+ mm-hugetlb-increase-use-of-folios-in-alloc_huge_page.patch added to mm-unstable branch

+ mm-hugetlb-increase-use-of-folios-in-alloc_huge_page.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/hugetlb: increase use of folios in alloc_huge_page()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-hugetlb-increase-use-of-folios-in-alloc_huge_page.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-hugetlb-increase-use-of-folios-in-alloc_huge_page.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Subject: mm/hugetlb: increase use of folios in alloc_huge_page()
Date: Fri, 13 Jan 2023 16:30:54 -0600

Change hugetlb_cgroup_commit_charge{,_rsvd}(), dequeue_huge_page_vma() and
alloc_buddy_huge_page_with_mpol() to use folios so alloc_huge_page() is
cleaned by operating on folios until its return.

Link: https://lkml.kernel.org/r/20230113223057.173292-6-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/include/linux/hugetlb_cgroup.h~mm-hugetlb-increase-use-of-folios-in-alloc_huge_page
+++ a/include/linux/hugetlb_cgroup.h
@@ -141,10 +141,10 @@ extern int hugetlb_cgroup_charge_cgroup_
 					     struct hugetlb_cgroup **ptr);
 extern void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
 					 struct hugetlb_cgroup *h_cg,
-					 struct page *page);
+					 struct folio *folio);
 extern void hugetlb_cgroup_commit_charge_rsvd(int idx, unsigned long nr_pages,
 					      struct hugetlb_cgroup *h_cg,
-					      struct page *page);
+					      struct folio *folio);
 extern void hugetlb_cgroup_uncharge_folio(int idx, unsigned long nr_pages,
 					 struct folio *folio);
 extern void hugetlb_cgroup_uncharge_folio_rsvd(int idx, unsigned long nr_pages,
@@ -230,14 +230,14 @@ static inline int hugetlb_cgroup_charge_
 
 static inline void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
 						struct hugetlb_cgroup *h_cg,
-						struct page *page)
+						struct folio *folio)
 {
 }
 
 static inline void
 hugetlb_cgroup_commit_charge_rsvd(int idx, unsigned long nr_pages,
 				  struct hugetlb_cgroup *h_cg,
-				  struct page *page)
+				  struct folio *folio)
 {
 }
 
--- a/mm/hugetlb.c~mm-hugetlb-increase-use-of-folios-in-alloc_huge_page
+++ a/mm/hugetlb.c
@@ -1348,7 +1348,7 @@ static unsigned long available_huge_page
 	return h->free_huge_pages - h->resv_huge_pages;
 }
 
-static struct page *dequeue_huge_page_vma(struct hstate *h,
+static struct folio *dequeue_hugetlb_folio_vma(struct hstate *h,
 				struct vm_area_struct *vma,
 				unsigned long address, int avoid_reserve,
 				long chg)
@@ -1392,7 +1392,7 @@ static struct page *dequeue_huge_page_vm
 	}
 
 	mpol_cond_put(mpol);
-	return &folio->page;
+	return folio;
 
 err:
 	return NULL;
@@ -2446,7 +2446,7 @@ static struct page *alloc_migrate_huge_p
  * Use the VMA's mpolicy to allocate a huge page from the buddy.
  */
 static
-struct page *alloc_buddy_huge_page_with_mpol(struct hstate *h,
+struct folio *alloc_buddy_hugetlb_folio_with_mpol(struct hstate *h,
 		struct vm_area_struct *vma, unsigned long addr)
 {
 	struct folio *folio = NULL;
@@ -2469,7 +2469,7 @@ struct page *alloc_buddy_huge_page_with_
 	if (!folio)
 		folio = alloc_surplus_hugetlb_folio(h, gfp_mask, nid, nodemask);
 	mpol_cond_put(mpol);
-	return &folio->page;
+	return folio;
 }
 
