[merged mm-stable] mm-page_owner-add-support-for-splitting-to-any-order-in-split-page_owner.patch removed from -mm tree

[merged mm-stable] mm-page_owner-add-support-for-splitting-to-any-order-in-split-page_owner.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: page_owner: add support for splitting to any order in split page_owner
has been removed from the -mm tree.  Its filename was
     mm-page_owner-add-support-for-splitting-to-any-order-in-split-page_owner.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Zi Yan <ziy@nvidia.com>
Subject: mm: page_owner: add support for splitting to any order in split page_owner
Date: Mon, 26 Feb 2024 15:55:32 -0500

It adds a new_order parameter to set new page order in page owner.  It
prepares for upcoming changes to support split huge page to any lower
order.

Link: https://lkml.kernel.org/r/20240226205534.1603748-7-zi.yan@sent.com
Signed-off-by: Zi Yan <ziy@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Michal Koutny <mkoutny@suse.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Yu Zhao <yuzhao@google.com>
Cc: Zach O'Keefe <zokeefe@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/page_owner.h |   13 ++++++++-----
 mm/huge_memory.c           |    2 +-
 mm/page_alloc.c            |    4 ++--
 mm/page_owner.c            |    7 +++----
 4 files changed, 14 insertions(+), 12 deletions(-)

--- a/include/linux/page_owner.h~mm-page_owner-add-support-for-splitting-to-any-order-in-split-page_owner
+++ a/include/linux/page_owner.h
@@ -11,7 +11,8 @@ extern struct page_ext_operations page_o
 extern void __reset_page_owner(struct page *page, unsigned short order);
 extern void __set_page_owner(struct page *page,
 			unsigned short order, gfp_t gfp_mask);
-extern void __split_page_owner(struct page *page, int order);
+extern void __split_page_owner(struct page *page, int old_order,
+			int new_order);
 extern void __folio_copy_owner(struct folio *newfolio, struct folio *old);
 extern void __set_page_owner_migrate_reason(struct page *page, int reason);
 extern void __dump_page_owner(const struct page *page);
@@ -31,10 +32,11 @@ static inline void set_page_owner(struct
 		__set_page_owner(page, order, gfp_mask);
 }
 
-static inline void split_page_owner(struct page *page, int order)
+static inline void split_page_owner(struct page *page, int old_order,
+			int new_order)
 {
 	if (static_branch_unlikely(&page_owner_inited))
-		__split_page_owner(page, order);
+		__split_page_owner(page, old_order, new_order);
 }
 static inline void folio_copy_owner(struct folio *newfolio, struct folio *old)
 {
@@ -56,10 +58,11 @@ static inline void reset_page_owner(stru
 {
 }
 static inline void set_page_owner(struct page *page,
-			unsigned int order, gfp_t gfp_mask)
+			unsigned short order, gfp_t gfp_mask)
 {
 }
-static inline void split_page_owner(struct page *page, int order)
+static inline void split_page_owner(struct page *page, int old_order,
+			int new_order)
 {
 }
 static inline void folio_copy_owner(struct folio *newfolio, struct folio *folio)
--- a/mm/huge_memory.c~mm-page_owner-add-support-for-splitting-to-any-order-in-split-page_owner
+++ a/mm/huge_memory.c
@@ -2933,7 +2933,7 @@ static void __split_huge_page(struct pag
 	unlock_page_lruvec(lruvec);
 	/* Caller disabled irqs, so they are still disabled here */
 
-	split_page_owner(head, order);
+	split_page_owner(head, order, 0);
 
 	/* See comment in __split_huge_page_tail() */
 	if (PageAnon(head)) {
--- a/mm/page_alloc.c~mm-page_owner-add-support-for-splitting-to-any-order-in-split-page_owner
+++ a/mm/page_alloc.c
@@ -2616,7 +2616,7 @@ void split_page(struct page *page, unsig
 
 	for (i = 1; i < (1 << order); i++)
 		set_page_refcounted(page + i);
-	split_page_owner(page, order);
+	split_page_owner(page, order, 0);
 	split_page_memcg(page, order, 0);
 }
 EXPORT_SYMBOL_GPL(split_page);
@@ -4801,7 +4801,7 @@ static void *make_alloc_exact(unsigned l
 		struct page *page = virt_to_page((void *)addr);
 		struct page *last = page + nr;
 
-		split_page_owner(page, order);
+		split_page_owner(page, order, 0);
 		split_page_memcg(page, order, 0);
 		while (page < --last)
 			set_page_refcounted(last);
--- a/mm/page_owner.c~mm-page_owner-add-support-for-splitting-to-any-order-in-split-page_owner
+++ a/mm/page_owner.c
@@ -306,19 +306,18 @@ void __set_page_owner_migrate_reason(str
 	page_ext_put(page_ext);
 }
 
-void __split_page_owner(struct page *page, int order)
+void __split_page_owner(struct page *page, int old_order, int new_order)
 {
 	int i;
 	struct page_ext *page_ext = page_ext_get(page);
 	struct page_owner *page_owner;
-	unsigned int nr = 1 << order;
 
 	if (unlikely(!page_ext))
 		return;
 
-	for (i = 0; i < nr; i++) {
+	for (i = 0; i < (1 << old_order); i++) {
 		page_owner = get_page_owner(page_ext);
-		page_owner->order = 0;
+		page_owner->order = new_order;
 		page_ext = page_ext_next(page_ext);
 	}
 	page_ext_put(page_ext);
_

Patches currently in -mm which might be from ziy@nvidia.com are