Warning track interruption 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.

主权项

1. A computer program product for facilitating processing in a computing environment, said computer program product comprising:
a computer readable storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising:
providing by a first program to a second program a warning track facility installed indication indicating installation of a warning track facility within the computing environment, the indication of installation to be received by the second program, and the warning track facility to provide to the second program a grace period to perform a first function;obtaining, by the first program based on the providing, an unsolicited indication that the second program has registered for the warning track facility, the registration comprising an indication to the first program that the second program understands a warning track facility protocol of the warning track facility and intends to participate in the warning track facility, the warning track facility protocol comprising an agreement between the first program and the second program that the second program understands it is to be given the grace period and notification that the grace period has begun;enabling, based on obtaining the indication that the second program has registered, the warning track facility for the second program;providing by the first program to the second program a warning track notification to notify the second program of the grace period in which to initiate the first function; andperforming by the first program a second function subsequent to the grace period.