From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx141.postini.com [74.125.245.141]) by kanga.kvack.org (Postfix) with SMTP id 67BB36B005A for ; Wed, 27 Jun 2012 01:39:59 -0400 (EDT) Received: from m1.gw.fujitsu.co.jp (unknown [10.0.50.71]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id 3F1AF3EE0C8 for ; Wed, 27 Jun 2012 14:39:57 +0900 (JST) Received: from smail (m1 [127.0.0.1]) by outgoing.m1.gw.fujitsu.co.jp (Postfix) with ESMTP id 213D645DE60 for ; Wed, 27 Jun 2012 14:39:57 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (s1.gw.fujitsu.co.jp [10.0.50.91]) by m1.gw.fujitsu.co.jp (Postfix) with ESMTP id 044F445DE59 for ; Wed, 27 Jun 2012 14:39:57 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id ECF241DB8043 for ; Wed, 27 Jun 2012 14:39:56 +0900 (JST) Received: from g01jpexchkw04.g01.fujitsu.local (g01jpexchkw04.g01.fujitsu.local [10.0.194.43]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id 980F61DB804D for ; Wed, 27 Jun 2012 14:39:56 +0900 (JST) Message-ID: <4FEA9C88.1070800@jp.fujitsu.com> Date: Wed, 27 Jun 2012 14:39:20 +0900 From: Yasuaki Ishimatsu MIME-Version: 1.0 Subject: [RFC PATCH 0/12] memory-hotplug : hot-remove physical memory Content-Type: text/plain; charset="ISO-2022-JP" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: 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, benh@kernel.crashing.org, paulus@samba.org, cl@linux.com, minchan.kim@gmail.com, akpm@linux-foundation.org, kosaki.motohiro@jp.fujitsu.com, wency@cn.fujitsu.com 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(-) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org