t.Fatal("failed:", err, ok)
							}
						}
					}

					// Expire 50%
					toUnLock := make([]dsync.LockArgs, 0, locks*readers)
					for k, v := range l.lockMap {
						for _, lock := range v {
							if rng.Intn(2) == 0 {
								toUnLock = append(toUnLock, dsync.LockArgs{Resources: []string{k}, UID: lock.UID})
							}
						}
					}
					start := time.Now()
					for _, lock := range toUnLock {