linux/mm/memory_hotplug.c, branch v3.9

mm/hotplug: only free wait_table if it's allocated by vmalloc

2013-03-22T23:41:20Z

zone->wait_table may be allocated from bootmem, it can not be freed. Signed-off-by: Jianguo Wu Reviewed-by: Tang Chen Cc: Tang Chen Cc: Jiang Liu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: remove_memory(): fix end_pfn setting

2013-03-13T22:21:44Z

remove_memory() calls walk_memory_range() with [start_pfn, end_pfn), where end_pfn is exclusive in this range. Therefore, end_pfn needs to be set to the next page of the end address. Signed-off-by: Toshi Kani Cc: Wen Congyang Cc: Tang Chen Cc: Kamezawa Hiroyuki Cc: KOSAKI Motohiro Cc: Jiang Liu Cc: Jianguo Wu Cc: Lai Jiangshan Cc: Wu Jianguo Cc: Yasuaki Ishimatsu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm/memory_hotplug: use pgdat_end_pfn() instead of open coding the same.

2013-02-24T01:50:21Z

Replace open coded pgdat_end_pfn() with helper function. Signed-off-by: Cody P Schafer Cc: David Hansen Cc: Catalin Marinas Cc: Johannes Weiner Cc: Mel Gorman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm/memory_hotplug: use ensure_zone_is_initialized()

2013-02-24T01:50:21Z

Remove open coding of ensure_zone_is_initialzied(). Signed-off-by: Cody P Schafer Cc: David Hansen Cc: Catalin Marinas Cc: Johannes Weiner Cc: Mel Gorman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: add helper ensure_zone_is_initialized()

2013-02-24T01:50:21Z

ensure_zone_is_initialized() checks if a zone is in a empty & not initialized state (typically occuring after it is created in memory hotplugging), and, if so, calls init_currently_empty_zone() to initialize the zone. Signed-off-by: Cody P Schafer Cc: David Hansen Cc: Catalin Marinas Cc: Johannes Weiner Cc: Mel Gorman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: add & use zone_end_pfn() and zone_spans_pfn()

2013-02-24T01:50:20Z

Add 2 helpers (zone_end_pfn() and zone_spans_pfn()) to reduce code duplication. This also switches to using them in compaction (where an additional variable needed to be renamed), page_alloc, vmstat, memory_hotplug, and kmemleak. Note that in compaction.c I avoid calling zone_end_pfn() repeatedly because I expect at some point the sycronization issues with start_pfn & spanned_pages will need fixing, either by actually using the seqlock or clever memory barrier usage. Signed-off-by: Cody P Schafer Cc: David Hansen Cc: Catalin Marinas Cc: Johannes Weiner Cc: Mel Gorman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: remove offlining arg to migrate_pages

2013-02-24T01:50:19Z

No functional change, but the only purpose of the offlining argument to migrate_pages() etc, was to ensure that __unmap_and_move() could migrate a KSM page for memory hotremove (which took ksm_thread_mutex) but not for other callers. Now all cases are safe, remove the arg. Signed-off-by: Hugh Dickins Cc: Rik van Riel Cc: Petr Holasek Cc: Andrea Arcangeli Cc: Izik Eidus Cc: Gerald Schaefer Cc: KOSAKI Motohiro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: increase totalram_pages when free pages allocated by bootmem allocator

2013-02-24T01:50:15Z

Function put_page_bootmem() is used to free pages allocated by bootmem allocator, so it should increase totalram_pages when freeing pages into the buddy system. Signed-off-by: Jiang Liu Cc: Wen Congyang Cc: David Rientjes Cc: Jiang Liu Cc: Maciej Rutecki Cc: Chris Clayton Cc: "Rafael J . Wysocki" Cc: Mel Gorman Cc: Minchan Kim Cc: KAMEZAWA Hiroyuki Cc: Michal Hocko Cc: Jianguo Wu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

cpu-hotplug,memory-hotplug: clear cpu_to_node() when offlining the node

2013-02-24T01:50:13Z

When the node is offlined, there is no memory/cpu on the node. If a sleep task runs on a cpu of this node, it will be migrated to the cpu on the other node. So we can clear cpu-to-node mapping. [akpm@linux-foundation.org: numa_clear_node() and numa_set_node() can no longer be __cpuinit] Signed-off-by: Wen Congyang Signed-off-by: Tang Chen Cc: Yasuaki Ishimatsu Cc: David Rientjes Cc: Jiang Liu Cc: Minchan Kim Cc: KOSAKI Motohiro Cc: Mel Gorman Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

memory-hotplug: export the function try_offline_node()

2013-02-24T01:50:13Z

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. [rientjes@google.com: export the function try_offline_node() fix] Signed-off-by: Wen Congyang Signed-off-by: Tang Chen Cc: Yasuaki Ishimatsu Cc: David Rientjes Cc: Jiang Liu Cc: Minchan Kim Cc: KOSAKI Motohiro Cc: Mel Gorman Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Peter Zijlstra Cc: Len Brown Signed-off-by: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds