This area allows local storage within a virtual address space to be obtained in the requestor's storage protect key. The area is used for control blocks that can be obtained only by authorized programs having appropriate storage protect keys. These control blocks were placed in storage by system components on behalf of the user.

These subpools are intermixed with LSQA and SWA. Subpool 229 is fetch protected; subpools 230 and 249 are not. All three subpools are pageable. Subpools 229 and 230 are freed automatically at task termination; subpool 249 is freed automatically at jobstep task termination.