ALLOC means GETMAIN/STORAGE OBTAIN I mean I understand that z/os always gets in increments of 1K or 4096 so free means it was part of the storage z/os obtained but the user didn’t request so the storage that the user requested really starts at 7FF9CE28 right ?
> On Jul 21, 2022, at 10:28 AM, Harris Morgenstern <[email protected]> wrote: > From MVS Authorized Assembler Services Reference: > > ,SPACE=ALLOC > ,SPACE=FREE > ,SPACE=UNALLOC > Specifies whether allocated, allocated and free, or unallocated storage is to > be reported. > ALLOC indicates that the virtual addresses and lengths of blocks of storage > allocated to the specific > area are to be listed. > FREE indicates that in addition to the information supplied by ALLOC, the > virtual addresses and > lengths of free space within the allocated blocks are to be listed. > UNALLOC indicates that the virtual addresses and lengths of unallocated > blocks of storage are to be > listed. Both TCB and REAL are ignored when UNALLOC is specified. > Note: An allocated block of storage is a block that is a multiple of 4K in > size and contains some > storage that has been allocated via a GETMAIN or STORAGE macro. The free > storage is the storage > within an allocated block that has not been allocated via a GETMAIN or > STORAGE macro. An > unallocated block of storage is a block that is a multiple of 4K in size and > contains no allocated > storage. > > The NOTE at the bottom is relevant. Free storage exists within an allocated > block. So in your case: > > > 0008E508 008FD250 00000001 7FF9C000 00051000 00000001 7FF9C000 00000E28 > > > > The allocated block starts at 7FF9C000x and is of length 51000x. There is > free space within this allocated block starting at > > 7FF9C000x of length E28x. > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
