline bool free_pages_prepare(struct page *page,
 			(page + i)->flags &= ~PAGE_FLAGS_CHECK_AT_PREP;
 		}
 	}
-	if (PageMappingFlags(page))
+	if (PageMappingFlags(page)) {
+		if (PageAnon(page))
+			mod_mthp_stat(order, MTHP_STAT_NR_ANON, -1);
 		page->mapping = NULL;
+	}
 	if (is_check_pages_enabled()) {
 		if (free_page_is_bad(page))
 			bad++;
@@ -1199,17 +1206,39 @@ static void free_pcppages_bulk(struct zone *zone, int count,
 	spin_unlock_irqrestore(&zone->lock, flags);
 }
 
+/* Split a multi-block free page into its individual pageblocks. */
+static void split_large_buddy(struct zone *zone, struct page *page,
+			      unsigned long pfn, int order, fpi_t fpi)
+{
+	unsigned long end = pfn + (1 << order);
+
+	VM_WARN_ON_ONCE(!IS_ALIGNED(pfn, 1 << order));
+	/* Caller removed page from freelist, buddy info cleared! */
+	VM_WARN_ON_ONCE(PageBuddy(page));
+
+	if (order > pageblock_order)
+		order = pageblock_order;
+
+	while (pfn != end) {
+		int mt = get_pfnblock_migratetype(page, pfn);
+
+		__free_one_page(page, pfn, zone, order, mt, fpi);
+		pfn += 1 << order;
+		page = pfn_to_page(pfn);
+	}
+}
+
 static void free_one_page(struct zone *zone, struct page *page,
 			  unsigned long pfn, unsigned int order,
 			  fpi_t fpi_flags)
 {
 	unsigned long flags;
-	int migratetype;
 
 	spin_lock_irqsave(&zone->lock, flags);
-	migratetype = get_pfnblock_migratetype(page, pfn);
-	__free_one_page(page, pfn, zone, order, migratetype, fpi_flags);
+	split_large_buddy(zone, page, pfn, order, fpi_flags);
 	spin_unlock_irqrestore(&zone->lock, flags);
+
+	__count_vm_events(PGFREE, 1 << order);
 }
 
 static void __free_pages_ok(struct page *page, unsigned int order,
@@ -1218,12 +1247,8 @@ static void __free_pages_ok(struct page *page, unsigned int order,
 	unsigned long pfn = page_to_pfn(page);
 	struct zone *zone = page_zone(page);
 
-	if (!free_pages_prepare(page, order))
-		return;
-
-	free_one_page(zone, page, pfn, order, fpi_flags);
-
-	__count_vm_events(PGFREE, 1 << order);
+	if (free_pages_prepare(page, order))
+		free_one_page(zone, page, pfn, order, fpi_flags);
 }
 
 void __meminit __free_pages_core(struct page *page, unsigned int order,
@@ -1270,7 +1295,7 @@ void __meminit __free_pages_core(struct page *page, unsigned int order,
 		if (order == MAX_PAGE_ORDER && __free_unaccepted(page))
 			return;
 
-		accept_page(page, order);
+		accept_memory(page_to_phys(page), PAGE_SIZE << order);
 	}
 
 	/*
@@ -1346,11 +1371,11 @@ struct page *__pageblock_pfn_to_page(unsigned long start_pfn,
  *
  * -- nyc
  */
-static inline void expand(struct zone *zone, struct page *page,
-	int low, int high, int migratetype)
+static inline unsigned int expand(struct zone *zone, struct page *page, int low,
+				  int high, int migratetype)
 {
-	unsigned long size = 1 << high;
-	unsigned long nr_added = 0;
+	unsigned int size = 1 << high;
+	unsigned int nr_added = 0;
 
