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| author | Yasunori Goto <y-goto@jp.fujitsu.com> | 2006-06-27 02:53:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-27 17:32:36 -0700 |
| commit | 0fc44159bfcb5b0afa178f9c3f50db23aebc76ff (patch) | |
| tree | d87e47c0f5e6b2eff1d9113d3495d185924734d9 /mm | |
| parent | 1f04bbd2d396a701c5af2e5b92bad896c2550c16 (diff) | |
| download | linux-3.10-0fc44159bfcb5b0afa178f9c3f50db23aebc76ff.tar.gz linux-3.10-0fc44159bfcb5b0afa178f9c3f50db23aebc76ff.tar.bz2 linux-3.10-0fc44159bfcb5b0afa178f9c3f50db23aebc76ff.zip | |
[PATCH] Register sysfs file for hotplugged new node
When new node becomes enable by hot-add, new sysfs file must be created for
new node. So, if new node is enabled by add_memory(), register_one_node() is
called to create it. In addition, I386's arch_register_node() and a part of
register_nodes() of powerpc are consolidated to register_one_node() as a
generic_code().
This is tested by Tiger4(IPF) with node hot-plug emulation.
Signed-off-by: Keiichiro Tokunaga <tokuanga.keiich@jp.fujitsu.com>
Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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 f13783e81eb..ea4038838b0 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); |