The patch titled
Subject: mm: migrate: drop redundant anonymous statistics for file folios migration
has been added to the -mm mm-unstable branch. Its filename is
mm-migrate-drop-redundant-anonymous-statistics-for-file-folios-migration.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-migrate-drop-redundant-anonymous-statistics-for-file-folios-migration.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: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Subject: mm: migrate: drop redundant anonymous statistics for file folios migration
Date: Thu, 5 Dec 2024 11:53:48 +0800
Commit 5d65c8d758f2 ("mm: count the number of anonymous THPs per size")
adds a new anonymous counter per THP size, however, when folio_mapping()
is not NULL during folio migration, it means this is not an anonymous
folio, so remove the redundant anonymous statistics in this case.
Link: https://lkml.kernel.org/r/d5e191ae02c2ab63c70cdf44877fe14fc69f5ae8.1733368611.git.baolin.wang@xxxxxxxxxxxxxxxxx
Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Zi Yan <ziy@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/migrate.c | 2 --
1 file changed, 2 deletions(-)
--- a/mm/migrate.c~mm-migrate-drop-redundant-anonymous-statistics-for-file-folios-migration
+++ a/mm/migrate.c
@@ -523,8 +523,6 @@ static int __folio_migrate_mapping(struc
*/
newfolio->index = folio->index;
newfolio->mapping = folio->mapping;
- if (folio_test_anon(folio) && folio_test_large(folio))
- mod_mthp_stat(folio_order(folio), MTHP_STAT_NR_ANON, 1);
folio_ref_add(newfolio, nr); /* add cache reference */
if (folio_test_swapbacked(folio)) {
__folio_set_swapbacked(newfolio);
_
Patches currently in -mm which might be from baolin.wang@xxxxxxxxxxxxxxxxx are
mm-factor-out-the-order-calculation-into-a-new-helper.patch
mm-shmem-change-shmem_huge_global_enabled-to-return-huge-order-bitmap.patch
mm-shmem-add-large-folio-support-for-tmpfs.patch
mm-shmem-add-a-kernel-command-line-to-change-the-default-huge-policy-for-tmpfs.patch
docs-tmpfs-drop-fadvise-from-the-documentation.patch
mm-migrate-drop-redundant-anonymous-statistics-for-file-folios-migration.patch
