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author | Ingo Molnar <mingo@elte.hu> | 2010-12-08 19:15:26 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2010-12-08 19:15:29 (GMT) |
commit | 8e9255e6a2141e050d51bc4d96dbef494a87d653 (patch) | |
tree | f190b142830153eaab05555a93c4f71a144ba3d4 /mm/memory_hotplug.c | |
parent | 5091faa449ee0b7d73bc296a93bca9540fc51d0a (diff) | |
parent | 6313e3c21743cc88bb5bd8aa72948ee1e83937b6 (diff) | |
download | linux-8e9255e6a2141e050d51bc4d96dbef494a87d653.tar.xz |
Merge branch 'linus' into sched/core
Merge reason: we want to queue up dependent cleanup
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'mm/memory_hotplug.c')
-rw-r--r-- | mm/memory_hotplug.c | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 9260314..2c6523a 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -34,6 +34,23 @@ #include "internal.h" +DEFINE_MUTEX(mem_hotplug_mutex); + +void lock_memory_hotplug(void) +{ + mutex_lock(&mem_hotplug_mutex); + + /* for exclusive hibernation if CONFIG_HIBERNATION=y */ + lock_system_sleep(); +} + +void unlock_memory_hotplug(void) +{ + unlock_system_sleep(); + mutex_unlock(&mem_hotplug_mutex); +} + + /* add this memory to iomem resource */ static struct resource *register_memory_resource(u64 start, u64 size) { @@ -493,7 +510,7 @@ int mem_online_node(int nid) pg_data_t *pgdat; int ret; - lock_system_sleep(); + lock_memory_hotplug(); pgdat = hotadd_new_pgdat(nid, 0); if (pgdat) { ret = -ENOMEM; @@ -504,7 +521,7 @@ int mem_online_node(int nid) BUG_ON(ret); out: - unlock_system_sleep(); + unlock_memory_hotplug(); return ret; } @@ -516,7 +533,7 @@ int __ref add_memory(int nid, u64 start, u64 size) struct resource *res; int ret; - lock_system_sleep(); + lock_memory_hotplug(); res = register_memory_resource(start, size); ret = -EEXIST; @@ -563,7 +580,7 @@ error: release_memory_resource(res); out: - unlock_system_sleep(); + unlock_memory_hotplug(); return ret; } EXPORT_SYMBOL_GPL(add_memory); @@ -791,7 +808,7 @@ static int offline_pages(unsigned long start_pfn, if (!test_pages_in_a_zone(start_pfn, end_pfn)) return -EINVAL; - lock_system_sleep(); + lock_memory_hotplug(); zone = page_zone(pfn_to_page(start_pfn)); node = zone_to_nid(zone); @@ -880,7 +897,7 @@ repeat: writeback_set_ratelimit(); memory_notify(MEM_OFFLINE, &arg); - unlock_system_sleep(); + unlock_memory_hotplug(); return 0; failed_removal: @@ -891,7 +908,7 @@ failed_removal: undo_isolate_page_range(start_pfn, end_pfn); out: - unlock_system_sleep(); + unlock_memory_hotplug(); return ret; } |