diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory_hotplug.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index f13783e81eb6..ea4038838b0a 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -256,9 +256,19 @@ int add_memory(int nid, u64 start, u64 size) if (ret < 0) goto error; - /* we online node here. we have no error path from here. */ + /* we online node here. we can't roll back from here. */ node_set_online(nid); + if (new_pgdat) { + ret = register_one_node(nid); + /* + * If sysfs file of new node can't create, cpu on the node + * can't be hot-added. There is no rollback way now. + * So, check by BUG_ON() to catch it reluctantly.. + */ + BUG_ON(ret); + } + /* register this memory as resource */ register_memory_resource(start, size); |