 	while (high > low) {
 		high--;
@@ -1370,7 +1395,19 @@ static inline void expand(struct zone *zone, struct page *page,
 		set_buddy_order(&page[size], high);
 		nr_added += size;
 	}
-	account_freepages(zone, nr_added, migratetype);
+
+	return nr_added;
+}
+
+static __always_inline void page_del_and_expand(struct zone *zone,
+						struct page *page, int low,
+						int high, int migratetype)
+{
+	int nr_pages = 1 << high;
+
+	__del_page_from_free_list(page, zone, high, migratetype);
+	nr_pages -= expand(zone, page, low, high, migratetype);
+	account_freepages(zone, -nr_pages, migratetype);
 }
 
 static void check_new_page_bad(struct page *page)
@@ -1540,8 +1577,9 @@ struct page *__rmqueue_smallest(struct zone *zone, unsigned int order,
 		page = get_page_from_free_area(area, migratetype);
 		if (!page)
 			continue;
-		del_page_from_free_list(page, zone, current_order, migratetype);
-		expand(zone, page, order, current_order, migratetype);
+
+		page_del_and_expand(zone, page, order, current_order,
+				    migratetype);
 		trace_mm_page_alloc_zone_locked(page, order, migratetype,
 				pcp_allowed_order(order) &&
 				migratetype < MIGRATE_PCPTYPES);
@@ -1700,27 +1738,6 @@ static unsigned long find_large_buddy(unsigned long start_pfn)
 	return start_pfn;
 }
 
-/* Split a multi-block free page into its individual pageblocks */
-static void split_large_buddy(struct zone *zone, struct page *page,
-			      unsigned long pfn, int order)
-{
-	unsigned long end_pfn = pfn + (1 << order);
-
-	VM_WARN_ON_ONCE(order <= pageblock_order);
-	VM_WARN_ON_ONCE(pfn & (pageblock_nr_pages - 1));
-
-	/* Caller removed page from freelist, buddy info cleared! */
-	VM_WARN_ON_ONCE(PageBuddy(page));
-
-	while (pfn != end_pfn) {
-		int mt = get_pfnblock_migratetype(page, pfn);
-
-		__free_one_page(page, pfn, zone, pageblock_order, mt, FPI_NONE);
-		pfn += pageblock_nr_pages;
-		page = pfn_to_page(pfn);
-	}
-}
-
 /**
  * move_freepages_block_isolate - move free pages in block for page isolation
  * @zone: the zone
@@ -1761,7 +1778,7 @@ bool move_freepages_block_isolate(struct zone *zone, struct page *page,
 		del_page_from_free_list(buddy, zone, order,
 					get_pfnblock_migratetype(buddy, pfn));
 		set_pageblock_migratetype(page, migratetype);
-		split_large_buddy(zone, buddy, pfn, order);
+		split_large_buddy(zone, buddy, pfn, order, FPI_NONE);
 		return true;
 	}
 
@@ -1772,7 +1789,7 @@ bool move_freepages_block_isolate(struct zone *zone, struct page *page,
 		del_page_from_free_list(page, zone, order,
 					get_pfnblock_migratetype(page, pfn));
 		set_pageblock_migratetype(page, migratetype);
-		split_large_buddy(zone, page, pfn, order);
+		split_large_buddy(zone, page, pfn, order, FPI_NONE);
 		return true;
 	}
 move:
@@ -1892,9 +1909,12 @@ steal_suitable_fallback(struct zone *zone, struct page *page,
 
 	/* Take ownership for orders >= pageblock_order */
 	if (current_order >= pageblock_order) {
+		unsigned int nr_added;
+
 		del_page_from_free_list(page, zone, current_order, block_type);
 		change_pageblock_range(page, current_order, start_type);
-		expand(zone, page, order, current_order, start_type);
+		nr_added = expand(zone, page, order, current_order, start_type);
+		account_freepages(zone, nr_added, start_type);
 		return page;
 	}
 
