[v2,0/7] page->index removals in mm

Message

Matthew Wilcox Oct. 5, 2024, 8:01 p.m. UTC

As part of shrinking struct page, we need to stop using page->index.
This patchset gets rid of most of the remaining references to page->index
in mm, as well as increasing the number of functions which take a
const folio/page pointer.  It shrinks the text segment of mm by a few
hundred bytes in my test config, probably mostly from removing calls to
compound_head() in page_to_pgoff().

v2:
 - Add the bootmem patch to the series
   https://lore.kernel.org/linux-mm/[e-mail]/
 - Expand the scope of the page_address_in_vma() patch
 - Fix the build error reported by [e-mail]

v1 here: https://lore.kernel.org/linux-mm/[e-mail]/

Matthew Wilcox (Oracle) (7):
  mm: Convert page_to_pgoff() to page_pgoff()
  mm: Use page_pgoff() in more places
  mm: Renovate page_address_in_vma()
  mm: Mass constification of folio/page pointers
  bootmem: Stop using page->index
  mm: Remove references to page->index in huge_memory.c
  mm: Use page->private instead of page->index in percpu

 arch/x86/mm/init_64.c        |  9 ++++----
 include/linux/bootmem_info.h | 25 +++++++++++++-------
 include/linux/ksm.h          |  7 +++---
 include/linux/mm.h           |  2 +-
 include/linux/pagemap.h      | 31 +++++++++++++------------
 include/linux/rmap.h         | 17 ++++++--------
 kernel/futex/core.c          |  2 +-
 mm/bootmem_info.c            | 11 +++++----
 mm/huge_memory.c             | 18 +++++++--------
 mm/internal.h                |  9 ++++----
 mm/ksm.c                     | 12 +++++-----
 mm/memory-failure.c          | 30 ++++++++++++------------
 mm/mempolicy.c               |  2 +-
 mm/page_vma_mapped.c         |  8 +++----
 mm/percpu.c                  |  4 ++--
 mm/rmap.c                    | 44 +++++++++++++++++++++++-------------
 mm/sparse.c                  |  8 +++----
 mm/util.c                    |  2 +-
 18 files changed, 133 insertions(+), 108 deletions(-)