NETWORKED COMPUTER SYSTEM AND METHOD OF COMMUNICATING USING MULTIPLE REQUEST PACKET CLASSES TO PREVENT DEADLOCK

A networked computer system and method of communicating classify request packets into multiple classes, with one class devoted to non-propagable requests that may be handled locally by destination nodes in the computer system. The multiple classes of requests are separately handled in the networked computer system such that an inability of a node to handle a request in another class does not hinder the ability of the node to process non-propagable requests, thereby avoiding deadlocks in the computer system.