The patch titled
Subject: mm: add pmd_folio()
has been added to the -mm mm-unstable branch. Its filename is
mm-add-pmd_folio.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-add-pmd_folio.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: mm: add pmd_folio()
Date: Tue, 26 Mar 2024 20:28:23 +0000
Convert directly from a pmd to a folio without going through another
representation first. For now this is just a slightly shorter way to
write it, but it might end up being more efficient later.
Link: https://lkml.kernel.org/r/20240326202833.523759-4-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/pgtable.h | 2 ++
mm/huge_memory.c | 6 +++---
mm/madvise.c | 2 +-
mm/mempolicy.c | 2 +-
mm/mlock.c | 2 +-
mm/userfaultfd.c | 2 +-
6 files changed, 9 insertions(+), 7 deletions(-)
--- a/include/linux/pgtable.h~mm-add-pmd_folio
+++ a/include/linux/pgtable.h
@@ -50,6 +50,8 @@
#define pmd_pgtable(pmd) pmd_page(pmd)
#endif
+#define pmd_folio(pmd) page_folio(pmd_page(pmd))
+
/*
* A page table page can be thought of an array like this: pXd_t[PTRS_PER_PxD]
*
--- a/mm/huge_memory.c~mm-add-pmd_folio
+++ a/mm/huge_memory.c
@@ -1816,7 +1816,7 @@ bool madvise_free_huge_pmd(struct mmu_ga
goto out;
}
- folio = pfn_folio(pmd_pfn(orig_pmd));
+ folio = pmd_folio(orig_pmd);
/*
* If other processes are mapping this folio, we couldn't discard
* the folio unless they all do MADV_FREE so let's skip the folio.
@@ -2086,7 +2086,7 @@ int change_huge_pmd(struct mmu_gather *t
if (pmd_protnone(*pmd))
goto unlock;
- folio = page_folio(pmd_page(*pmd));
+ folio = pmd_folio(*pmd);
toptier = node_is_toptier(folio_nid(folio));
/*
* Skip scanning top tier node if normal numa
@@ -2663,7 +2663,7 @@ void __split_huge_pmd(struct vm_area_str
* It's safe to call pmd_page when folio is set because it's
* guaranteed that pmd is present.
*/
- if (folio && folio != page_folio(pmd_page(*pmd)))
+ if (folio && folio != pmd_folio(*pmd))
goto out;
__split_huge_pmd_locked(vma, pmd, range.start, freeze);
}
--- a/mm/madvise.c~mm-add-pmd_folio
+++ a/mm/madvise.c
@@ -363,7 +363,7 @@ static int madvise_cold_or_pageout_pte_r
goto huge_unlock;
}
- folio = pfn_folio(pmd_pfn(orig_pmd));
+ folio = pmd_folio(orig_pmd);
/* Do not interfere with other mappings of this folio */
if (folio_likely_mapped_shared(folio))
--- a/mm/mempolicy.c~mm-add-pmd_folio
+++ a/mm/mempolicy.c
@@ -509,7 +509,7 @@ static void queue_folios_pmd(pmd_t *pmd,
qp->nr_failed++;
return;
}
- folio = pfn_folio(pmd_pfn(*pmd));
+ folio = pmd_folio(*pmd);
if (is_huge_zero_folio(folio)) {
walk->action = ACTION_CONTINUE;
return;
--- a/mm/mlock.c~mm-add-pmd_folio
+++ a/mm/mlock.c
@@ -378,7 +378,7 @@ static int mlock_pte_range(pmd_t *pmd, u
goto out;
if (is_huge_zero_pmd(*pmd))
goto out;
- folio = page_folio(pmd_page(*pmd));
+ folio = pmd_folio(*pmd);
if (vma->vm_flags & VM_LOCKED)
mlock_folio(folio);
else
--- a/mm/userfaultfd.c~mm-add-pmd_folio
+++ a/mm/userfaultfd.c
@@ -1697,7 +1697,7 @@ ssize_t move_pages(struct userfaultfd_ct
/* Check if we can move the pmd without splitting it. */
if (move_splits_huge_pmd(dst_addr, src_addr, src_start + len) ||
!pmd_none(dst_pmdval)) {
- struct folio *folio = pfn_folio(pmd_pfn(*src_pmd));
+ struct folio *folio = pmd_folio(*src_pmd);
if (!folio || (!is_huge_zero_folio(folio) &&
!PageAnonExclusive(&folio->page))) {
_
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
