+ shmem-convert-shmem_alloc_hugepage-to-use-vma_alloc_folio.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: shmem: convert shmem_alloc_hugepage() to use vma_alloc_folio()
has been added to the -mm mm-unstable branch.  Its filename is
     shmem-convert-shmem_alloc_hugepage-to-use-vma_alloc_folio.patch

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

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------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: shmem: convert shmem_alloc_hugepage() to use vma_alloc_folio()

Patch series "Folio patches for 5.19".

 - Finish the conversion from alloc_pages_vma() to vma_alloc_folio()
 - Finish converting shrink_page_list() to folios
 - Start converting shmem from pages to folios (alas, not finished,
   I have simply run out of time with all the debugging/fixing needed
   for 5.18)


This patch (of 21):

For now, return the head page of the folio, but remove use of the old
alloc_pages_vma() API.

Link: https://lkml.kernel.org/r/20220429192329.3034378-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20220429192329.3034378-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/shmem.c |   10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

--- a/mm/shmem.c~shmem-convert-shmem_alloc_hugepage-to-use-vma_alloc_folio
+++ a/mm/shmem.c
@@ -1528,7 +1528,7 @@ static struct page *shmem_alloc_hugepage
 	struct vm_area_struct pvma;
 	struct address_space *mapping = info->vfs_inode.i_mapping;
 	pgoff_t hindex;
-	struct page *page;
+	struct folio *folio;
 
 	hindex = round_down(index, HPAGE_PMD_NR);
 	if (xa_find(&mapping->i_pages, &hindex, hindex + HPAGE_PMD_NR - 1,
@@ -1536,13 +1536,11 @@ static struct page *shmem_alloc_hugepage
 		return NULL;
 
 	shmem_pseudo_vma_init(&pvma, info, hindex);
-	page = alloc_pages_vma(gfp, HPAGE_PMD_ORDER, &pvma, 0, true);
+	folio = vma_alloc_folio(gfp, HPAGE_PMD_ORDER, &pvma, 0, true);
 	shmem_pseudo_vma_destroy(&pvma);
-	if (page)
-		prep_transhuge_page(page);
-	else
+	if (!folio)
 		count_vm_event(THP_FILE_FALLBACK);
-	return page;
+	return &folio->page;
 }
 
 static struct page *shmem_alloc_page(gfp_t gfp,
_

Patches currently in -mm which might be from willy@infradead.org are

shmem-convert-shmem_alloc_hugepage-to-use-vma_alloc_folio.patch
mm-huge_memory-convert-do_huge_pmd_anonymous_page-to-use-vma_alloc_folio.patch
mm-remove-alloc_pages_vma.patch
vmscan-use-folio_mapped-in-shrink_page_list.patch
vmscan-convert-the-writeback-handling-in-shrink_page_list-to-folios.patch
swap-turn-get_swap_page-into-folio_alloc_swap.patch
swap-convert-add_to_swap-to-take-a-folio.patch
vmscan-convert-dirty-page-handling-to-folios.patch
vmscan-convert-page-buffer-handling-to-use-folios.patch
vmscan-convert-lazy-freeing-to-folios.patch
vmscan-move-initialisation-of-mapping-down.patch
vmscan-convert-the-activate_locked-portion-of-shrink_page_list-to-folios.patch
vmscan-remove-remaining-uses-of-page-in-shrink_page_list.patch
mm-shmem-use-a-folio-in-shmem_unused_huge_shrink.patch
mm-swap-add-folio_throttle_swaprate.patch
mm-shmem-convert-shmem_add_to_page_cache-to-take-a-folio.patch
mm-shmem-turn-shmem_should_replace_page-into-shmem_should_replace_folio.patch
mm-shmem-turn-shmem_alloc_page-into-shmem_alloc_folio.patch
mm-shmem-convert-shmem_alloc_and_acct_page-to-use-a-folio.patch
mm-shmem-convert-shmem_getpage_gfp-to-use-a-folio.patch
mm-shmem-convert-shmem_swapin_page-to-shmem_swapin_folio.patch
vmcore-convert-copy_oldmem_page-to-take-an-iov_iter.patch
vmcore-convert-__read_vmcore-to-use-an-iov_iter.patch
vmcore-convert-read_from_oldmem-to-take-an-iov_iter.patch