Discarded from main storage. If it were up to me REFRPROT would be the default, but IBM has better data than I do and doesn't agree.
The last I looked, MVS does not write back a modified PLPA page before stealing it. I don't know how difficult it would be to do the same for full page RENT code. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [[email protected]] on behalf of Paul Gilmartin [[email protected]] Sent: Monday, February 8, 2021 5:09 PM To: [email protected] Subject: Re: LINK vs LOAD/CALL On Mon, 8 Feb 2021 21:47:06 +0000, Seymour J Metz wrote: >AFAIK nothing from OS/360 through z/OS has ever discarded modified pages >containing refreshable coded other than PLPA and SVC transient areas. > "Discarded" from main storage or from page data sets? A Modest Proposal: o Retain page data set frames for REFR modules indefinitely. o When a main storage page of a REFR module is reassigned and a page data set copy exists, don't write it again. Do it! Programmers will learn quickly enough and paging I/O will be optimized. And programmers will beg for REFRPROT. -- gil ---------------------------------------------------------------------- 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
