Tom Harper wrote:
If you are trying to infer a difference in GETMAIN behavior here, this
test does not do that. I'm fairly certain that in the 1.10 case, the
storage was obtained from an existing page, and thus was not cleared.
Depending on the storage layout, this could happen in 1.9 as well. If
you change the test to do two GETMAINs, alter the storage to non-zeroes
in the second area, do a FREEMAIN, and they re-obtain the same amount of
storage again, I think you would see that it is not cleared in 1.9
either.
Also, don't forget that GETMAIN/STORAGE behavior was drastically changed
in z/OS 1.10.
Specifically, allocation of virtual storage described by DQEs for low
private is now done from the bottom up, instead of top down. And, if two
logically-adjacent DQEs describe adjacent storage areas, they are merged.
The old (pre z/OS 1.10) behavior can be reinstated by setting the
following in DIAGxx:
NUCLABEL ENABLE(IGVGPVTN)
--
Edward E Jaffe
Phoenix Software International, Inc
5200 W Century Blvd, Suite 800
Los Angeles, CA 90045
310-338-0400 x318
[EMAIL PROTECTED]
http://www.phoenixsoftware.com/
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