From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752655Ab2H1KDT (ORCPT ); Tue, 28 Aug 2012 06:03:19 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:56205 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752786Ab2H1KAF (ORCPT ); Tue, 28 Aug 2012 06:00:05 -0400 X-IronPort-AV: E=Sophos;i="4.77,841,1336320000"; d="scan'208";a="5739732" From: wency@cn.fujitsu.com To: x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-acpi@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-ia64@vger.kernel.org, cmetcalf@tilera.com, sparclinux@vger.kernel.org Cc: rientjes@google.com, liuj97@gmail.com, 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, isimatu.yasuaki@jp.fujitsu.com, Wen Congyang Subject: [RFC v8 PATCH 00/20] memory-hotplug: hot-remove physical memory Date: Tue, 28 Aug 2012 18:00:07 +0800 Message-Id: <1346148027-24468-1-git-send-email-wency@cn.fujitsu.com> X-Mailer: git-send-email 1.7.1 X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/08/28 17:55:06, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/08/28 17:55:17, Serialize complete at 2012/08/28 17:55:17 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wen Congyang This patch series aims to support physical memory hot-remove. The patches can free/remove the following things: - acpi_memory_info : [RFC PATCH 4/19] - /sys/firmware/memmap/X/{end, start, type} : [RFC PATCH 8/19] - iomem_resource : [RFC PATCH 9/19] - mem_section and related sysfs files : [RFC PATCH 10-11, 13-16/19] - page table of removed memory : [RFC PATCH 12/19] - node and related sysfs files : [RFC PATCH 18-19/19] If you find lack of function for physical memory hot-remove, please let me know. Known problems: 1. memory can't be offlined when CONFIG_MEMCG is selected. change log of v8: [RFC PATCH v8 17/20] * Fix problems when one node's range include the other nodes [RFC PATCH v8 18/20] * fix building error when CONFIG_MEMORY_HOTPLUG_SPARSE or CONFIG_HUGETLBFS is not defined. [RFC PATCH v8 19/20] * don't offline node when some memory sections are not removed [RFC PATCH v8 20/20] * create new patch: clear hwpoisoned flag when onlining pages change log of v7: [RFC PATCH v7 4/19] * do not continue if acpi_memory_device_remove_memory() fails. [RFC PATCH v7 15/19] * handle usemap in register_page_bootmem_info_section() too. change log of v6: [RFC PATCH v6 12/19] * fix building error on other archtitectures than x86 [RFC PATCH v6 15-16/19] * fix building error on other archtitectures than x86 change log of v5: * merge the patchset to clear page table and the patchset to hot remove memory(from ishimatsu) to one big patchset. [RFC PATCH v5 1/19] * rename remove_memory() to offline_memory()/offline_pages() [RFC PATCH v5 2/19] * new patch: implement offline_memory(). This function offlines pages, update memory block's state, and notify the userspace that the memory block's state is changed. [RFC PATCH v5 4/19] * offline and remove memory in acpi_memory_disable_device() too. [RFC PATCH v5 17/19] * new patch: add a new function __remove_zone() to revert the things done in the function __add_zone(). [RFC PATCH v5 18/19] * flush work befor reseting node device. change log of v4: * remove "memory-hotplug : unify argument of firmware_map_add_early/hotplug" from the patch series, since the patch is a bugfix. It is being disccussed on other thread. But for testing the patch series, the patch is needed. So I added the patch as [PATCH 0/13]. [RFC PATCH v4 2/13] * check memory is online or not at remove_memory() * add memory_add_physaddr_to_nid() to acpi_memory_device_remove() for getting node id [RFC PATCH v4 3/13] * create new patch : check memory is online or not at online_pages() [RFC PATCH v4 4/13] * add __ref section to remove_memory() * call firmware_map_remove_entry() before remove_sysfs_fw_map_entry() [RFC PATCH v4 11/13] * rewrite register_page_bootmem_memmap() for removing page used as PT/PMD change log of v3: * rebase to 3.5.0-rc6 [RFC PATCH v2 2/13] * remove extra kobject_put() * The patch was commented by Wen. Wen's comment is "acpi_memory_device_remove() should ignore a return value of remove_memory() since caller does not care the return value". But I did not change it since I think caller should care the return value. And I am trying to fix it as follow: https://lkml.org/lkml/2012/7/5/624 [RFC PATCH v2 4/13] * remove a firmware_memmap_entry allocated by kzmalloc() change log of v2: [RFC PATCH v2 2/13] * check whether memory block is offline or not before calling offline_memory() * check whether section is valid or not in is_memblk_offline() * call kobject_put() for each memory_block in is_memblk_offline() [RFC PATCH v2 3/13] * unify the end argument of firmware_map_add_early/hotplug [RFC PATCH v2 4/13] * add release_firmware_map_entry() for freeing firmware_map_entry [RFC PATCH v2 6/13] * add release_memory_block() for freeing memory_block [RFC PATCH v2 11/13] * fix wrong arguments of free_pages() Wen Congyang (7): memory-hotplug: implement offline_memory() memory-hotplug: store the node id in acpi_memory_device memory-hotplug: export the function acpi_bus_remove() memory-hotplug: call acpi_bus_remove() to remove memory device memory-hotplug: introduce new function arch_remove_memory() memory-hotplug: remove sysfs file of node memory-hotplug: clear hwpoisoned flag when onlining pages Yasuaki Ishimatsu (13): memory-hotplug: rename remove_memory() to offline_memory()/offline_pages() memory-hotplug: offline and remove memory when removing the memory device memory-hotplug: check whether memory is present or not memory-hotplug: remove /sys/firmware/memmap/X sysfs memory-hotplug: does not release memory region in PAGES_PER_SECTION chunks memory-hotplug: add memory_block_release memory-hotplug: remove_memory calls __remove_pages memory-hotplug: check page type in get_page_bootmem memory-hotplug: move register_page_bootmem_info_node and put_page_bootmem for sparse-vmemmap memory-hotplug: implement register_page_bootmem_info_section of sparse-vmemmap memory-hotplug: free memmap of sparse-vmemmap memory_hotplug: clear zone when the memory is removed memory-hotplug: add node_device_release arch/ia64/mm/discontig.c | 14 + arch/ia64/mm/init.c | 16 + arch/powerpc/mm/init_64.c | 14 + arch/powerpc/mm/mem.c | 14 + arch/powerpc/platforms/pseries/hotplug-memory.c | 16 +- arch/s390/mm/init.c | 12 + arch/s390/mm/vmem.c | 14 + arch/sh/mm/init.c | 15 + arch/sparc/mm/init_64.c | 14 + arch/tile/mm/init.c | 8 + arch/x86/include/asm/pgtable_types.h | 1 + arch/x86/mm/init_32.c | 10 + arch/x86/mm/init_64.c | 331 +++++++++++++++++++ arch/x86/mm/pageattr.c | 47 ++-- drivers/acpi/acpi_memhotplug.c | 54 +++- drivers/acpi/scan.c | 3 +- drivers/base/memory.c | 90 +++++- drivers/base/node.c | 11 + drivers/firmware/memmap.c | 78 +++++- include/acpi/acpi_bus.h | 1 + include/linux/firmware-map.h | 6 + include/linux/memory.h | 5 + include/linux/memory_hotplug.h | 25 +- include/linux/mm.h | 5 +- include/linux/mmzone.h | 19 + mm/memory_hotplug.c | 404 +++++++++++++++++++++-- mm/sparse.c | 5 +- 27 files changed, 1141 insertions(+), 91 deletions(-)