Merge tag 'folio-5.18c' of git://git.infradead.org/users/willy/pagecache

Pull folio updates from Matthew Wilcox:

 - Rewrite how munlock works to massively reduce the contention on
   i_mmap_rwsem (Hugh Dickins):

     https://lore.kernel.org/linux-mm/8e4356d-9622-a7f0-b2c-f116b5f2efea@google.com/

 - Sort out the page refcount mess for ZONE_DEVICE pages (Christoph
   Hellwig):

     https://lore.kernel.org/linux-mm/20220210072828.2930359-1-hch@lst.de/

 - Convert GUP to use folios and make pincount available for order-1
   pages. (Matthew Wilcox)

 - Convert a few more truncation functions to use folios (Matthew
   Wilcox)

 - Convert page_vma_mapped_walk to use PFNs instead of pages (Matthew
   Wilcox)

 - Convert rmap_walk to use folios (Matthew Wilcox)

 - Convert most of shrink_page_list() to use a folio (Matthew Wilcox)

 - Add support for creating large folios in readahead (Matthew Wilcox)

* tag 'folio-5.18c' of git://git.infradead.org/users/willy/pagecache: (114 commits)
  mm/damon: minor cleanup for damon_pa_young
  selftests/vm/transhuge-stress: Support file-backed PMD folios
  mm/filemap: Support VM_HUGEPAGE for file mappings
  mm/readahead: Switch to page_cache_ra_order
  mm/readahead: Align file mappings for non-DAX
  mm/readahead: Add large folio readahead
  mm: Support arbitrary THP sizes
  mm: Make large folios depend on THP
  mm: Fix READ_ONLY_THP warning
  mm/filemap: Allow large folios to be added to the page cache
  mm: Turn can_split_huge_page() into can_split_folio()
  mm/vmscan: Convert pageout() to take a folio
  mm/vmscan: Turn page_check_references() into folio_check_references()
  mm/vmscan: Account large folios correctly
  mm/vmscan: Optimise shrink_page_list for non-PMD-sized folios
  mm/vmscan: Free non-shmem folios without splitting them
  mm/rmap: Constify the rmap_walk_control argument
  mm/rmap: Convert rmap_walk() to take a folio
  mm: Turn page_anon_vma() into folio_anon_vma()
  mm/rmap: Turn page_lock_anon_vma_read() into folio_lock_anon_vma_read()
  ...

1 files changed, 15 insertions, 28 deletions

diff --git a/mm/memory.c b/mm/memory.c
index e0f3410fa70c..7c40850b7124 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -735,9 +735,6 @@ static void restore_exclusive_pte(struct vm_area_struct *vma,
 
 	set_pte_at(vma->vm_mm, address, ptep, pte);
 
-	if (vma->vm_flags & VM_LOCKED)
-		mlock_vma_page(page);
-
 	/*
 	 * No need to invalidate - it was non-present before. However
 	 * secondary CPUs may have mappings that need invalidating.
@@ -1389,7 +1386,7 @@ again:
 					mark_page_accessed(page);
 			}
 			rss[mm_counter(page)]--;
-			page_remove_rmap(page, false);
+			page_remove_rmap(page, vma, false);
 			if (unlikely(page_mapcount(page) < 0))
 				print_bad_pte(vma, addr, ptent, page);
 			if (unlikely(__tlb_remove_page(tlb, page))) {
@@ -1408,7 +1405,7 @@ again:
 				continue;
 			rss[mm_counter(page)]--;
 			if (is_device_private_entry(entry))
-				page_remove_rmap(page, false);
+				page_remove_rmap(page, vma, false);
 			put_page(page);
 		} else if (!non_swap_entry(entry)) {
 			/* Genuine swap entry, hence a private anon page */
@@ -1763,16 +1760,16 @@ static int validate_page_before_insert(struct page *page)
 	return 0;
 }
 
-static int insert_page_into_pte_locked(struct mm_struct *mm, pte_t *pte,
+static int insert_page_into_pte_locked(struct vm_area_struct *vma, pte_t *pte,
 			unsigned long addr, struct page *page, pgprot_t prot)
 {
 	if (!pte_none(*pte))
 		return -EBUSY;
 	/* Ok, finally just insert the thing.. */
 	get_page(page);
-	inc_mm_counter_fast(mm, mm_counter_file(page));
-	page_add_file_rmap(page, false);
-	set_pte_at(mm, addr, pte, mk_pte(page, prot));
+	inc_mm_counter_fast(vma->vm_mm, mm_counter_file(page));
+	page_add_file_rmap(page, vma, false);
+	set_pte_at(vma->vm_mm, addr, pte, mk_pte(page, prot));
 	return 0;
 }
 
