PROVIDING BY ONE PROGRAM TO ANOTHER PROGRAM ACCESS TO A WARNING TRACK FACILITY

摘要

A program (e.g. an operating system) is provided a warning that it has a grace period in which to perform a function such as cleanup (e.g. complete stop and/or move a dispatchable unit). The program is being warned in one example that it is losing access to its shared resources. For instance in a virtual environment a guest program is warned that it is about to lose its central processing unit resources and therefore it is to perform a function such as cleanup.