The patch titled
Subject: mm: task_mmu: use a folio in clear_refs_pte_range()
has been added to the -mm mm-unstable branch. Its filename is
mm-task_mmu-use-a-folio-in-clear_refs_pte_range.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-task_mmu-use-a-folio-in-clear_refs_pte_range.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: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Subject: mm: task_mmu: use a folio in clear_refs_pte_range()
Date: Fri, 10 Nov 2023 11:33:23 +0800
Use a folio to save two compound_head() calls in clear_refs_pte_range().
Link: https://lkml.kernel.org/r/20231110033324.2455523-7-wangkefeng.wang@xxxxxxxxxx
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Gregory Price <gregory.price@xxxxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
--- a/fs/proc/task_mmu.c~mm-task_mmu-use-a-folio-in-clear_refs_pte_range
+++ a/fs/proc/task_mmu.c
@@ -1161,7 +1161,7 @@ static int clear_refs_pte_range(pmd_t *p
struct vm_area_struct *vma = walk->vma;
pte_t *pte, ptent;
spinlock_t *ptl;
- struct page *page;
+ struct folio *folio;
ptl = pmd_trans_huge_lock(pmd, vma);
if (ptl) {
@@ -1173,12 +1173,12 @@ static int clear_refs_pte_range(pmd_t *p
if (!pmd_present(*pmd))
goto out;
- page = pmd_page(*pmd);
+ folio = page_folio(pmd_page(*pmd));
/* Clear accessed and referenced bits. */
pmdp_test_and_clear_young(vma, addr, pmd);
- test_and_clear_page_young(page);
- ClearPageReferenced(page);
+ folio_test_clear_young(folio);
+ folio_clear_referenced(folio);
out:
spin_unlock(ptl);
return 0;
@@ -1200,14 +1200,14 @@ out:
if (!pte_present(ptent))
continue;
- page = vm_normal_page(vma, addr, ptent);
- if (!page)
+ folio = vm_normal_folio(vma, addr, ptent);
+ if (!folio)
continue;
/* Clear accessed and referenced bits. */
ptep_test_and_clear_young(vma, addr, pte);
- test_and_clear_page_young(page);
- ClearPageReferenced(page);
+ folio_test_clear_young(folio);
+ folio_clear_referenced(folio);
}
pte_unmap_unlock(pte - 1, ptl);
cond_resched();
_
Patches currently in -mm which might be from wangkefeng.wang@xxxxxxxxxx are
fs-proc-page-remove-unneeded-pagetail-pageslab-check.patch
fs-proc-page-use-a-folio-in-stable_page_flags.patch
fs-proc-page-respect-folio-head-page-flag-placement.patch
mm-huge_memory-use-more-folio-api-in-__split_huge_page_tail.patch
mm-task_mmu-use-a-folio-in-smaps_account.patch
mm-task_mmu-use-a-folio-in-clear_refs_pte_range.patch
page_idle-kill-page-idle-and-young-wrapper.patch
