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, 7 insertions, 5 deletions

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 1434e0608d5a..dcb6bb9cf731 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -478,12 +478,13 @@ static struct task_struct *task_early_kill(struct task_struct *tsk,
 static void collect_procs_anon(struct page *page, struct list_head *to_kill,
 				int force_early)
 {
+	struct folio *folio = page_folio(page);
 	struct vm_area_struct *vma;
 	struct task_struct *tsk;
 	struct anon_vma *av;
 	pgoff_t pgoff;
 
-	av = page_lock_anon_vma_read(page);
+	av = folio_lock_anon_vma_read(folio);
 	if (av == NULL)	/* Not actually mapped anymore */
 		return;
 
@@ -1347,6 +1348,7 @@ static int get_hwpoison_page(struct page *p, unsigned long flags)
 static bool hwpoison_user_mappings(struct page *p, unsigned long pfn,
 				  int flags, struct page *hpage)
 {
+	struct folio *folio = page_folio(hpage);
 	enum ttu_flags ttu = TTU_IGNORE_MLOCK | TTU_SYNC;
 	struct address_space *mapping;
 	LIST_HEAD(tokill);
@@ -1421,12 +1423,12 @@ static bool hwpoison_user_mappings(struct page *p, unsigned long pfn,
 		 */
 		mapping = hugetlb_page_mapping_lock_write(hpage);
 		if (mapping) {
-			try_to_unmap(hpage, ttu|TTU_RMAP_LOCKED);
+			try_to_unmap(folio, ttu|TTU_RMAP_LOCKED);
 			i_mmap_unlock_write(mapping);
 		} else
 			pr_info("Memory failure: %#lx: could not lock mapping for mapped huge page\n", pfn);
 	} else {
-		try_to_unmap(hpage, ttu);
+		try_to_unmap(folio, ttu);
 	}
 
 	unmap_success = !page_mapped(hpage);
@@ -2169,7 +2171,7 @@ static bool isolate_page(struct page *page, struct list_head *pagelist)
  */
 static int __soft_offline_page(struct page *page)
 {
-	int ret = 0;
+	long ret = 0;
 	unsigned long pfn = page_to_pfn(page);
 	struct page *hpage = compound_head(page);
 	char const *msg_page[] = {"page", "hugepage"};
@@ -2216,7 +2218,7 @@ static int __soft_offline_page(struct page *page)
 			if (!list_empty(&pagelist))
 				putback_movable_pages(&pagelist);
 
-			pr_info("soft offline: %#lx: %s migration failed %d, type %pGp\n",
+			pr_info("soft offline: %#lx: %s migration failed %ld, type %pGp\n",
 				pfn, msg_page[huge], ret, &page->flags);
 			if (ret > 0)
 				ret = -EBUSY;