Adding upstream version 6.8.9.upstream/6.8.9

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 37 insertions, 38 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index b1d9dcdabd..a663202045 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -727,7 +727,7 @@ buddy_merge_likely(unsigned long pfn, unsigned long buddy_pfn,
 	unsigned long higher_page_pfn;
 	struct page *higher_page;
 
-	if (order >= MAX_ORDER - 1)
+	if (order >= MAX_PAGE_ORDER - 1)
 		return false;
 
 	higher_page_pfn = buddy_pfn & pfn;
@@ -782,7 +782,7 @@ static inline void __free_one_page(struct page *page,
 	VM_BUG_ON_PAGE(pfn & ((1 << order) - 1), page);
 	VM_BUG_ON_PAGE(bad_range(zone, page), page);
 
-	while (order < MAX_ORDER) {
+	while (order < MAX_PAGE_ORDER) {
 		if (compaction_capture(capc, page, order, migratetype)) {
 			__mod_zone_freepage_state(zone, -(1 << order),
 								migratetype);
@@ -916,6 +916,9 @@ static inline bool page_expected_state(struct page *page,
 #ifdef CONFIG_MEMCG
 			page->memcg_data |
 #endif
+#ifdef CONFIG_PAGE_POOL
+			((page->pp_magic & ~0x3UL) == PP_SIGNATURE) |
+#endif
 			(page->flags & check_flags)))
 		return false;
 
@@ -942,6 +945,10 @@ static const char *page_bad_reason(struct page *page, unsigned long flags)
 	if (unlikely(page->memcg_data))
 		bad_reason = "page still charged to cgroup";
 #endif
+#ifdef CONFIG_PAGE_POOL
+	if (unlikely((page->pp_magic & ~0x3UL) == PP_SIGNATURE))
+		bad_reason = "page_pool leak";
+#endif
 	return bad_reason;
 }
 
@@ -1059,7 +1066,7 @@ static inline bool should_skip_kasan_poison(struct page *page, fpi_t fpi_flags)
 	if (IS_ENABLED(CONFIG_KASAN_GENERIC))
 		return deferred_pages_enabled();
 
-	return page_kasan_tag(page) == 0xff;
+	return page_kasan_tag(page) == KASAN_TAG_KERNEL;
 }
 
 static void kernel_init_pages(struct page *page, int numpages)
@@ -1086,13 +1093,11 @@ static __always_inline bool free_pages_prepare(struct page *page,
 	trace_mm_page_free(page, order);
 	kmsan_free_page(page, order);
 
+	if (memcg_kmem_online() && PageMemcgKmem(page))
+		__memcg_kmem_uncharge_page(page, order);
+
 	if (unlikely(PageHWPoison(page)) && !order) {
-		/*
-		 * Do not let hwpoison pages hit pcplists/buddy
-		 * Untie memcg state and reset page's owner
-		 */
-		if (memcg_kmem_online() && PageMemcgKmem(page))
-			__memcg_kmem_uncharge_page(page, order);
+		/* Do not let hwpoison pages hit pcplists/buddy */
 		reset_page_owner(page, order);
 		page_table_check_free(page, order);
 		return false;
@@ -1123,8 +1128,6 @@ static __always_inline bool free_pages_prepare(struct page *page,
 	}
 	if (PageMappingFlags(page))
 		page->mapping = NULL;
-	if (memcg_kmem_online() && PageMemcgKmem(page))
-		__memcg_kmem_uncharge_page(page, order);
 	if (is_check_pages_enabled()) {
 		if (free_page_is_bad(page))
 			bad++;
@@ -1259,7 +1262,6 @@ static void free_one_page(struct zone *zone,
 static void __free_pages_ok(struct page *page, unsigned int order,
 			    fpi_t fpi_flags)
 {
-	unsigned long flags;
 	int migratetype;
 	unsigned long pfn = page_to_pfn(page);
 	struct zone *zone = page_zone(page);
@@ -1274,13 +1276,7 @@ static void __free_pages_ok(struct page *page, unsigned int order,
 	 */
 	migratetype = get_pfnblock_migratetype(page, pfn);
 
