[v2,0/5] Do not touch pages in hot-remove path

Message

Oscar Salvador Nov. 27, 2018, 4:20 p.m. UTC

From: Oscar Salvador <[e-mail]>

This patchset is based on Dan's HMM/devm refactorization [1].

----

This patchset aims for two things:

 1) A better definition about offline and hot-remove stage
 2) Solving bugs where we can access non-initialized pages
    during hot-remove operations [2] [3].

This is achieved by moving all page/zone handling to the offline
stage, so we do not need to access pages when hot-removing memory.

[1] https://patchwork.kernel.org/cover/10691415/
[2] https://patchwork.kernel.org/patch/10547445/
[3] https://www.spinics.net/lists/linux-mm/msg161316.html

Oscar Salvador (5):
  mm, memory_hotplug: Add nid parameter to arch_remove_memory
  kernel, resource: Check for IORESOURCE_SYSRAM in
    release_mem_region_adjustable
  mm, memory_hotplug: Move zone/pages handling to offline stage
  mm, memory-hotplug: Rework unregister_mem_sect_under_nodes
  mm, memory_hotplug: Refactor shrink_zone/pgdat_span

 arch/ia64/mm/init.c            |   2 +-
 arch/powerpc/mm/mem.c          |  14 +--
 arch/s390/mm/init.c            |   2 +-
 arch/sh/mm/init.c              |   6 +-
 arch/x86/mm/init_32.c          |   5 +-
 arch/x86/mm/init_64.c          |  11 +-
 drivers/base/memory.c          |   9 +-
 drivers/base/node.c            |  39 +------
 include/linux/memory.h         |   2 +-
 include/linux/memory_hotplug.h |  12 +-
 include/linux/node.h           |   9 +-
 kernel/memremap.c              |  19 ++-
 kernel/resource.c              |  15 +++
 mm/memory_hotplug.c            | 254 +++++++++++++++++++----------------------
 mm/sparse.c                    |   4 +-
 15 files changed, 182 insertions(+), 221 deletions(-)