@@ -1947,8 +1967,7 @@ steal_suitable_fallback(struct zone *zone, struct page *page,
 	}
 
 single_page:
-	del_page_from_free_list(page, zone, current_order, block_type);
-	expand(zone, page, order, current_order, block_type);
+	page_del_and_expand(zone, page, order, current_order, block_type);
 	return page;
 }
 
@@ -2764,7 +2783,7 @@ void split_page(struct page *page, unsigned int order)
 	for (i = 1; i < (1 << order); i++)
 		set_page_refcounted(page + i);
 	split_page_owner(page, order, 0);
-	pgalloc_tag_split(page, 1 << order);
+	pgalloc_tag_split(page_folio(page), order, 0);
 	split_page_memcg(page, order, 0);
 }
 EXPORT_SYMBOL_GPL(split_page);
@@ -3033,12 +3052,6 @@ struct page *rmqueue(struct zone *preferred_zone,
 {
 	struct page *page;
 
-	/*
-	 * We most definitely don't want callers attempting to
-	 * allocate greater than order-1 page units with __GFP_NOFAIL.
-	 */
-	WARN_ON_ONCE((gfp_flags & __GFP_NOFAIL) && (order > 1));
-
 	if (likely(pcp_allowed_order(order))) {
 		page = rmqueue_pcplist(preferred_zone, zone, order,
 				       migratetype, alloc_flags);
@@ -3357,7 +3370,7 @@ retry:
 		}
 
 		if (no_fallback && nr_online_nodes > 1 &&
-		    zone != ac->preferred_zoneref->zone) {
+		    zone != zonelist_zone(ac->preferred_zoneref)) {
 			int local_nid;
 
 			/*
@@ -3365,7 +3378,7 @@ retry:
 			 * fragmenting fallbacks. Locality is more important
 			 * than fragmentation avoidance.
 			 */
-			local_nid = zone_to_nid(ac->preferred_zoneref->zone);
+			local_nid = zonelist_node_idx(ac->preferred_zoneref);
 			if (zone_to_nid(zone) != local_nid) {
 				alloc_flags &= ~ALLOC_NOFRAGMENT;
 				goto retry;
@@ -3402,7 +3415,6 @@ check_alloc_wmark:
 			if (cond_accept_memory(zone, order))
 				goto try_this_zone;
 
-#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
 			/*
 			 * Watermark failed for this zone, but see if we can
 			 * grow this zone if it contains deferred pages.
@@ -3411,14 +3423,13 @@ check_alloc_wmark:
 				if (_deferred_grow_zone(zone, order))
 					goto try_this_zone;
 			}
-#endif
 			/* Checked here to keep the fast path fast */
 			BUILD_BUG_ON(ALLOC_NO_WATERMARKS < NR_WMARK);
 			if (alloc_flags & ALLOC_NO_WATERMARKS)
 				goto try_this_zone;
 
 			if (!node_reclaim_enabled() ||
-			    !zone_allows_reclaim(ac->preferred_zoneref->zone, zone))
+			    !zone_allows_reclaim(zonelist_zone(ac->preferred_zoneref), zone))
 				continue;
 
 			ret = node_reclaim(zone->zone_pgdat, gfp_mask, order);
@@ -3440,7 +3451,7 @@ check_alloc_wmark:
 		}
 
 try_this_zone:
-		page = rmqueue(ac->preferred_zoneref->zone, zone, order,
+		page = rmqueue(zonelist_zone(ac->preferred_zoneref), zone, order,
 				gfp_mask, alloc_flags, ac->migratetype);
 		if (page) {
 			prep_new_page(page, order, gfp_mask, alloc_flags);
@@ -3457,13 +3468,11 @@ try_this_zone:
 			if (cond_accept_memory(zone, order))
 				goto try_this_zone;
 
-#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
 			/* Try again if zone has deferred pages */
 			if (deferred_pages_enabled()) {
 				if (_deferred_grow_zone(zone, order))
 					goto try_this_zone;
 			}
-#endif
 		}
 	}
 
