[RFC PATCH 00/23 V2] memory,numa: introduce MOVABLE-dedicated node and online_movable for hotplug

From: Lai Jiangshan
Date: Thu Aug 02 2012 - 02:00:41 EST


A) Introduction:

This patchset adds MOVABLE-dedicated node and online_movable for memory-management.

It is used for anti-fragmentation(hugepage, big-order allocation...),
hot-removal-of-memory(virtualization, power-conserve, move memory between systems
to make better utilities of memories).

B) changed from V1:

The original V1 patchset of MOVABLE-dedicated node is here:
http://comments.gmane.org/gmane.linux.kernel.mm/78122

The new V2 adds N_MEMORY and a notion of "MOVABLE-dedicated node".
And fix some related problems.

The orignal V1 patchset of "add online_movable" is here:
https://lkml.org/lkml/2012/7/4/145

The new V2 discards the MIGRATE_HOTREMOVE approach, and use a more straight
implementation(only 1 patch).

C) User Interface:

When users(big system manager) need config some node/memory as MOVABLE:
1 Use kernelcore_max_addr=XX when boot
2 Use movable_online hotplug action when running
We may introduce some more convenient interface, such as
movable_node=NODE_LIST boot option.

D) Patches

Patch1 introduce N_MEMORY
Patch2-13 use N_MEMORY instead N_HIGH_MEMORY.
The patches are separated by subsystem,
*these conversions was(must be) checked carefully*.
Patch13 also changes the node_states initialization
Patch14,15,17 Fix problems of the current code.(all related with hotplug)
Patch18 Add config to allow MOVABLE-dedicated node
Patch19-22 Add kernelcore_max_addr
Patch23 Add online_movable


Lai Jiangshan (19):
node_states: introduce N_MEMORY
cpuset: use N_MEMORY instead N_HIGH_MEMORY
procfs: use N_MEMORY instead N_HIGH_MEMORY
oom: use N_MEMORY instead N_HIGH_MEMORY
mm,migrate: use N_MEMORY instead N_HIGH_MEMORY
mempolicy: use N_MEMORY instead N_HIGH_MEMORY
memcontrol: use N_MEMORY instead N_HIGH_MEMORY
hugetlb: use N_MEMORY instead N_HIGH_MEMORY
vmstat: use N_MEMORY instead N_HIGH_MEMORY
kthread: use N_MEMORY instead N_HIGH_MEMORY
init: use N_MEMORY instead N_HIGH_MEMORY
vmscan: use N_MEMORY instead N_HIGH_MEMORY
page_alloc: use N_MEMORY instead N_HIGH_MEMORY and change the node_states initialization
slub, hotplug: ignore unrelated node's hot-adding and hot-removing
memory_hotplug: fix missing nodemask management
numa: add CONFIG_MOVABLE_NODE for movable-dedicated node
page_alloc.c: don't subtract unrelated memmap from zone's present pages
page_alloc: add kernelcore_max_addr
mm, memory-hotplug: add online_movable

Yasuaki Ishimatsu (4):
x86: get pg_data_t's memory from other node
x86: use memblock_set_current_limit() to set memblock.current_limit
memblock: limit memory address from memblock
memblock: compare current_limit with end variable at
memblock_find_in_range_node()

Documentation/cgroups/cpusets.txt | 2 +-
Documentation/kernel-parameters.txt | 9 +++
Documentation/memory-hotplug.txt | 16 ++++-
arch/x86/kernel/setup.c | 4 +-
arch/x86/mm/init_64.c | 4 +-
arch/x86/mm/numa.c | 8 ++-
drivers/base/memory.c | 19 +++--
drivers/base/node.c | 8 ++-
fs/proc/kcore.c | 2 +-
fs/proc/task_mmu.c | 4 +-
include/linux/cpuset.h | 2 +-
include/linux/memblock.h | 1 +
include/linux/memory_hotplug.h | 13 +++-
include/linux/nodemask.h | 5 ++
init/main.c | 2 +-
kernel/cpuset.c | 32 ++++----
kernel/kthread.c | 2 +-
mm/Kconfig | 8 ++
mm/hugetlb.c | 24 +++---
mm/memblock.c | 10 ++-
mm/memcontrol.c | 18 +++---
mm/memory_hotplug.c | 137 ++++++++++++++++++++++++++++++++---
mm/mempolicy.c | 12 ++--
mm/migrate.c | 2 +-
mm/oom_kill.c | 2 +-
mm/page_alloc.c | 96 +++++++++++++++----------
mm/page_cgroup.c | 2 +-
mm/slub.c | 6 ++
mm/vmscan.c | 4 +-
mm/vmstat.c | 4 +-
30 files changed, 335 insertions(+), 123 deletions(-)

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