1. A method of facilitating processing in a processing environment, said method comprising: performing, by one or more components of the processing environment, an I/O operation for a task of the processing environment, wherein execution of the task has been interrupted; indicating completion of the I/O operation absent use of an I/O interrupt, wherein indicating completion comprises setting, by a first processor of the processing environment, an indicator associated with task; and resuming, by a second processor of the processing environment, execution of the task, in response to an indication of completion, wherein the first processor may be the same or different from the second processor.