From: Michal Hocko <mhocko@xxxxxxxx>
try_online_node calls hotadd_new_pgdat which already calls
build_all_zonelists. So the additional call is redundant. Even though
hotadd_new_pgdat will only initialize zonelists of the new node this is
the right thing to do because such a node doesn't have any memory so
other zonelists would ignore all the zones from this node anyway.
Cc: Toshi Kani <toshi.kani@xxxxxx>
Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
---
mm/memory_hotplug.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 639b8af37c45..0d2f6a11075c 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1104,13 +1104,6 @@ int try_online_node(int nid)
node_set_online(nid);
ret = register_one_node(nid);
BUG_ON(ret);
-
- if (pgdat->node_zonelists->_zonerefs->zone == NULL) {
- mutex_lock(&zonelists_mutex);
- build_all_zonelists(NULL);
- mutex_unlock(&zonelists_mutex);
- }
-
out:
mem_hotplug_done();
return ret;
--
2.11.0
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