-	spin_lock_irqsave(&zone->lock, flags);
-	if (unlikely(has_isolate_pageblock(zone) ||
-		is_migrate_isolate(migratetype))) {
-		migratetype = get_pfnblock_migratetype(page, pfn);
-	}
-	__free_one_page(page, pfn, zone, order, migratetype, fpi_flags);
-	spin_unlock_irqrestore(&zone->lock, flags);
+	free_one_page(zone, page, pfn, order, migratetype, fpi_flags);
 
 	__count_vm_events(PGFREE, 1 << order);
 }
@@ -1308,7 +1304,7 @@ void __free_pages_core(struct page *page, unsigned int order)
 	atomic_long_add(nr_pages, &page_zone(page)->managed_pages);
 
 	if (page_contains_unaccepted(page, order)) {
-		if (order == MAX_ORDER && __free_unaccepted(page))
+		if (order == MAX_PAGE_ORDER && __free_unaccepted(page))
 			return;
 
 		accept_page(page, order);
@@ -1338,7 +1334,7 @@ void __free_pages_core(struct page *page, unsigned int order)
  *
  * Note: the function may return non-NULL struct page even for a page block
  * which contains a memory hole (i.e. there is no physical memory for a subset
- * of the pfn range). For example, if the pageblock order is MAX_ORDER, which
+ * of the pfn range). For example, if the pageblock order is MAX_PAGE_ORDER, which
  * will fall into 2 sub-sections, and the end pfn of the pageblock may be hole
  * even though the start pfn is online and valid. This should be safe most of
  * the time because struct pages are still initialized via init_unavailable_range()
@@ -1571,7 +1567,7 @@ struct page *__rmqueue_smallest(struct zone *zone, unsigned int order,
 	struct page *page;
 
 	/* Find a page of the appropriate size in the preferred list */
-	for (current_order = order; current_order <= MAX_ORDER; ++current_order) {
+	for (current_order = order; current_order < NR_PAGE_ORDERS; ++current_order) {
 		area = &(zone->free_area[current_order]);
 		page = get_page_from_free_area(area, migratetype);
 		if (!page)
@@ -1884,10 +1880,14 @@ static void reserve_highatomic_pageblock(struct page *page, struct zone *zone)
 	unsigned long max_managed, flags;
 
 	/*
-	 * Limit the number reserved to 1 pageblock or roughly 1% of a zone.
+	 * The number reserved as: minimum is 1 pageblock, maximum is
+	 * roughly 1% of a zone. But if 1% of a zone falls below a
+	 * pageblock size, then don't reserve any pageblocks.
 	 * Check is race-prone but harmless.
 	 */
-	max_managed = (zone_managed_pages(zone) / 100) + pageblock_nr_pages;
+	if ((zone_managed_pages(zone) / 100) < pageblock_nr_pages)
+		return;
+	max_managed = ALIGN((zone_managed_pages(zone) / 100), pageblock_nr_pages);
 	if (zone->nr_reserved_highatomic >= max_managed)
 		return;
 
@@ -1941,7 +1941,7 @@ static bool unreserve_highatomic_pageblock(const struct alloc_context *ac,
 			continue;
 
 		spin_lock_irqsave(&zone->lock, flags);
-		for (order = 0; order <= MAX_ORDER; order++) {
+		for (order = 0; order < NR_PAGE_ORDERS; order++) {
 			struct free_area *area = &(zone->free_area[order]);
 
 			page = get_page_from_free_area(area, MIGRATE_HIGHATOMIC);
@@ -2025,7 +2025,7 @@ __rmqueue_fallback(struct zone *zone, int order, int start_migratetype,
 	 * approximates finding the pageblock with the most free pages, which
 	 * would be too costly to do exactly.
 	 */
-	for (current_order = MAX_ORDER; current_order >= min_order;
+	for (current_order = MAX_PAGE_ORDER; current_order >= min_order;
 				--current_order) {
 		area = &(zone->free_area[current_order]);
 		fallback_mt = find_suitable_fallback(area, current_order,
@@ -2051,8 +2051,7 @@ __rmqueue_fallback(struct zone *zone, int order, int start_migratetype,
 	return false;
 
