cgroups: add support for oom control

This patch add support for diable OOM Killer.

Signed-off-by: Hu Keping <hukeping@huawei.com>

cgroups/fs/memory.go

@@ -56,6 +56,12 @@ func (s *MemoryGroup) Set(path string, cgroup *configs.Cgroup) error {
 		}
 	}
 
+	if cgroup.OomKillDisable {
+		if err := writeFile(path, "memory.oom_control", "1"); err != nil {
+			return err
+		}
+	}
+
 	return nil
 }
 

configs/cgroup.go

@@ -51,4 +51,7 @@ type Cgroup struct {
 
 	// Parent slice to use for systemd TODO: remove in favor or parent
 	Slice string `json:"slice"`
+
+	// Whether to disable OOM Killer
+	OomKillDisable bool `json:"oom_kill_disable"`
 }