The quilt patch titled
Subject: mm: add PageAnonNotKsm()
has been removed from the -mm tree. Its filename was
mm-add-pageanonnotksm.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: mm: add PageAnonNotKsm()
Date: Wed, 2 Oct 2024 16:25:30 +0100
Check that this anonymous page is really anonymous, not anonymous-or-KSM.
This optimises the debug check, but its real purpose is to remove the last
two users of PageKsm().
[willy@xxxxxxxxxxxxx: fix assertions]
Link: https://lkml.kernel.org/r/ZwApWPER7caIA_N3@xxxxxxxxxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/20241002152533.1350629-5-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Alex Shi <alexs@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/page-flags.h | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
--- a/include/linux/page-flags.h~mm-add-pageanonnotksm
+++ a/include/linux/page-flags.h
@@ -689,6 +689,13 @@ static __always_inline bool folio_test_a
return ((unsigned long)folio->mapping & PAGE_MAPPING_ANON) != 0;
}
+static __always_inline bool PageAnonNotKsm(const struct page *page)
+{
+ unsigned long flags = (unsigned long)page_folio(page)->mapping;
+
+ return (flags & PAGE_MAPPING_FLAGS) == PAGE_MAPPING_ANON;
+}
+
static __always_inline bool PageAnon(const struct page *page)
{
return folio_test_anon(page_folio(page));
@@ -1137,14 +1144,14 @@ static __always_inline int PageAnonExclu
static __always_inline void SetPageAnonExclusive(struct page *page)
{
- VM_BUG_ON_PGFLAGS(!PageAnon(page) || PageKsm(page), page);
+ VM_BUG_ON_PGFLAGS(!PageAnonNotKsm(page), page);
VM_BUG_ON_PGFLAGS(PageHuge(page) && !PageHead(page), page);
set_bit(PG_anon_exclusive, &PF_ANY(page, 1)->flags);
}
static __always_inline void ClearPageAnonExclusive(struct page *page)
{
- VM_BUG_ON_PGFLAGS(!PageAnon(page) || PageKsm(page), page);
+ VM_BUG_ON_PGFLAGS(!PageAnonNotKsm(page), page);
VM_BUG_ON_PGFLAGS(PageHuge(page) && !PageHead(page), page);
clear_bit(PG_anon_exclusive, &PF_ANY(page, 1)->flags);
}
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-convert-page_to_pgoff-to-page_pgoff.patch
mm-use-page_pgoff-in-more-places.patch
mm-renovate-page_address_in_vma.patch
mm-mass-constification-of-folio-page-pointers.patch
bootmem-stop-using-page-index.patch
mm-remove-references-to-page-index-in-huge_memoryc.patch
mm-use-page-private-instead-of-page-index-in-percpu.patch
nilfs2-remove-nilfs_writepage.patch
nilfs2-convert-nilfs_page_count_clean_buffers-to-take-a-folio.patch
nilfs2-convert-nilfs_recovery_copy_block-to-take-a-folio.patch
nilfs2-convert-metadata-aops-from-writepage-to-writepages.patch
