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On Sep 10, 2013, at 7:34 AM, Peter Relson <[email protected]> wrote: >>> So in other words STNSM AREA,X'FC' before > >> That affects the PSW of the CPU your code is running on; it doesn't >> disable or lock any other CPU. > > True. But it does not need to. Disablement of "your" CPU is the > serialization that is required. > >> And STOSM AREA,X'03'. After <fixing typo> > > This presumes that you were enabled for both interrupt types before the > STNSM. > If you know that that is true, then this is fine. > If it might be false, then this could be catastrophic to the system. > An executed STOSM using the value saved on the STNSM (or an IF-test > that uses X'03' if the saved mask was X'03' and does an executed STOSM if > not) > is the fully safe method. > > Be sure that your code and all your data are page-fixed if you are going > to disable. > > Peter Relson > z/OS Core Technology Design > > ---------------------------------------------------------------------- > 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
