[PATCH v5 0/2] make hugetlb_optimize_vmemmap compatible with memmap_on_memory

[Muchun Song <songmuchun@bytedance.com>]

This series makes hugetlb_optimize_vmemmap compatible with memmap_on_memory
and is based on mm-stable.  The reason refers to the patch 2's commit log.

v5:
 - Replace enum to defines per David.
 - Walk vmemmap page tables to avoid false-positive.

v4:
 - Fix compiling error when CONFIG_MEMORY_HOTPLUG is disabled reported by kernel test robot.
 - Fix a bug when memory_block_size_bytes() is not equal to section size.

v3:
 - Switch complicated enumeration magic (David).
 - Introduce PageVmemmapSelfHosted to make both parameters compatible (David and Oscar).

v2:
 - Fix compile error when !CONFIG_ZONE_DEVICE reported by kernel test robot.

Muchun Song (2):
  mm: memory_hotplug: enumerate all supported section flags
  mm: memory_hotplug: make hugetlb_optimize_vmemmap compatible with
    memmap_on_memory

 Documentation/admin-guide/kernel-parameters.txt | 22 ++++-----
 Documentation/admin-guide/sysctl/vm.rst         |  5 +-
 include/linux/memory_hotplug.h                  |  9 ----
 include/linux/mmzone.h                          | 41 +++++++++++----
 include/linux/page-flags.h                      | 11 +++++
 mm/hugetlb_vmemmap.c                            | 66 ++++++++++++++++++++++---
 mm/memory_hotplug.c                             | 33 +++++++------
 mm/sparse.c                                     |  2 +-
 8 files changed, 132 insertions(+), 57 deletions(-)

-- 
2.11.0