On 2021-08-30 17:28 PM, Charles Mills wrote:
Seriously, I agree with @Gil. Wasting a few bytes should be the default, not
leaving a few bytes unprotected.
It's a bit of a double-edged sword...
The behavior of REFRPROT is clearly stated in documentation:
https://www.ibm.com/docs/en/zos/2.4.0?topic=lpa-using-refrprot-statement
If it is desired to have all parts of a program be page protected, I
suggest that it is fairly straightforward task to pad a program out to
exactly occupy full pages.
To automatically extend all REFR modules to a multiple of 4K by default
on a real system could result in much more than "wasting a few bytes".
To put things in perspective, I have seen customer systems with over two
hundred subsystems in their SSCVT chain (yes, I know the SSCVTs
themselves are not programs, but they do have programs related to them),
or as many as seven ISV products front-ending the same SVC. There can be
a lot of products adding REFR modules to DLPA or CSA, and all those "few
bytes" can add up.
--
Regards, Gord Tomlin
Action Software International
(a division of Mazda Computer Corporation)
Tel: (905) 470-7113, Fax: (905) 470-6507
Support: https://actionsoftware.com/support/
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