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authorYasunori Goto <y-goto@jp.fujitsu.com>2006-06-27 13:53:39 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-28 04:32:37 +0400
commit7049027c6f0098eb6b23b8f6ca65a905541faf81 (patch)
treeab5528625be6e79c02767c6d9444599c1980cf0e /include/linux
parentae5a2c1c9b2bc3633032f97d02e60ae547a6047c (diff)
downloadlinux-7049027c6f0098eb6b23b8f6ca65a905541faf81.tar.xz
[PATCH] pgdat allocation and update for ia64 of memory hotplug: update pgdat address array
This is to refresh node_data[] array for ia64. As I mentioned previous patches, ia64 has copies of information of pgdat address array on each node as per node data. At v2 of node_add, this function used stop_machine_run() to update them. (I wished that they were copied safety as much as possible.) But, in this patch, this arrays are just copied simply, and set node_online_map bit after completion of pgdat initialization. So, kernel must touch NODE_DATA() macro after checking node_online_map(). (Current code has already done it.) This is more simple way for just hot-add..... Note : It will be problem when hot-remove will occur, because, even if online_map bit is set, kernel may touch NODE_DATA() due to race condition. :-( Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/memory_hotplug.h4
1 files changed, 1 insertions, 3 deletions
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 569b1f6c27d1..9b6260007e5e 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -91,9 +91,7 @@ static inline pg_data_t *arch_alloc_nodedata(int nid)
static inline void arch_free_nodedata(pg_data_t *pgdat)
{
}
-static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
-{
-}
+extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat);
#else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */