[patch 24/33] fix OOM killing processes wrongly thought MPOL_BIND

[Greg KH]

-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Hugh Dickins <hugh@xxxxxxxxxxx>

I only have CONFIG_NUMA=y for build testing: surprised when trying a memhog
to see lots of other processes killed with "No available memory
(MPOL_BIND)".  memhog is killed correctly once we initialize nodemask in
constrained_alloc().

Signed-off-by: Hugh Dickins <hugh@xxxxxxxxxxx>
Acked-by: Christoph Lameter <clameter@xxxxxxx>
Acked-by: William Irwin <bill.irwin@xxxxxxxxxx>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 mm/oom_kill.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -176,6 +176,8 @@ static inline int constrained_alloc(stru
 	struct zone **z;
 	nodemask_t nodes;
 	int node;
+
+	nodes_clear(nodes);
 	/* node has memory ? */
 	for_each_online_node(node)
 		if (NODE_DATA(node)->node_present_pages)

-- 
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