Processing device and vehicle control system

A processing system comprising:

• a first processing device;
• at least one processing device that is connected to the first processing device;
• a substitute program transmitting section;
• a substitute program receiving section, wherein
• during a period in which the at least one processing device executes a control operation in accordance with a control program installed in the at least one processing device, the first processing device acquires a substitute program that substitutes for the control program, the substitute program is a program for executing a substitute operation when failure occurs, and the substitute program transmitting section transmits the substitute program to the substitute program receiving section at a priority that is lower than a priority of a control command;
• additional processing devices which are connected to the at least one processing device via a network;
• a substitute program acquiring section;
• and
• wherein
• during the period in which the at least one processing device executes the control operation, the additional processing devices acquire the substitute program,
• the substitute program acquiring section acquires the substitute program from one of the at least one processing device or the additional processing devices in which the reconfiguration management section is arranged, and
• the substitute program transmitting section transmits the substitute program,
• the substitute program is determined in accordance with a vehicle control state, and
• the reconfiguration management section is configured to confirm whether installation of the substitute program has been completed by checking for receipt of an installation completion notification in the vehicle control state.