This patch series aims to support physical memory hot-remove.
[RFC PATCH 1/12] memory-hotplug : rename remove_memory to offline_memory
[RFC PATCH 2/12] memory-hogplug : check memory offline in offline_pages
[RFC PATCH 3/12] memory-hotplug : add physical memory hotplug code to acpi_memory_device_remove
[RFC PATCH 4/12] memory-hotplug : remove /sys/firmware/memmap/X sysfs
[RFC PATCH 5/12] memory hotplug : does not release memory region in PAGES_PER_SECTION chunks
[RFC PATCH 6/12] memory-hotplug : remove_memory calls __remove_pages
[RFC PATCH 7/12] memory-hotplug : check page type in get_page_bootmem
[RFC PATCH 8/12] memory-hotplug : move register_page_bootmem_info_node and put_page_bootmem for
sparse-vmemmap
[RFC PATCH 9/12] memory-hotplug : implement register_page_bootmem_info_section of sparse-vmemmap
[RFC PATCH 10/12] memory-hotplug : free memmap of sparse-vmemmap
[RFC PATCH 11/12] memory-hotplug : add node_device_release
[RFC PATCH 12/12] memory-hotplug : remove sysfs file of node
Even if you apply these patches, you cannot remove the physical memory
completely since these patches are still under development. I want you to
cooperate to improve the physical memory hot-remove. So please review these
patches and give your comment/idea.
The patches can free/remove following things:
- acpi_memory_info : [RFC PATCH 3/12]
- /sys/firmware/memmap/X/{end, start, type} : [RFC PATCH 4/12]
- iomem_resource : [RFC PATCH 5/12]
- mem_section and related sysfs files : [RFC PATCH 6-10/12]
- node and related sysfs files : [RFC PATCH 11-12/12]
The patches cannot do following things yet:
- page table of removed memory
If you find lack of function for physical memory hot-remove, please let me
know.
---
arch/powerpc/platforms/pseries/hotplug-memory.c | 16 +-
arch/x86/mm/init_64.c | 142 ++++++++++++++++++++++++
drivers/acpi/acpi_memhotplug.c | 25 +++-
drivers/base/memory.c | 24 +++-
drivers/base/node.c | 7 +
drivers/firmware/memmap.c | 71 ++++++++++++
include/linux/firmware-map.h | 6 +
include/linux/memory.h | 1
include/linux/memory_hotplug.h | 17 --
include/linux/mm.h | 5
mm/memory_hotplug.c | 101 +++++++++++++----
mm/sparse.c | 5
12 files changed, 374 insertions(+), 46 deletions(-)
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