Using checkpoint/restart with subspaces

A program cannot request a checkpoint while running in a subspace. A program running with full address space addressability can request a checkpoint if it has no subspace entries on its DU-AL, or if it ensures that the system will ignore the subspace entries by either:

Deleting all DU-AL entries that were not created specifying CHKPT=IGNORE on the ALESERV request, including subspace entries.
Ensuring that the access list entries were added by specifying CHKPT=IGNORE on the ALESERV request.

A task that either deletes the entries or adds them specifying CHKPT=IGNORE is responsible for rebuilding the subspaces and reestablishing the connections to them. If a restart occurs after a successful checkpoint, the system does not rebuild the subspaces or establish addressability to them.