Because all of the VFS and vnode operations can be called in cross-memory mode, a PFS that must invoke MVS™ functions that cannot run in this mode must attach a worker task, or tasks, to accomplish these functions. A worker task is a subtask that performs non-cross memory work for PFS operations.

See Using daemon tasks within a PFS for information about some services that make this task easier.

Although the PFS_Init task can be used as a worker task, if this task terminates, the PFS also terminates.