fix OOM killing processes wrongly thought MPOL_BIND

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@veritas.com>
Acked-by: Christoph Lameter <clameter@sgi.com>
Acked-by: William Irwin <bill.irwin@oracle.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index af981b645a6904affee5320ef77869e10b8db278..3791edfffeebe9595f54ce7d04fe424832aa6af5 100644 (file)
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -176,6 +176,8 @@ static inline int constrained_alloc(struct zonelist *zonelist, gfp_t gfp_mask)
        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)