 find_smallest:
-	for (current_order = order; current_order <= MAX_ORDER;
-							current_order++) {
+	for (current_order = order; current_order < NR_PAGE_ORDERS; current_order++) {
 		area = &(zone->free_area[current_order]);
 		fallback_mt = find_suitable_fallback(area, current_order,
 				start_migratetype, false, &can_steal);
@@ -2064,7 +2063,7 @@ find_smallest:
 	 * This should not happen - we already found a suitable fallback
 	 * when looking for the largest page.
 	 */
-	VM_BUG_ON(current_order > MAX_ORDER);
+	VM_BUG_ON(current_order > MAX_PAGE_ORDER);
 
 do_steal:
 	page = get_page_from_free_area(area, fallback_mt);
@@ -3007,7 +3006,7 @@ bool __zone_watermark_ok(struct zone *z, unsigned int order, unsigned long mark,
 		return true;
 
 	/* For a high-order request, check at least one suitable page is free */
-	for (o = order; o <= MAX_ORDER; o++) {
+	for (o = order; o < NR_PAGE_ORDERS; o++) {
 		struct free_area *area = &z->free_area[o];
 		int mt;
 
@@ -4543,7 +4542,7 @@ struct page *__alloc_pages(gfp_t gfp, unsigned int order, int preferred_nid,
 	 * There are several places where we assume that the order value is sane
 	 * so bail out early if the request is out of bound.
 	 */
-	if (WARN_ON_ONCE_GFP(order > MAX_ORDER, gfp))
+	if (WARN_ON_ONCE_GFP(order > MAX_PAGE_ORDER, gfp))
 		return NULL;
 
 	gfp &= gfp_allowed_mask;
@@ -4825,7 +4824,7 @@ static void *make_alloc_exact(unsigned long addr, unsigned int order,
  * minimum number of pages to satisfy the request.  alloc_pages() can only
  * allocate memory in power-of-two pages.
  *
- * This function is also limited by MAX_ORDER.
+ * This function is also limited by MAX_PAGE_ORDER.
  *
  * Memory allocated by this function must be released by free_pages_exact().
  *
@@ -6383,7 +6382,7 @@ int alloc_contig_range(unsigned long start, unsigned long end,
 	order = 0;
 	outer_start = start;
 	while (!PageBuddy(pfn_to_page(outer_start))) {
-		if (++order > MAX_ORDER) {
+		if (++order > MAX_PAGE_ORDER) {
 			outer_start = start;
 			break;
 		}
@@ -6637,7 +6636,7 @@ bool is_free_buddy_page(struct page *page)
 	unsigned long pfn = page_to_pfn(page);
 	unsigned int order;
 
-	for (order = 0; order <= MAX_ORDER; order++) {
+	for (order = 0; order < NR_PAGE_ORDERS; order++) {
 		struct page *page_head = page - (pfn & ((1 << order) - 1));
 
 		if (PageBuddy(page_head) &&
@@ -6645,7 +6644,7 @@ bool is_free_buddy_page(struct page *page)
 			break;
 	}
 
-	return order <= MAX_ORDER;
+	return order <= MAX_PAGE_ORDER;
 }
 EXPORT_SYMBOL(is_free_buddy_page);
 
@@ -6692,7 +6691,7 @@ bool take_page_off_buddy(struct page *page)
 	bool ret = false;
 
 	spin_lock_irqsave(&zone->lock, flags);
-	for (order = 0; order <= MAX_ORDER; order++) {
+	for (order = 0; order < NR_PAGE_ORDERS; order++) {
 		struct page *page_head = page - (pfn & ((1 << order) - 1));
 		int page_order = buddy_order(page_head);
 
@@ -6817,9 +6816,9 @@ static bool try_to_accept_memory_one(struct zone *zone)
 	__mod_zone_page_state(zone, NR_UNACCEPTED, -MAX_ORDER_NR_PAGES);
 	spin_unlock_irqrestore(&zone->lock, flags);
 
-	accept_page(page, MAX_ORDER);
+	accept_page(page, MAX_PAGE_ORDER);
 
-	__free_pages_ok(page, MAX_ORDER, FPI_TO_TAIL);
+	__free_pages_ok(page, MAX_PAGE_ORDER, FPI_TO_TAIL);
 
 	if (last)
 		static_branch_dec(&zones_with_unaccepted_pages);