[0/3] add hugetlb_free_vmemmap sysctl

Message

Muchun Song Feb. 28, 2022, 7:10 a.m. UTC

This series amis to add hugetlb_free_vmemmap sysctl to enable the feature
of freeing vmemmap pages of HugeTLB pages.

Muchun Song (3):
  mm: hugetlb: disable freeing vmemmap pages when struct page crosses
    page boundaries
  sysctl: allow to set extra1 to SYSCTL_ONE
  mm: hugetlb: add hugetlb_free_vmemmap sysctl

 Documentation/admin-guide/sysctl/vm.rst | 13 +++++++++++++
 include/linux/hugetlb.h                 |  5 +++++
 include/linux/memory_hotplug.h          |  1 +
 kernel/sysctl.c                         | 13 ++++++++++++-
 mm/hugetlb_vmemmap.c                    | 24 +++++++++++++++++++++++-
 mm/hugetlb_vmemmap.h                    |  4 +++-
 mm/memory_hotplug.c                     |  2 +-
 7 files changed, 58 insertions(+), 4 deletions(-)