This series is based on next-20220310.
This series amis to add hugetlb_free_vmemmap sysctl to enable the feature
of freeing vmemmap pages of HugeTLB pages.
v4:
- Introduce STRUCT_PAGE_SIZE_IS_POWER_OF_2 inspired by Luis.
v3:
- Add pr_warn_once() (Mike).
- Handle the transition from enabling to disabling (Luis)
v2:
- Fix compilation when !CONFIG_MHP_MEMMAP_ON_MEMORY reported by kernel
test robot <lkp@xxxxxxxxx>.
- Move sysctl code from kernel/sysctl.c to mm/hugetlb_vmemmap.c.
Muchun Song (4):
mm: hugetlb_vmemmap: introduce STRUCT_PAGE_SIZE_IS_POWER_OF_2
mm: memory_hotplug: override memmap_on_memory when
hugetlb_free_vmemmap=on
sysctl: allow to set extra1 to SYSCTL_ONE
mm: hugetlb_vmemmap: add hugetlb_free_vmemmap sysctl
Documentation/admin-guide/sysctl/vm.rst | 14 +++++
Kbuild | 12 ++++
fs/Kconfig | 2 +-
include/linux/memory_hotplug.h | 9 +++
include/linux/mm_types.h | 2 +
kernel/sysctl.c | 2 +-
mm/Kconfig | 3 +
mm/hugetlb_vmemmap.c | 107 ++++++++++++++++++++++++--------
mm/hugetlb_vmemmap.h | 4 +-
mm/memory_hotplug.c | 27 ++++++--
mm/struct_page_size.c | 19 ++++++
scripts/check_struct_page_po2.sh | 11 ++++
12 files changed, 177 insertions(+), 35 deletions(-)
create mode 100644 mm/struct_page_size.c
create mode 100755 scripts/check_struct_page_po2.sh
--
2.11.0
