On Thu, 5 Feb 2009 11:02:42 -0700, Roach, Dennis (N-GHG) <[email protected]> wrote:
>I never knew about the 4096 or 8192 rules. I had always been taught that >the ONLY time storage is cleared is when RSM assigns a real page to a >virtual page that is not already backed by one in aux storage. I don't think your "rule" is not one that a programmer can make use of, as it does not provide a way to know when RSM will take that action. The 4096+page boundary or >= 8192 rule is one a programmer can use, and in fact describes the cases that lead to your statement. If you have any other GETMAIN or STORAGE OBTAIN, then you have no guarantee that a new page was assigned, and thus no guarantee of zeroed storage. -- Walt Farrell, CISSP IBM STSM, z/OS Security Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
