The patch titled
Subject: khugepaged: convert alloc_charge_hpage to alloc_charge_folio
has been added to the -mm mm-unstable branch. Its filename is
khugepaged-convert-alloc_charge_hpage-to-alloc_charge_folio.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/khugepaged-convert-alloc_charge_hpage-to-alloc_charge_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: khugepaged: convert alloc_charge_hpage to alloc_charge_folio
Date: Wed, 3 Apr 2024 18:18:31 +0100
Both callers want to deal with a folio, so return a folio from this
function.
Link: https://lkml.kernel.org/r/20240403171838.1445826-3-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/khugepaged.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
--- a/mm/khugepaged.c~khugepaged-convert-alloc_charge_hpage-to-alloc_charge_folio
+++ a/mm/khugepaged.c
@@ -1045,7 +1045,7 @@ out:
return result;
}
-static int alloc_charge_hpage(struct page **hpage, struct mm_struct *mm,
+static int alloc_charge_folio(struct folio **foliop, struct mm_struct *mm,
struct collapse_control *cc)
{
gfp_t gfp = (cc->is_khugepaged ? alloc_hugepage_khugepaged_gfpmask() :
@@ -1055,7 +1055,7 @@ static int alloc_charge_hpage(struct pag
folio = __folio_alloc(gfp, HPAGE_PMD_ORDER, node, &cc->alloc_nmask);
if (!folio) {
- *hpage = NULL;
+ *foliop = NULL;
count_vm_event(THP_COLLAPSE_ALLOC_FAILED);
return SCAN_ALLOC_HUGE_PAGE_FAIL;
}
@@ -1063,13 +1063,13 @@ static int alloc_charge_hpage(struct pag
count_vm_event(THP_COLLAPSE_ALLOC);
if (unlikely(mem_cgroup_charge(folio, mm, gfp))) {
folio_put(folio);
- *hpage = NULL;
+ *foliop = NULL;
return SCAN_CGROUP_CHARGE_FAIL;
}
count_memcg_folio_events(folio, THP_COLLAPSE_ALLOC, 1);
- *hpage = folio_page(folio, 0);
+ *foliop = folio;
return SCAN_SUCCEED;
}
@@ -1098,7 +1098,8 @@ static int collapse_huge_page(struct mm_
*/
mmap_read_unlock(mm);
- result = alloc_charge_hpage(&hpage, mm, cc);
+ result = alloc_charge_folio(&folio, mm, cc);
+ hpage = &folio->page;
if (result != SCAN_SUCCEED)
goto out_nolock;
@@ -1204,7 +1205,6 @@ static int collapse_huge_page(struct mm_
if (unlikely(result != SCAN_SUCCEED))
goto out_up_write;
- folio = page_folio(hpage);
/*
* The smp_wmb() inside __folio_mark_uptodate() ensures the
* copy_huge_page writes become visible before the set_pmd_at()
@@ -1789,7 +1789,7 @@ static int collapse_file(struct mm_struc
struct page *hpage;
struct page *page;
struct page *tmp;
- struct folio *folio;
+ struct folio *folio, *new_folio;
pgoff_t index = 0, end = start + HPAGE_PMD_NR;
LIST_HEAD(pagelist);
XA_STATE_ORDER(xas, &mapping->i_pages, start, HPAGE_PMD_ORDER);
@@ -1800,7 +1800,8 @@ static int collapse_file(struct mm_struc
VM_BUG_ON(!IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS) && !is_shmem);
VM_BUG_ON(start & (HPAGE_PMD_NR - 1));
- result = alloc_charge_hpage(&hpage, mm, cc);
+ result = alloc_charge_folio(&new_folio, mm, cc);
+ hpage = &new_folio->page;
if (result != SCAN_SUCCEED)
goto out;
_
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
mm-convert-arch_clear_hugepage_flags-to-take-a-folio-fix.patch
slub-remove-use-of-page-flags.patch
remove-references-to-page-flags-in-documentation.patch
proc-rewrite-stable_page_flags.patch
proc-rewrite-stable_page_flags-fix.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
mm-use-rwsem-assertion-macros-for-mmap_lock.patch
filemap-remove-__set_page_dirty.patch
mm-correct-page_mapped_in_vma-for-large-folios.patch
mm-remove-vma_address.patch
mm-rename-vma_pgoff_address-back-to-vma_address.patch
khugepaged-inline-hpage_collapse_alloc_folio.patch
khugepaged-convert-alloc_charge_hpage-to-alloc_charge_folio.patch
khugepaged-remove-hpage-from-collapse_huge_page.patch
khugepaged-pass-a-folio-to-__collapse_huge_page_copy.patch
khugepaged-remove-hpage-from-collapse_file.patch
khugepaged-use-a-folio-throughout-collapse_file.patch
khugepaged-use-a-folio-throughout-hpage_collapse_scan_file.patch
