[PATCH 00/10] Enable HugeTLB page migration on POWER

[Anshuman Khandual]

This patch series enables HugeTLB page migration on POWER platform.
This series has some core VM changes (patch 1, 2, 3) and some powerpc
specific changes (patch 4, 5, 6, 7, 8, 9, 10). Comments, suggestions
and inputs are welcome.

Anshuman Khandual (10):
  mm/mmap: Replace SHM_HUGE_MASK with MAP_HUGE_MASK inside mmap_pgoff
  mm/hugetlb: Add PGD based implementation awareness
  mm/hugetlb: Protect follow_huge_(pud|pgd) functions from race
  powerpc/hugetlb: Add ABI defines for MAP_HUGE_16MB and MAP_HUGE_16GB
  powerpc/hugetlb: Split the function 'huge_pte_alloc'
  powerpc/hugetlb: Split the function 'huge_pte_offset'
  powerpc/hugetlb: Prepare arch functions for ARCH_WANT_GENERAL_HUGETLB
  powerpc/hugetlb: Selectively enable ARCH_WANT_GENERAL_HUGETLB
  powerpc/hugetlb: Selectively enable ARCH_ENABLE_HUGEPAGE_MIGRATION
  selfttest/powerpc: Add memory page migration tests

 arch/powerpc/Kconfig                               |   8 +
 arch/powerpc/include/asm/book3s/64/hash-64k.h      |  10 +
 arch/powerpc/include/uapi/asm/mman.h               |   3 +
 arch/powerpc/mm/hugetlbpage.c                      |  60 +++---
 include/linux/hugetlb.h                            |   3 +
 include/linux/mm.h                                 |  33 ++++
 mm/gup.c                                           |   6 +
 mm/hugetlb.c                                       |  75 +++++++-
 mm/mmap.c                                          |   2 +-
 tools/testing/selftests/powerpc/mm/Makefile        |  14 +-
 .../selftests/powerpc/mm/hugepage-migration.c      |  30 +++
 tools/testing/selftests/powerpc/mm/migration.h     | 205 +++++++++++++++++++++
 .../testing/selftests/powerpc/mm/page-migration.c  |  33 ++++
 tools/testing/selftests/powerpc/mm/run_mmtests     | 104 +++++++++++
 14 files changed, 552 insertions(+), 34 deletions(-)
 create mode 100644 tools/testing/selftests/powerpc/mm/hugepage-migration.c
 create mode 100644 tools/testing/selftests/powerpc/mm/migration.h
 create mode 100644 tools/testing/selftests/powerpc/mm/page-migration.c
 create mode 100755 tools/testing/selftests/powerpc/mm/run_mmtests

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2.1.0