@@ -4100,6 +4109,11 @@ should_reclaim_retry(gfp_t gfp_mask, unsigned order,
 		unsigned long min_wmark = min_wmark_pages(zone);
 		bool wmark;
 
+		if (cpusets_enabled() &&
+			(alloc_flags & ALLOC_CPUSET) &&
+			!__cpuset_zone_allowed(zone, gfp_mask))
+				continue;
+
 		available = reclaimable = zone_reclaimable_pages(zone);
 		available += zone_page_state_snapshot(zone, NR_FREE_PAGES);
 
@@ -4175,6 +4189,7 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order,
 {
 	bool can_direct_reclaim = gfp_mask & __GFP_DIRECT_RECLAIM;
 	bool can_compact = gfp_compaction_allowed(gfp_mask);
+	bool nofail = gfp_mask & __GFP_NOFAIL;
 	const bool costly_order = order > PAGE_ALLOC_COSTLY_ORDER;
 	struct page *page = NULL;
 	unsigned int alloc_flags;
@@ -4187,6 +4202,25 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order,
 	unsigned int zonelist_iter_cookie;
 	int reserve_flags;
 
+	if (unlikely(nofail)) {
+		/*
+		 * We most definitely don't want callers attempting to
+		 * allocate greater than order-1 page units with __GFP_NOFAIL.
+		 */
+		WARN_ON_ONCE(order > 1);
+		/*
+		 * Also we don't support __GFP_NOFAIL without __GFP_DIRECT_RECLAIM,
+		 * otherwise, we may result in lockup.
+		 */
+		WARN_ON_ONCE(!can_direct_reclaim);
+		/*
+		 * PF_MEMALLOC request from this context is rather bizarre
+		 * because we cannot reclaim anything and only can loop waiting
+		 * for somebody to do a work for us.
+		 */
+		WARN_ON_ONCE(current->flags & PF_MEMALLOC);
+	}
+
 restart:
 	compaction_retries = 0;
 	no_progress_loops = 0;
@@ -4209,7 +4243,7 @@ restart:
 	 */
 	ac->preferred_zoneref = first_zones_zonelist(ac->zonelist,
 					ac->highest_zoneidx, ac->nodemask);
-	if (!ac->preferred_zoneref->zone)
+	if (!zonelist_zone(ac->preferred_zoneref))
 		goto nopage;
 
 	/*
@@ -4221,7 +4255,7 @@ restart:
 		struct zoneref *z = first_zones_zonelist(ac->zonelist,
 					ac->highest_zoneidx,
 					&cpuset_current_mems_allowed);
-		if (!z->zone)
+		if (!zonelist_zone(z))
 			goto nopage;
 	}
 
@@ -4404,30 +4438,16 @@ nopage:
 	 * Make sure that __GFP_NOFAIL request doesn't leak out and make sure
 	 * we always retry
 	 */
-	if (gfp_mask & __GFP_NOFAIL) {
+	if (unlikely(nofail)) {
 		/*
-		 * All existing users of the __GFP_NOFAIL are blockable, so warn
-		 * of any new users that actually require GFP_NOWAIT
+		 * Lacking direct_reclaim we can't do anything to reclaim memory,
+		 * we disregard these unreasonable nofail requests and still
+		 * return NULL
 		 */
-		if (WARN_ON_ONCE_GFP(!can_direct_reclaim, gfp_mask))
+		if (!can_direct_reclaim)
 			goto fail;
 
 		/*
-		 * PF_MEMALLOC request from this context is rather bizarre
-		 * because we cannot reclaim anything and only can loop waiting
-		 * for somebody to do a work for us
-		 */
-		WARN_ON_ONCE_GFP(current->flags & PF_MEMALLOC, gfp_mask);
-
-		/*
-		 * non failing costly orders are a hard requirement which we
-		 * are not prepared for much so let's warn about these users
-		 * so that we can identify them and convert them to something
-		 * else.
-		 */
-		WARN_ON_ONCE_GFP(costly_order, gfp_mask);
-
-		/*
 		 * Help non-failing allocations by giving some access to memory
 		 * reserves normally used for high priority non-blocking
 		 * allocations but do not use ALLOC_NO_WATERMARKS because this
@@ -4578,17 +4598,28 @@ unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid,
 			continue;
 		}
 
