This series amis to add hugetlb_free_vmemmap sysctl to enable the feature
of freeing vmemmap pages of HugeTLB pages.
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: disable freeing vmemmap pages when struct page crosses
page boundaries
mm: memory_hotplug: override memmap_on_memory when
hugetlb_free_vmemmap=on
sysctl: allow to set extra1 to SYSCTL_ONE
mm: hugetlb: add hugetlb_free_vmemmap sysctl
Documentation/admin-guide/sysctl/vm.rst | 14 ++++
include/linux/memory_hotplug.h | 9 +++
kernel/sysctl.c | 2 +-
mm/hugetlb_vmemmap.c | 113 +++++++++++++++++++++++++++-----
mm/hugetlb_vmemmap.h | 4 +-
mm/memory_hotplug.c | 27 ++++++--
6 files changed, 143 insertions(+), 26 deletions(-)
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2.11.0