 /* page migration callback function */
@@ -3018,7 +3018,6 @@ struct page *alloc_huge_page(struct vm_a
 {
 	struct hugepage_subpool *spool = subpool_vma(vma);
 	struct hstate *h = hstate_vma(vma);
-	struct page *page;
 	struct folio *folio;
 	long map_chg, map_commit;
 	long gbl_chg;
@@ -3082,34 +3081,34 @@ struct page *alloc_huge_page(struct vm_a
 	 * from the global free pool (global change).  gbl_chg == 0 indicates
 	 * a reservation exists for the allocation.
 	 */
-	page = dequeue_huge_page_vma(h, vma, addr, avoid_reserve, gbl_chg);
-	if (!page) {
+	folio = dequeue_hugetlb_folio_vma(h, vma, addr, avoid_reserve, gbl_chg);
+	if (!folio) {
 		spin_unlock_irq(&hugetlb_lock);
-		page = alloc_buddy_huge_page_with_mpol(h, vma, addr);
-		if (!page)
+		folio = alloc_buddy_hugetlb_folio_with_mpol(h, vma, addr);
+		if (!folio)
 			goto out_uncharge_cgroup;
 		spin_lock_irq(&hugetlb_lock);
 		if (!avoid_reserve && vma_has_reserves(vma, gbl_chg)) {
-			SetHPageRestoreReserve(page);
+			folio_set_hugetlb_restore_reserve(folio);
 			h->resv_huge_pages--;
 		}
-		list_add(&page->lru, &h->hugepage_activelist);
-		set_page_refcounted(page);
+		list_add(&folio->lru, &h->hugepage_activelist);
+		folio_ref_unfreeze(folio, 1);
 		/* Fall through */
 	}
-	folio = page_folio(page);
-	hugetlb_cgroup_commit_charge(idx, pages_per_huge_page(h), h_cg, page);
+
+	hugetlb_cgroup_commit_charge(idx, pages_per_huge_page(h), h_cg, folio);
 	/* If allocation is not consuming a reservation, also store the
 	 * hugetlb_cgroup pointer on the page.
 	 */
 	if (deferred_reserve) {
 		hugetlb_cgroup_commit_charge_rsvd(idx, pages_per_huge_page(h),
-						  h_cg, page);
+						  h_cg, folio);
 	}
 
 	spin_unlock_irq(&hugetlb_lock);
 
-	hugetlb_set_page_subpool(page, spool);
+	hugetlb_set_folio_subpool(folio, spool);
 
 	map_commit = vma_commit_reservation(h, vma, addr);
 	if (unlikely(map_chg > map_commit)) {
@@ -3130,7 +3129,7 @@ struct page *alloc_huge_page(struct vm_a
 			hugetlb_cgroup_uncharge_folio_rsvd(hstate_index(h),
 					pages_per_huge_page(h), folio);
 	}
-	return page;
+	return &folio->page;
 
 out_uncharge_cgroup:
 	hugetlb_cgroup_uncharge_cgroup(idx, pages_per_huge_page(h), h_cg);
--- a/mm/hugetlb_cgroup.c~mm-hugetlb-increase-use-of-folios-in-alloc_huge_page
+++ a/mm/hugetlb_cgroup.c
@@ -331,19 +331,15 @@ static void __hugetlb_cgroup_commit_char
 
 void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
 				  struct hugetlb_cgroup *h_cg,
-				  struct page *page)
+				  struct folio *folio)
 {
-	struct folio *folio = page_folio(page);
-
 	__hugetlb_cgroup_commit_charge(idx, nr_pages, h_cg, folio, false);
 }
 
 void hugetlb_cgroup_commit_charge_rsvd(int idx, unsigned long nr_pages,
 				       struct hugetlb_cgroup *h_cg,
-				       struct page *page)
+				       struct folio *folio)
 {
-	struct folio *folio = page_folio(page);
-
 	__hugetlb_cgroup_commit_charge(idx, nr_pages, h_cg, folio, true);
 }
 
_

Patches currently in -mm which might be from sidhartha.kumar@oracle.com are

mm-move-folio_set_compound_order-to-mm-internalh.patch
mm-introduce-folio_is_pfmemalloc.patch
mm-remove-the-hugetlb-field-from-struct-page.patch
mm-memory-failure-convert-__get_huge_page_for_hwpoison-to-folios.patch
mm-memory-failure-convert-try_memory_failure_hugetlb-to-folios.patch
mm-memory-failure-convert-hugetlb_clear_page_hwpoison-to-folios.patch
mm-memory-failure-convert-free_raw_hwp_pages-to-folios.patch
mm-memory-failure-convert-raw_hwp_list_head-to-folios.patch
mm-memory-failure-convert-__free_raw_hwp_pages-to-folios.patch
mm-memory-failure-convert-hugetlb_set_page_hwpoison-to-folios.patch
mm-memory-failure-convert-unpoison_memory-to-folios.patch
mm-hugetlb-convert-isolate_hugetlb-to-folios.patch
mm-hugetlb-convert-__update_and_free_page-to-folios.patch
mm-hugetlb-convert-dequeue_hugetlb_page-functions-to-folios.patch
mm-hugetlb-convert-alloc_surplus_huge_page-to-folios.patch
mm-hugetlb-increase-use-of-folios-in-alloc_huge_page.patch
mm-hugetlb-convert-alloc_migrate_huge_page-to-folios.patch
mm-hugetlb-convert-restore_reserve_on_error-to-folios.patch
mm-hugetlb-convert-demote_free_huge_page-to-folios.patch