-		if (nr_online_nodes > 1 && zone != ac.preferred_zoneref->zone &&
-		    zone_to_nid(zone) != zone_to_nid(ac.preferred_zoneref->zone)) {
+		if (nr_online_nodes > 1 && zone != zonelist_zone(ac.preferred_zoneref) &&
+		    zone_to_nid(zone) != zonelist_node_idx(ac.preferred_zoneref)) {
 			goto failed;
 		}
 
+		cond_accept_memory(zone, 0);
+retry_this_zone:
 		mark = wmark_pages(zone, alloc_flags & ALLOC_WMARK_MASK) + nr_pages;
 		if (zone_watermark_fast(zone, 0,  mark,
 				zonelist_zone_idx(ac.preferred_zoneref),
 				alloc_flags, gfp)) {
 			break;
 		}
+
+		if (cond_accept_memory(zone, 0))
+			goto retry_this_zone;
+
+		/* Try again if zone has deferred pages */
+		if (deferred_pages_enabled()) {
+			if (_deferred_grow_zone(zone, 0))
+				goto retry_this_zone;
+		}
 	}
 
 	/*
@@ -4638,7 +4669,7 @@ unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid,
 	pcp_trylock_finish(UP_flags);
 
 	__count_zid_vm_events(PGALLOC, zone_idx(zone), nr_account);
-	zone_statistics(ac.preferred_zoneref->zone, zone, nr_account);
+	zone_statistics(zonelist_zone(ac.preferred_zoneref), zone, nr_account);
 
 out:
 	return nr_populated;
@@ -4696,7 +4727,7 @@ struct page *__alloc_pages_noprof(gfp_t gfp, unsigned int order,
 	 * Forbid the first pass from falling back to types that fragment
 	 * memory until all local zones are considered.
 	 */
-	alloc_flags |= alloc_flags_nofragment(ac.preferred_zoneref->zone, gfp);
+	alloc_flags |= alloc_flags_nofragment(zonelist_zone(ac.preferred_zoneref), gfp);
 
 	/* First allocation attempt */
 	page = get_page_from_freelist(alloc_gfp, order, alloc_flags, &ac);
@@ -4950,7 +4981,7 @@ static void *make_alloc_exact(unsigned long addr, unsigned int order,
 		struct page *last = page + nr;
 
 		split_page_owner(page, order, 0);
-		pgalloc_tag_split(page, 1 << order);
+		pgalloc_tag_split(page_folio(page), order, 0);
 		split_page_memcg(page, order, 0);
 		while (page < --last)
 			set_page_refcounted(last);
@@ -5301,7 +5332,7 @@ int local_memory_node(int node)
 	z = first_zones_zonelist(node_zonelist(node, GFP_KERNEL),
 				   gfp_zone(GFP_KERNEL),
 				   NULL);
-	return zone_to_nid(z->zone);
+	return zonelist_node_idx(z);
 }
 #endif
 
@@ -6433,6 +6464,31 @@ int __alloc_contig_migrate_range(struct compact_control *cc,
 	return (ret < 0) ? ret : 0;
 }
 
