Merge pull request #358 from thaJeztah/handle_domain_threaded

cgroup2: Manager.Delete: handle both "threaded" and "domain threaded"

Author: fuweid

cgroup2/manager.go

@@ -472,10 +472,6 @@ func (c *Manager) fallbackKill() error {
 }
 
 func (c *Manager) Delete() error {
-	var (
-		tasks    []uint64
-		threaded bool
-	)
 	// Kernel prevents cgroups with running process from being removed,
 	// check the tree is empty.
 	//
@@ -485,13 +481,13 @@ func (c *Manager) Delete() error {
 		if !os.IsNotExist(err) {
 			return err
 		}
-	} else {
-		threaded = cgType == Threaded
 	}
 
-	if threaded {
+	var tasks []uint64
+	switch cgType {
+	case Threaded, DomainThreaded:
 		tasks, err = c.Threads(true)
-	} else {
+	default:
 		tasks, err = c.Procs(true)
 	}
 	if err != nil {