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From: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
To: <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
	<linuxppc-dev@lists.ozlabs.org>, <linux-acpi@vger.kernel.org>
Cc: len.brown@intel.com, wency@cn.fujitsu.com, paulus@samba.org,
	minchan.kim@gmail.com, kosaki.motohiro@jp.fujitsu.com,
	cl@linux.com, akpm@linux-foundation.org
Subject: [RFC PATCH 0/12] memory-hotplug : hot-remove physical memory
Date: Wed, 27 Jun 2012 14:39:20 +0900	[thread overview]
Message-ID: <4FEA9C88.1070800@jp.fujitsu.com> (raw)

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(-)

             reply	other threads:[~2012-06-27  5:50 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-27  5:39 Yasuaki Ishimatsu [this message]
2012-06-27  5:42 ` [RFC PATCH 1/12] memory-hotplug : rename remove_memory to offline_memory Yasuaki Ishimatsu
2012-06-27  6:10   ` David Rientjes
2012-06-27  7:14   ` Wen Congyang
2012-06-27  8:47     ` Wen Congyang
2012-06-28  3:01       ` Yasuaki Ishimatsu
2012-06-28  3:25         ` Wen Congyang
2012-06-28  4:50           ` Yasuaki Ishimatsu
2012-06-27  5:44 ` [RFC PATCH 2/12] memory-hogplug : check memory offline in offline_pages Yasuaki Ishimatsu
2012-06-27  6:16   ` David Rientjes
2012-06-28  7:01     ` Yasuaki Ishimatsu
2012-06-27  8:49   ` Wen Congyang
2012-06-28  5:06     ` Yasuaki Ishimatsu
2012-06-28  5:27       ` KOSAKI Motohiro
2012-06-28  6:01         ` Yasuaki Ishimatsu
2012-06-28  5:26   ` KOSAKI Motohiro
2012-06-28  6:51     ` Yasuaki Ishimatsu
2012-06-30 15:46   ` Jiang Liu
2012-07-02  2:53     ` Yasuaki Ishimatsu
2012-06-30 15:51   ` Jiang Liu
2012-07-02  2:56     ` Yasuaki Ishimatsu
2012-06-27  5:45 ` [RFC PATCH 3/12] memory-hotplug : add physical memory hotplug code to acpi_memory_device_remove Yasuaki Ishimatsu
2012-06-27  5:47 ` [RFC PATCH 4/12] memory-hotplug : remove /sys/firmware/memmap/X sysfs Yasuaki Ishimatsu
2012-06-28  6:32   ` Wen Congyang
2012-06-28  8:07     ` Yasuaki Ishimatsu
2012-06-28  8:38       ` Wen Congyang
2012-06-29  3:09         ` Yasuaki Ishimatsu
2012-06-27  5:48 ` [RFC PATCH 5/12] memory-hotplug : does not release memory region in PAGES_PER_SECTION chunks Yasuaki Ishimatsu
2012-06-27  5:52 ` [RFC PATCH 6/12] memory-hotplug : remove_memory calls __remove_pages Yasuaki Ishimatsu
2012-06-27  5:53 ` [RFC PATCH 7/12] memory-hotplug : check page type in get_page_bootmem Yasuaki Ishimatsu
2012-06-27  5:54 ` [RFC PATCH 8/12] memory-hotplug : move register_page_bootmem_info_node and put_page_bootmem for sparse-vmemmap Yasuaki Ishimatsu
2012-06-27  5:55 ` [RFC PATCH 9/12] memory-hotplug : implement register_page_bootmem_info_section of sparse-vmemmap Yasuaki Ishimatsu
2012-06-27  5:56 ` [RFC PATCH 10/12] memory-hotplug : free memmap " Yasuaki Ishimatsu
2012-06-30 15:58   ` Jiang Liu
2012-07-02  3:01     ` Yasuaki Ishimatsu
2012-06-27  5:57 ` [RFC PATCH 11/12] memory-hotplug : add node_device_release Yasuaki Ishimatsu
2012-06-27  5:59 ` [RFC PATCH 12/12] memory-hotplug : remove sysfs file of node Yasuaki Ishimatsu

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