+static void split_free_pages(struct list_head *list)
+{
+	int order;
+
+	for (order = 0; order < NR_PAGE_ORDERS; order++) {
+		struct page *page, *next;
+		int nr_pages = 1 << order;
+
+		list_for_each_entry_safe(page, next, &list[order], lru) {
+			int i;
+
+			post_alloc_hook(page, order, __GFP_MOVABLE);
+			if (!order)
+				continue;
+
+			split_page(page, order);
+
+			/* Add all subpages to the order-0 head, in sequence. */
+			list_del(&page->lru);
+			for (i = 0; i < nr_pages; i++)
+				list_add_tail(&page[i].lru, &list[0]);
+		}
+	}
+}
+
 /**
  * alloc_contig_range() -- tries to allocate given range of pages
  * @start:	start PFN to allocate
@@ -6545,12 +6601,25 @@ int alloc_contig_range_noprof(unsigned long start, unsigned long end,
 		goto done;
 	}
 
-	/* Free head and tail (if any) */
-	if (start != outer_start)
-		free_contig_range(outer_start, start - outer_start);
-	if (end != outer_end)
-		free_contig_range(end, outer_end - end);
+	if (!(gfp_mask & __GFP_COMP)) {
+		split_free_pages(cc.freepages);
 
+		/* Free head and tail (if any) */
+		if (start != outer_start)
+			free_contig_range(outer_start, start - outer_start);
+		if (end != outer_end)
+			free_contig_range(end, outer_end - end);
+	} else if (start == outer_start && end == outer_end && is_power_of_2(end - start)) {
+		struct page *head = pfn_to_page(start);
+		int order = ilog2(end - start);
+
+		check_new_pages(head, order);
+		prep_new_page(head, order, gfp_mask, 0);
+	} else {
+		ret = -EINVAL;
+		WARN(true, "PFN range: requested [%lu, %lu), allocated [%lu, %lu)\n",
+		     start, end, outer_start, outer_end);
+	}
 done:
 	undo_isolate_page_range(start, end, migratetype);
 	return ret;
@@ -6659,6 +6728,18 @@ struct page *alloc_contig_pages_noprof(unsigned long nr_pages, gfp_t gfp_mask,
 void free_contig_range(unsigned long pfn, unsigned long nr_pages)
 {
 	unsigned long count = 0;
+	struct folio *folio = pfn_folio(pfn);
+
+	if (folio_test_large(folio)) {
+		int expected = folio_nr_pages(folio);
+
+		if (nr_pages == expected)
+			folio_put(folio);
+		else
+			WARN(true, "PFN %lu: nr_pages %lu != expected %d\n",
+			     pfn, nr_pages, expected);
+		return;
+	}
 
 	for (; nr_pages--; pfn++) {
 		struct page *page = pfn_to_page(pfn);
@@ -6927,23 +7008,50 @@ early_param("accept_memory", accept_memory_parse);
 static bool page_contains_unaccepted(struct page *page, unsigned int order)
 {
 	phys_addr_t start = page_to_phys(page);
-	phys_addr_t end = start + (PAGE_SIZE << order);
 
-	return range_contains_unaccepted_memory(start, end);
+	return range_contains_unaccepted_memory(start, PAGE_SIZE << order);
 }
 
-static void accept_page(struct page *page, unsigned int order)
+static void __accept_page(struct zone *zone, unsigned long *flags,
+			  struct page *page)
 {
-	phys_addr_t start = page_to_phys(page);
+	bool last;
+
+	list_del(&page->lru);
+	last = list_empty(&zone->unaccepted_pages);
+
+	account_freepages(zone, -MAX_ORDER_NR_PAGES, MIGRATE_MOVABLE);
+	__mod_zone_page_state(zone, NR_UNACCEPTED, -MAX_ORDER_NR_PAGES);
+	__ClearPageUnaccepted(page);
+	spin_unlock_irqrestore(&zone->lock, *flags);
+
+	accept_memory(page_to_phys(page), PAGE_SIZE << MAX_PAGE_ORDER);
+
+	__free_pages_ok(page, MAX_PAGE_ORDER, FPI_TO_TAIL);
 
