IBM Mainframe Discussion List <[email protected]> wrote on 03/07/2008 09:37:39 AM:
> -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On > Behalf Of Peter Relson > Sent: Thursday, March 06, 2008 6:45 AM > To: [email protected] > Subject: Re: Is PSATOLD always zero when in SRB mode? > > The answer is "yes". > > But you might want to ask the converse question: > "If PSATOLD is zero, are you in SRB mode?" > The answer is "not always". > > There is a small case in z/OS that we call "pseudo-SRB mode" where a > task was running (had PSATOLD non-zero) and the system zeroes PSATOLD > and continues for a while. This can happen in memory termination > situations, for example. > <SNIP> > > Could you point us to where this is documented (the ways this can > happen)? It seems that we have gotten dumps now and then from customers > where PSATOLD = 0 and it really should not have been (from our > perspective). We were in one of our ESTAE routine or one of our > "DISPLAY" routines. We do not use SRB mode ever (barring the system > doing it on our behalf). It isn't documented. But you will not observe PSATOLD = 0 in your ESTAE routine or "DISPLAY" routines. You may of course observe PSATOLD = 0 in dumps, but your ESTAE routine or "DISPLAY" was not running on that CPU at the time its PSA was dumped. Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY ---------------------------------------------------------------------- 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
