scheduler: reduce deviceShare memory overhead

Signed-off-by: wangjianyu.wjy <wangjianyu.wjy@alibaba-inc.com>

pkg/scheduler/plugins/deviceshare/plugin.go

@@ -386,6 +386,12 @@ func (p *Plugin) FilterReservation(ctx context.Context, cycleState *framework.Cy
 }
 
 func (p *Plugin) Reserve(ctx context.Context, cycleState *framework.CycleState, pod *corev1.Pod, nodeName string) *framework.Status {
+	defer func() {
+		// ReservationRestoreState is O(n) complexity of node number of the cluster.
+		// cleanReservationRestoreState clears ReservationRestoreState in the stateData to reduce memory cost before entering
+		// the binding cycle.
+		cleanReservationRestoreState(cycleState)
+	}()
 	state, status := getPreFilterState(cycleState)
 	if !status.IsSuccess() {
 		return status

pkg/scheduler/plugins/deviceshare/reservation.go

@@ -67,6 +67,10 @@ func getReservationRestoreState(cycleState *framework.CycleState) *reservationRe
 	return state
 }
 
+func cleanReservationRestoreState(cycleState *framework.CycleState) {
+	cycleState.Delete(reservationRestoreStateKey)
+}
+
 func (s *reservationRestoreStateData) Clone() framework.StateData {
 	return s
 }