@@ -1786,7 +1783,6 @@ static int insert_page_into_pte_locked(struct mm_struct *mm, pte_t *pte,
 static int insert_page(struct vm_area_struct *vma, unsigned long addr,
 			struct page *page, pgprot_t prot)
 {
-	struct mm_struct *mm = vma->vm_mm;
 	int retval;
 	pte_t *pte;
 	spinlock_t *ptl;
@@ -1795,17 +1791,17 @@ static int insert_page(struct vm_area_struct *vma, unsigned long addr,
 	if (retval)
 		goto out;
 	retval = -ENOMEM;
-	pte = get_locked_pte(mm, addr, &ptl);
+	pte = get_locked_pte(vma->vm_mm, addr, &ptl);
 	if (!pte)
 		goto out;
-	retval = insert_page_into_pte_locked(mm, pte, addr, page, prot);
+	retval = insert_page_into_pte_locked(vma, pte, addr, page, prot);
 	pte_unmap_unlock(pte, ptl);
 out:
 	return retval;
 }
 
 #ifdef pte_index
-static int insert_page_in_batch_locked(struct mm_struct *mm, pte_t *pte,
+static int insert_page_in_batch_locked(struct vm_area_struct *vma, pte_t *pte,
 			unsigned long addr, struct page *page, pgprot_t prot)
 {
 	int err;
@@ -1815,7 +1811,7 @@ static int insert_page_in_batch_locked(struct mm_struct *mm, pte_t *pte,
 	err = validate_page_before_insert(page);
 	if (err)
 		return err;
-	return insert_page_into_pte_locked(mm, pte, addr, page, prot);
+	return insert_page_into_pte_locked(vma, pte, addr, page, prot);
 }
 
 /* insert_pages() amortizes the cost of spinlock operations
@@ -1852,7 +1848,7 @@ more:
 
 		start_pte = pte_offset_map_lock(mm, pmd, addr, &pte_lock);
 		for (pte = start_pte; pte_idx < batch_size; ++pte, ++pte_idx) {
-			int err = insert_page_in_batch_locked(mm, pte,
+			int err = insert_page_in_batch_locked(vma, pte,
 				addr, pages[curr_page_idx], prot);
 			if (unlikely(err)) {
 				pte_unmap_unlock(start_pte, pte_lock);
@@ -3108,7 +3104,7 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
 			 * mapcount is visible. So transitively, TLBs to
 			 * old page will be flushed before it can be reused.
 			 */
-			page_remove_rmap(old_page, false);
+			page_remove_rmap(old_page, vma, false);
 		}
 
 		/* Free the old page.. */
@@ -3128,16 +3124,6 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
 	 */
 	mmu_notifier_invalidate_range_only_end(&range);
 	if (old_page) {
-		/*
-		 * Don't let another task, with possibly unlocked vma,
-		 * keep the mlocked page.
-		 */
-		if (page_copied && (vma->vm_flags & VM_LOCKED)) {
-			lock_page(old_page);	/* LRU manipulation */
-			if (PageMlocked(old_page))
-				munlock_vma_page(old_page);
-			unlock_page(old_page);
-		}
 		if (page_copied)
 			free_swap_cache(old_page);
 		put_page(old_page);
@@ -3958,7 +3944,8 @@ vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page)
 		entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma);
 
 	add_mm_counter(vma->vm_mm, mm_counter_file(page), HPAGE_PMD_NR);
-	page_add_file_rmap(page, true);
+	page_add_file_rmap(page, vma, true);
+
 	/*
 	 * deposit and withdraw with pmd lock held
 	 */
@@ -4007,7 +3994,7 @@ void do_set_pte(struct vm_fault *vmf, struct page *page, unsigned long addr)
 		lru_cache_add_inactive_or_unevictable(page, vma);
 	} else {
 		inc_mm_counter_fast(vma->vm_mm, mm_counter_file(page));
-		page_add_file_rmap(page, false);
+		page_add_file_rmap(page, vma, false);
 	}
 	set_pte_at(vma->vm_mm, addr, vmf->pte, entry);
 }