The patch titled Subject: memory-hotplug: export the function try_offline_node() has been added to the -mm tree. Its filename is memory-hotplug-export-the-function-try_offline_node.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Wen Congyang <wency@xxxxxxxxxxxxxx> Subject: memory-hotplug: export the function try_offline_node() try_offline_node() will be needed in the tristate drivers/acpi/processor_driver.c. The node will be offlined when all memory/cpu on the node have been hotremoved. So we need the function try_offline_node() in cpu-hotplug path. If the memory-hotplug is disabled, and cpu-hotplug is enabled 1. no memory no the node we don't online the node, and cpu's node is the nearest node. 2. the node contains some memory the node has been onlined, and cpu's node is still needed to migrate the sleep task on the cpu to the same node. So we do nothing in try_offline_node() in this case. Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx> Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx> Cc: David Rientjes <rientjes@xxxxxxxxxx> Cc: Jiang Liu <liuj97@xxxxxxxxx> Cc: Minchan Kim <minchan.kim@xxxxxxxxx> Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Mel Gorman <mel@xxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Len Brown <lenb@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/memory_hotplug.h | 2 ++ mm/memory_hotplug.c | 3 ++- 2 files changed, 4 insertions(+), 1 deletion(-) diff -puN include/linux/memory_hotplug.h~memory-hotplug-export-the-function-try_offline_node include/linux/memory_hotplug.h --- a/include/linux/memory_hotplug.h~memory-hotplug-export-the-function-try_offline_node +++ a/include/linux/memory_hotplug.h @@ -193,6 +193,7 @@ extern void get_page_bootmem(unsigned lo void lock_memory_hotplug(void); void unlock_memory_hotplug(void); +extern void try_offline_node(int nid); #else /* ! CONFIG_MEMORY_HOTPLUG */ /* @@ -227,6 +228,7 @@ static inline void register_page_bootmem static inline void lock_memory_hotplug(void) {} static inline void unlock_memory_hotplug(void) {} +static inline void try_offline_node(int nid) {} #endif /* ! CONFIG_MEMORY_HOTPLUG */ diff -puN mm/memory_hotplug.c~memory-hotplug-export-the-function-try_offline_node mm/memory_hotplug.c --- a/mm/memory_hotplug.c~memory-hotplug-export-the-function-try_offline_node +++ a/mm/memory_hotplug.c @@ -1702,7 +1702,7 @@ static int check_cpu_on_node(void *data) } /* offline the node if all memory sections of this node are removed */ -static void try_offline_node(int nid) +void try_offline_node(int nid) { pg_data_t *pgdat = NODE_DATA(nid); unsigned long start_pfn = pgdat->node_start_pfn; @@ -1758,6 +1758,7 @@ static void try_offline_node(int nid) */ memset(pgdat, 0, sizeof(*pgdat)); } +EXPORT_SYMBOL(try_offline_node); int __ref remove_memory(int nid, u64 start, u64 size) { _ Patches currently in -mm which might be from wency@xxxxxxxxxxxxxx are x86-numa-dont-check-if-node-is-numa_no_node.patch x86-fix-the-argument-passed-to-sync_global_pgds.patch x86-make-mem=-option-to-work-for-efi-platform.patch memory-hotplug-try-to-offline-the-memory-twice-to-avoid-dependence.patch memory-hotplug-check-whether-all-memory-blocks-are-offlined-or-not-when-removing-memory.patch memory-hotplug-remove-redundant-codes.patch memory-hotplug-remove-sys-firmware-memmap-x-sysfs.patch memory-hotplug-remove-sys-firmware-memmap-x-sysfs-fix.patch memory-hotplug-remove-sys-firmware-memmap-x-sysfs-fix-fix.patch memory-hotplug-remove-sys-firmware-memmap-x-sysfs-fix-fix-fix.patch memory-hotplug-introduce-new-arch_remove_memory-for-removing-page-table.patch memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap.patch memory-hotplug-move-pgdat_resize_lock-into-sparse_remove_one_section.patch memory-hotplug-common-apis-to-support-page-tables-hot-remove.patch memory-hotplug-common-apis-to-support-page-tables-hot-remove-fix-fix.patch memory-hotplug-common-apis-to-support-page-tables-hot-remove-fix-fix-fix.patch memory-hotplug-common-apis-to-support-page-tables-hot-remove-fix-fix-fix-fix.patch memory-hotplug-common-apis-to-support-page-tables-hot-remove-fix-fix-fix-fix-fix.patch memory-hotplug-remove-page-table-of-x86_64-architecture.patch memory-hotplug-remove-page-table-of-x86_64-architecture-fix.patch memory-hotplug-remove-memmap-of-sparse-vmemmap.patch memory-hotplug-integrated-__remove_section-of-config_sparsemem_vmemmap.patch memory_hotplug-clear-zone-when-removing-the-memory.patch memory-hotplug-remove-sysfs-file-of-node.patch memory-hotplug-free-node_data-when-a-node-is-offlined.patch memory-hotplug-do-not-allocate-pdgat-if-it-was-not-freed-when-offline.patch memory-hotplug-consider-compound-pages-when-free-memmap.patch mempolicy-fix-is_valid_nodemask.patch cpu_hotplug-clear-apicid-to-node-when-the-cpu-is-hotremoved.patch memory-hotplug-export-the-function-try_offline_node.patch cpu-hotplug-memory-hotplug-try-offline-the-node-when-hotremoving-a-cpu.patch cpu-hotplugmemory-hotplug-clear-cpu_to_node-when-offlining-the-node.patch do-not-use-cpu_to_node-to-find-an-offlined-cpus-node.patch x86-get-pg_data_ts-memory-from-other-node.patch page_alloc-add-movable_memmap-kernel-parameter.patch page_alloc-introduce-zone_movable_limit-to-keep-movable-limit-for-nodes.patch page_alloc-make-movablecore_map-has-higher-priority.patch page_alloc-bootmem-limit-with-movablecore_map.patch mm-use-zone-present_pages-instead-of-zone-managed_pages-where-appropriate.patch mm-set-zone-present_pages-to-number-of-existing-pages-in-the-zone.patch mm-increase-totalram_pages-when-free-pages-allocated-by-bootmem-allocator.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html