mm, oom: prefer thread group leaders for display purposes

[deliverable/linux.git] / mm / memcontrol.c

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 9537e1389ee6a3551064bcfe58938cddc5a2d908..c8336e8f8df064c9a1ecdbb8055a785b3481d4f2 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1841,13 +1841,18 @@ static void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask,
                                break;
                        };
                        points = oom_badness(task, memcg, NULL, totalpages);
-                       if (points > chosen_points) {
-                               if (chosen)
-                                       put_task_struct(chosen);
-                               chosen = task;
-                               chosen_points = points;
-                               get_task_struct(chosen);
-                       }
+                       if (!points || points < chosen_points)
+                               continue;
+                       /* Prefer thread group leaders for display purposes */
+                       if (points == chosen_points &&
+                           thread_group_leader(chosen))
+                               continue;
+
+                       if (chosen)
+                               put_task_struct(chosen);
+                       chosen = task;
+                       chosen_points = points;
+                       get_task_struct(chosen);
                }
                css_task_iter_end(&it);
        }