Messages in this thread | | | Date | Fri, 27 Jul 2012 19:35:41 +0900 | From | Yasuaki Ishimatsu <> | Subject | Re: [RFC PATCH v5 00/19] memory-hotplug: hot-remove physical memory |
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Hi Wen,
2012/07/27 19:20, Wen Congyang wrote: > This patch series aims to support physical memory hot-remove. > > The patches can free/remove 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. > > change log of v5: > * merge the patchset to clear page table and the patchset to hot remove > memory(from ishimatsu) to one big patchset.
Thank you for merging patches. I'll review next Monday.
Thanks, Yasuaki Ishimatsu
> [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 (5): > 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() > > Yasuaki Ishimatsu (14): > 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 > memory-hotplug: remove sysfs file of node > > arch/ia64/mm/init.c | 16 + > arch/powerpc/mm/mem.c | 14 + > arch/powerpc/platforms/pseries/hotplug-memory.c | 16 +- > arch/s390/mm/init.c | 8 + > arch/sh/mm/init.c | 15 + > 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 | 333 ++++++++++++++++++++++ > arch/x86/mm/pageattr.c | 47 ++-- > drivers/acpi/acpi_memhotplug.c | 51 +++- > drivers/acpi/scan.c | 3 +- > drivers/base/memory.c | 90 ++++++- > drivers/base/node.c | 8 + > 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 | 337 +++++++++++++++++++++-- > mm/sparse.c | 5 +- > 23 files changed, 1010 insertions(+), 91 deletions(-) >
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