[0/4] Add support for fast mremap

Message

Joel Fernandes Oct. 13, 2018, 1:31 a.m. UTC

Hi,
Here is the latest "fast mremap" series. The main change in this submission is
to enable the fast mremap optimization on a per-architecture basis to prevent
possible issues with architectures that may not behave well with such change.

x86: select HAVE_MOVE_PMD for faster mremap (v1)

arm64: select HAVE_MOVE_PMD for faster mremap (v1)

mm: speed up mremap by 500x on large regions (v2)
v1->v2: Added support for per-arch enablement (Kirill Shutemov)

treewide: remove unused address argument from pte_alloc functions (v2)
v1->v2: fix arch/um/ prototype which was missed in v1 (Anton Ivanov)
        update changelog with manual fixups for m68k and microblaze.

Joel Fernandes (Google) (4):
  treewide: remove unused address argument from pte_alloc functions (v2)
  mm: speed up mremap by 500x on large regions (v2)
  arm64: select HAVE_MOVE_PMD for faster mremap (v1)
  x86: select HAVE_MOVE_PMD for faster mremap (v1)

 arch/Kconfig                                 |  5 ++
 arch/alpha/include/asm/pgalloc.h             |  6 +-
 arch/arc/include/asm/pgalloc.h               |  5 +-
 arch/arm/include/asm/pgalloc.h               |  4 +-
 arch/arm64/Kconfig                           |  1 +
 arch/arm64/include/asm/pgalloc.h             |  4 +-
 arch/hexagon/include/asm/pgalloc.h           |  6 +-
 arch/ia64/include/asm/pgalloc.h              |  5 +-
 arch/m68k/include/asm/mcf_pgalloc.h          |  8 +--
 arch/m68k/include/asm/motorola_pgalloc.h     |  4 +-
 arch/m68k/include/asm/sun3_pgalloc.h         |  6 +-
 arch/microblaze/include/asm/pgalloc.h        | 19 +-----
 arch/microblaze/mm/pgtable.c                 |  3 +-
 arch/mips/include/asm/pgalloc.h              |  6 +-
 arch/nds32/include/asm/pgalloc.h             |  5 +-
 arch/nios2/include/asm/pgalloc.h             |  6 +-
 arch/openrisc/include/asm/pgalloc.h          |  5 +-
 arch/openrisc/mm/ioremap.c                   |  3 +-
 arch/parisc/include/asm/pgalloc.h            |  4 +-
 arch/powerpc/include/asm/book3s/32/pgalloc.h |  4 +-
 arch/powerpc/include/asm/book3s/64/pgalloc.h | 12 ++--
 arch/powerpc/include/asm/nohash/32/pgalloc.h |  4 +-
 arch/powerpc/include/asm/nohash/64/pgalloc.h |  6 +-
 arch/powerpc/mm/pgtable-book3s64.c           |  2 +-
 arch/powerpc/mm/pgtable_32.c                 |  4 +-
 arch/riscv/include/asm/pgalloc.h             |  6 +-
 arch/s390/include/asm/pgalloc.h              |  4 +-
 arch/sh/include/asm/pgalloc.h                |  6 +-
 arch/sparc/include/asm/pgalloc_32.h          |  5 +-
 arch/sparc/include/asm/pgalloc_64.h          |  6 +-
 arch/sparc/mm/init_64.c                      |  6 +-
 arch/sparc/mm/srmmu.c                        |  4 +-
 arch/um/include/asm/pgalloc.h                |  4 +-
 arch/um/kernel/mem.c                         |  4 +-
 arch/unicore32/include/asm/pgalloc.h         |  4 +-
 arch/x86/Kconfig                             |  1 +
 arch/x86/include/asm/pgalloc.h               |  4 +-
 arch/x86/mm/pgtable.c                        |  4 +-
 arch/xtensa/include/asm/pgalloc.h            |  8 +--
 include/linux/mm.h                           | 13 ++--
 mm/huge_memory.c                             |  8 +--
 mm/kasan/kasan_init.c                        |  2 +-
 mm/memory.c                                  | 17 +++--
 mm/migrate.c                                 |  2 +-
 mm/mremap.c                                  | 67 +++++++++++++++++++-
 mm/userfaultfd.c                             |  2 +-
 virt/kvm/arm/mmu.c                           |  2 +-
 47 files changed, 169 insertions(+), 147 deletions(-)