On Tue, 9 Feb 2021 10:13:36 -0500, Peter Relson wrote: >Regarding page-protecting only the "whole pages", there really are only >two viable choices. >One is to do what we do; the other is to round up the module to a >whole-page multiple. > Or, leave the rest of the page unused, or use it only for other modules with similar charactristics.
>The latter can conceivably break applications. > >Other options that you might submit an RFE for, but that are not "safe" if >you have code that is nominally reentrant but does (let's hope correctly) >store into itself are: >-- always put reentrant code into key 0 storage, regardless of APF state >(this does happen for a KEY=NINE task) >-- always page-protect reentrant code >either of these will break non-key-0 reentrant code that stores into >itself. > You're discussing RENT. The concern should be with REFR. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