-	accept_memory(start, start + (PAGE_SIZE << order));
+	if (last)
+		static_branch_dec(&zones_with_unaccepted_pages);
+}
+
+void accept_page(struct page *page)
+{
+	struct zone *zone = page_zone(page);
+	unsigned long flags;
+
+	spin_lock_irqsave(&zone->lock, flags);
+	if (!PageUnaccepted(page)) {
+		spin_unlock_irqrestore(&zone->lock, flags);
+		return;
+	}
+
+	/* Unlocks zone->lock */
+	__accept_page(zone, &flags, page);
 }
 
 static bool try_to_accept_memory_one(struct zone *zone)
 {
 	unsigned long flags;
 	struct page *page;
-	bool last;
 
 	spin_lock_irqsave(&zone->lock, flags);
 	page = list_first_entry_or_null(&zone->unaccepted_pages,
@@ -6953,23 +7061,17 @@ static bool try_to_accept_memory_one(struct zone *zone)
 		return false;
 	}
 
-	list_del(&page->lru);
-	last = list_empty(&zone->unaccepted_pages);
-
-	account_freepages(zone, -MAX_ORDER_NR_PAGES, MIGRATE_MOVABLE);
-	__mod_zone_page_state(zone, NR_UNACCEPTED, -MAX_ORDER_NR_PAGES);
-	spin_unlock_irqrestore(&zone->lock, flags);
-
-	accept_page(page, MAX_PAGE_ORDER);
-
-	__free_pages_ok(page, MAX_PAGE_ORDER, FPI_TO_TAIL);
-
-	if (last)
-		static_branch_dec(&zones_with_unaccepted_pages);
+	/* Unlocks zone->lock */
+	__accept_page(zone, &flags, page);
 
 	return true;
 }
 
+static inline bool has_unaccepted_memory(void)
+{
+	return static_branch_unlikely(&zones_with_unaccepted_pages);
+}
+
 static bool cond_accept_memory(struct zone *zone, unsigned int order)
 {
 	long to_accept;
@@ -6981,8 +7083,8 @@ static bool cond_accept_memory(struct zone *zone, unsigned int order)
 	if (list_empty(&zone->unaccepted_pages))
 		return false;
 
-	/* How much to accept to get to high watermark? */
-	to_accept = high_wmark_pages(zone) -
+	/* How much to accept to get to promo watermark? */
+	to_accept = promo_wmark_pages(zone) -
 		    (zone_page_state(zone, NR_FREE_PAGES) -
 		    __zone_watermark_unusable_free(zone, order, 0) -
 		    zone_page_state(zone, NR_UNACCEPTED));
@@ -6997,11 +7099,6 @@ static bool cond_accept_memory(struct zone *zone, unsigned int order)
 	return ret;
 }
 
-static inline bool has_unaccepted_memory(void)
-{
-	return static_branch_unlikely(&zones_with_unaccepted_pages);
-}
-
 static bool __free_unaccepted(struct page *page)
 {
 	struct zone *zone = page_zone(page);
@@ -7016,6 +7113,7 @@ static bool __free_unaccepted(struct page *page)
 	list_add_tail(&page->lru, &zone->unaccepted_pages);
 	account_freepages(zone, MAX_ORDER_NR_PAGES, MIGRATE_MOVABLE);
 	__mod_zone_page_state(zone, NR_UNACCEPTED, MAX_ORDER_NR_PAGES);
+	__SetPageUnaccepted(page);
 	spin_unlock_irqrestore(&zone->lock, flags);
 
 	if (first)
@@ -7031,20 +7129,11 @@ static bool page_contains_unaccepted(struct page *page, unsigned int order)
 	return false;
 }
 
-static void accept_page(struct page *page, unsigned int order)
-{
-}
-
 static bool cond_accept_memory(struct zone *zone, unsigned int order)
 {
 	return false;
 }
 
-static inline bool has_unaccepted_memory(void)
-{
-	return false;
-}
-
 static bool __free_unaccepted(struct page *page)
 {
 	BUILD_BUG();