The patch titled Subject: mm: memory: use a folio in validate_page_before_insert() has been added to the -mm mm-unstable branch. Its filename is mm-memory-use-a-folio-in-validate_page_before_insert.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memory-use-a-folio-in-validate_page_before_insert.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx> Subject: mm: memory: use a folio in validate_page_before_insert() Date: Sat, 18 Nov 2023 10:32:29 +0800 Use a folio in validate_page_before_insert() to save two compound_head() calls. Link: https://lkml.kernel.org/r/20231118023232.1409103-3-wangkefeng.wang@xxxxxxxxxx Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx> Reviewed-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx> Cc: David Hildenbrand <david@xxxxxxxxxx> Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Cc: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/memory.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- a/mm/memory.c~mm-memory-use-a-folio-in-validate_page_before_insert +++ a/mm/memory.c @@ -1842,9 +1842,12 @@ pte_t *__get_locked_pte(struct mm_struct static int validate_page_before_insert(struct page *page) { - if (PageAnon(page) || PageSlab(page) || page_has_type(page)) + struct folio *folio = page_folio(page); + + if (folio_test_anon(folio) || folio_test_slab(folio) || + page_has_type(page)) return -EINVAL; - flush_dcache_page(page); + flush_dcache_folio(folio); return 0; } _ Patches currently in -mm which might be from wangkefeng.wang@xxxxxxxxxx are mm-ksm-use-more-folio-api-in-ksm_might_need_to_copy.patch mm-memory-use-a-folio-in-validate_page_before_insert.patch mm-memory-rename-page_copy_prealloc-to-folio_prealloc.patch mm-memory-use-a-folio-in-do_cow_fault.patch mm-memory-use-folio_prealloc-in-wp_page_copy.patch