Storage system and storage control method

A storage control method for data in a storage system,

• the storage system including:
• a controller including a plurality of processors;
• an interface device to which a storage device is coupled;
• and a plurality of queues associated with the interface device, the queues including a private queue and a public queue, the private queue being a queue allocated with only a first processor as one of the plurality of processors, the public queue being a queue allocated with two or more second processors in the plurality of processors, the second processor being any one of the plurality of processors other than the first processor,
• the method comprising:
• causing the controller,
• when data transmitted from a processor to the interface device is data issued from the first processor, to store the data in the private queue without executing exclusion processing, and
• when data transmitted from a processor to the interface device is data issued from the second processor, to store the data in the public queue after executing the exclusion processing.