diff --git a/pkg/kubelet/cm/container_manager_linux.go b/pkg/kubelet/cm/container_manager_linux.go
index 02f56d82418..f29988346e5 100644
--- a/pkg/kubelet/cm/container_manager_linux.go
+++ b/pkg/kubelet/cm/container_manager_linux.go
@@ -330,21 +330,19 @@ func NewContainerManager(mountUtil mount.Interface, cadvisorInterface cadvisor.I
 	}
 	cm.topologyManager.AddHintProvider(cm.cpuManager)
 
-	if utilfeature.DefaultFeatureGate.Enabled(kubefeatures.MemoryManager) {
-		cm.memoryManager, err = memorymanager.NewManager(
-			nodeConfig.ExperimentalMemoryManagerPolicy,
-			machineInfo,
-			cm.GetNodeAllocatableReservation(),
-			nodeConfig.ExperimentalMemoryManagerReservedMemory,
-			nodeConfig.KubeletRootDir,
-			cm.topologyManager,
-		)
-		if err != nil {
-			klog.ErrorS(err, "Failed to initialize memory manager")
-			return nil, err
-		}
-		cm.topologyManager.AddHintProvider(cm.memoryManager)
+	cm.memoryManager, err = memorymanager.NewManager(
+		nodeConfig.ExperimentalMemoryManagerPolicy,
+		machineInfo,
+		cm.GetNodeAllocatableReservation(),
+		nodeConfig.ExperimentalMemoryManagerReservedMemory,
+		nodeConfig.KubeletRootDir,
+		cm.topologyManager,
+	)
+	if err != nil {
+		klog.ErrorS(err, "Failed to initialize memory manager")
+		return nil, err
 	}
+	cm.topologyManager.AddHintProvider(cm.memoryManager)
 
 	return cm, nil
 }
@@ -577,12 +575,9 @@ func (cm *containerManagerImpl) Start(ctx context.Context, node *v1.Node,
 	}
 
 	// Initialize memory manager
-	if utilfeature.DefaultFeatureGate.Enabled(kubefeatures.MemoryManager) {
-		containerMap, _ := buildContainerMapAndRunningSetFromRuntime(ctx, runtimeService)
-		err := cm.memoryManager.Start(memorymanager.ActivePodsFunc(activePods), sourcesReady, podStatusProvider, runtimeService, containerMap)
-		if err != nil {
-			return fmt.Errorf("start memory manager error: %v", err)
-		}
+	err = cm.memoryManager.Start(memorymanager.ActivePodsFunc(activePods), sourcesReady, podStatusProvider, runtimeService, containerMap)
+	if err != nil {
+		return fmt.Errorf("start memory manager error: %v", err)
 	}
 
 	// cache the node Info including resource capacity and
diff --git a/pkg/kubelet/metrics/metrics.go b/pkg/kubelet/metrics/metrics.go
index 3050f3c5663..c7b6262563d 100644
--- a/pkg/kubelet/metrics/metrics.go
+++ b/pkg/kubelet/metrics/metrics.go
@@ -1065,10 +1065,8 @@ func Register(collectors ...metrics.StableCollector) {
 		legacyregistry.MustRegister(CPUManagerSharedPoolSizeMilliCores)
 		legacyregistry.MustRegister(CPUManagerExclusiveCPUsAllocationCount)
 		legacyregistry.MustRegister(ContainerAlignedComputeResources)
-		if utilfeature.DefaultFeatureGate.Enabled(features.MemoryManager) {
-			legacyregistry.MustRegister(MemoryManagerPinningRequestTotal)
-			legacyregistry.MustRegister(MemoryManagerPinningErrorsTotal)
-		}
+		legacyregistry.MustRegister(MemoryManagerPinningRequestTotal)
+		legacyregistry.MustRegister(MemoryManagerPinningErrorsTotal)
 		legacyregistry.MustRegister(TopologyManagerAdmissionRequestsTotal)
 		legacyregistry.MustRegister(TopologyManagerAdmissionErrorsTotal)
 		legacyregistry.MustRegister(TopologyManagerAdmissionDuration)