On Tue, 29 Apr 2014 09:49:09 -0500, Paul Gilmartin <paulgboul...@aim.com> wrote:
>What's a "memory object"? I believe GEMAIN allows obtaining a large block >of memory; subdividing it; and FREEMAINing it piecemeal. GETMAIN/ FRREEMAIN are not used for storage above the bar. From the Assembler Services Reference: <quote> 6.0 IARV64 -- 64-bit virtual storage allocation The IARV64 macro allows a program to use the full range of virtual storage in an address space that is supported by 64-bit addresses. The macro creates and frees storage areas above the two gigabyte address and manages the physical frames behind the storage. Each storage area is a multiple of one megabyte in size and begins on a megabyte boundary. You can think of the IARV64 macro as the GETMAIN/FREEMAIN, PGSER or STORAGE macro for virtual storage above the the two gigabyte address. The two gigabyte address in the address space is marked by a virtual line called the bar. The bar separates storage below the two gigabyte address, called below the bar, from storage above the two gigabyte address, called above the bar. The area above the bar is intended to be used for data only, not for executing programs. Programs use the IARV64 macro to obtain storage above the bar in "chunks" of virtual storage called memory objects. Your installation can set a limit on the use of the address space above the bar for a single address space. The limit is called the MEMLIMIT. </quote> -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
