Parasitic Source inductance and switching Mosfet
The inductance in the source won't help to turn the MOSFET off; as soon as the gate voltage drops, the source voltage drops (due to L2 back emf and will fall below 0 volts) and, this ensures that the MOSFET stays on longer until the energy previously stored in L2 is depleted. It won't oscillate unless L2 has significant parasitic capacitance and Q factor.