> The usual C malloc() keeps track of allocated memory with data just > before each allocated block. > > As well as I understand it, GETMAIN works similarly. > > As with the note about garbage collection, that tends to cause a lot > of page-in references going > through the linked-list of memory blocks. > > I believe that there have been some improvements along the way, but > don't know about them.
At least since MVS/XA (circa 1982), VSM control information is kept in cell pool extents located in ELSQA. Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
