[PATCH 11/14] mm/ksm: pass folios to replace_page()
From: Longlong Xia <hidden>
Date: 2026-09-15 15:24:36
Also in:
lkml
Subsystem:
memory management, memory management - ksm (kernel samepage merging), the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
From: Longlong Xia <redacted> Pass the source and target folios directly to replace_page(). Any large source folio has already been split; KSM and zero-page targets are order-0. No functional change intended. Assisted-by: Zcode:GLM-5.3 Signed-off-by: Longlong Xia <redacted> --- mm/ksm.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/mm/ksm.c b/mm/ksm.c
index 8884964d5a53..4a4347e9ce39 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c@@ -1453,18 +1453,18 @@ static int write_protect_page(struct vm_area_struct *vma, struct folio *folio, /** * replace_page - replace page in vma by new ksm page * @vma: vma that holds the pte pointing to page - * @page: the page we are replacing by kpage - * @kpage: the ksm page we replace page by + * @folio: the folio we are replacing by kfolio + * @kfolio: the ksm folio we replace folio by * @orig_pte: the original value of the pte * * Returns 0 on success, -EFAULT on failure. */ -static int replace_page(struct vm_area_struct *vma, struct page *page, - struct page *kpage, pte_t orig_pte) +static int replace_page(struct vm_area_struct *vma, struct folio *folio, + struct folio *kfolio, pte_t orig_pte) { - struct folio *kfolio = page_folio(kpage); + struct page *page = folio_page(folio, 0); + struct page *kpage = folio_page(kfolio, 0); struct mm_struct *mm = vma->vm_mm; - struct folio *folio = page_folio(page); pmd_t *pmd; pmd_t pmde; pte_t *ptep;
@@ -1613,7 +1613,8 @@ static int try_to_merge_one_page(struct vm_area_struct *vma, folio_mark_dirty(folio); err = 0; } else if (pages_identical(page, kpage)) - err = replace_page(vma, page, kpage, orig_pte); + err = replace_page(vma, folio, page_folio(kpage), + orig_pte); } out_unlock:
--
2.43.0