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Subject[PATCH v6 0/5] Refactor free_area_init_core and add free_area_init_core_hotplug
From: Oscar Salvador <>


v5 -> v6:
- Added patch from Pavel that removes __paginginit
- Convert all __meminit(old __paginginit) to __init
for functions we do not need after initialization.
- Move definition of free_area_init_core_hotplug
to include/linux/memory_hotplug.h
- Add Acked-by from Michal Hocko

v4 -> v5:
- Remove __ref from hotadd_new_pgdat and placed it to
free_area_init_core_hotplug. (Suggested by Pavel)
- Since free_area_init_core_hotplug is now allowed to be in a different
section (__ref), remove the __paginginit.)
- Stylecode in free_area_init_core_hotplug (Suggested by Pavel)
- Replace s/@__paginginit/@__init for free_area_init_node/free_area_init_core
as these functions are now only called during early init.
- Add Reviewd-by from Pavel

v3 -> v4:
- Unify patch-5 and patch-4.
- Make free_area_init_core __init (Suggested by Michal).
- Make zone_init_internals __paginginit (Suggested by Pavel).
- Add Reviewed-by/Acked-by:

v2 -> v3:
- Think better about split free_area_init_core for
memhotplug/early init context (Suggested by Michal).

This patchset does the following things:

1) Clean up/refactor free_area_init_core/free_area_init_node
by moving the ifdefery out of the functions.
2) Move the pgdat/zone initialization in free_area_init_core to its
own function.
3) Introduce free_area_init_core_hotplug, a small subset of free_area_init_core,
which is only called from memhotlug code path.
In this way, we have:
4) Remove __paginginit and convert it to __meminit
5) Reconvert all __meminit to __init for functions we do not need after

After this, we have:

free_area_init_core: called during early initialization
free_area_init_core_hotplug: called whenever a new node is allocated/re-used (memhotplug path)

Oscar Salvador (3):
mm/page_alloc: Move ifdefery out of free_area_init_core
mm/page_alloc: Inline function to handle
mm/page_alloc: Introduce free_area_init_core_hotplug

Pavel Tatashin (2):
mm: access zone->node via zone_to_nid() and zone_set_nid()
mm: remove __paginginit

include/linux/memory_hotplug.h | 1 +
include/linux/mm.h | 11 +--
include/linux/mmzone.h | 26 +++++--
mm/internal.h | 12 ----
mm/memory_hotplug.c | 16 ++---
mm/mempolicy.c | 4 +-
mm/mm_init.c | 9 +--
mm/page_alloc.c | 151 +++++++++++++++++++++++++++++------------
8 files changed, 137 insertions(+), 93 deletions(-)


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