The patch titled
Subject: sparc: use is_huge_zero_pmd()
has been added to the -mm mm-unstable branch. Its filename is
sparc-use-is_huge_zero_pmd.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/sparc-use-is_huge_zero_pmd.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: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: sparc: use is_huge_zero_pmd()
Date: Tue, 26 Mar 2024 20:28:21 +0000
Patch series "Convert huge_zero_page to huge_zero_folio".
Almost all the callers of is_huge_zero_page() already have a folio. And
they should -- is_huge_zero_page() will return false for tail pages, even
if they're tail pages of the huge zero page. That's confusing, and one of
the benefits of the folio conversion is to get rid of this confusion.
This patch (of 8):
There's no need to convert to a page, much less a folio. We can tell from
the pmd whether it is a huge zero page or not. Saves 60 bytes of text.
Link: https://lkml.kernel.org/r/20240326202833.523759-1-willy@xxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/20240326202833.523759-2-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/sparc/mm/tlb.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/arch/sparc/mm/tlb.c~sparc-use-is_huge_zero_pmd
+++ a/arch/sparc/mm/tlb.c
@@ -183,12 +183,12 @@ static void __set_pmd_acct(struct mm_str
* hugetlb_pte_count.
*/
if (pmd_val(pmd) & _PAGE_PMD_HUGE) {
- if (is_huge_zero_page(pmd_page(pmd)))
+ if (is_huge_zero_pmd(pmd))
mm->context.hugetlb_pte_count++;
else
mm->context.thp_pte_count++;
} else {
- if (is_huge_zero_page(pmd_page(orig)))
+ if (is_huge_zero_pmd(orig))
mm->context.hugetlb_pte_count--;
else
mm->context.thp_pte_count--;
@@ -259,7 +259,7 @@ pmd_t pmdp_invalidate(struct vm_area_str
* Sanity check pmd before doing the actual decrement.
*/
if ((pmd_val(entry) & _PAGE_PMD_HUGE) &&
- !is_huge_zero_page(pmd_page(entry)))
+ !is_huge_zero_pmd(entry))
(vma->vm_mm)->context.thp_pte_count--;
return old;
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-always-initialise-folio-_deferred_list.patch
mm-create-folio_flag_false-and-folio_type_ops-macros.patch
mm-remove-folio_prep_large_rmappable.patch
mm-support-page_mapcount-on-page_has_type-pages.patch
mm-turn-folio_test_hugetlb-into-a-pagetype.patch
mm-turn-folio_test_hugetlb-into-a-pagetype-fix.patch
mm-remove-a-call-to-compound_head-from-is_page_hwpoison.patch
mm-free-up-pg_slab.patch
mm-free-up-pg_slab-fix.patch
mm-improve-dumping-of-mapcount-and-page_type.patch
hugetlb-remove-mention-of-destructors.patch
sh-remove-use-of-pg_arch_1-on-individual-pages.patch
xtensa-remove-uses-of-pg_arch_1-on-individual-pages.patch
mm-make-page_ext_get-take-a-const-argument.patch
mm-make-folio_test_idle-and-folio_test_young-take-a-const-argument.patch
mm-make-is_free_buddy_page-take-a-const-argument.patch
mm-make-page_mapped-take-a-const-argument.patch
mm-convert-arch_clear_hugepage_flags-to-take-a-folio.patch
slub-remove-use-of-page-flags.patch
remove-references-to-page-flags-in-documentation.patch
proc-rewrite-stable_page_flags.patch
sparc-use-is_huge_zero_pmd.patch
mm-add-is_huge_zero_folio.patch
mm-add-pmd_folio.patch
mm-convert-migrate_vma_collect_pmd-to-use-a-folio.patch
mm-convert-huge_zero_page-to-huge_zero_folio.patch
mm-convert-do_huge_pmd_anonymous_page-to-huge_zero_folio.patch
dax-use-huge_zero_folio.patch
mm-rename-mm_put_huge_zero_page-to-mm_put_huge_zero_folio.patch
