What does currently addressable address space mean I do a SSAR to the address space that invoked the SRB, before issuing the IEAMSCHD I do SYSEVENT DONTSWAP to ensure the address space is not swapped out
Thanks -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Jim Mulder Sent: Monday, July 31, 2017 4:16 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: PGSER R,FIX question The documentation for PGSER says: ,ASCB=ascb addr Specifies the address of the ASCB for the currently addressable address space. You are probably specifying an ASCB which is not the currently addressable address space. In that case, PGSER performs the operation against the currently addressable address space, while holding serialization for the address space specified by the ASCB parameter. The results will be not what you wanted, and potentially disastrous due to the lack of serialization of the address space where the operation is performed. I would prefer that PGSER should issue an ABEND when the ASCB parameter does not specify the currently addressable address space, and I intend to exert some influence toward getting that implemented in a future release. Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp. Poughkeepsie NY IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> wrote on 07/31/2017 02:22:20 AM: > From: Joseph Reichman <reichman...@gmail.com> > To: IBM-MAIN@LISTSERV.UA.EDU > Date: 07/31/2017 03:43 AM > Subject: Re: PGSER R,FIX question > Sent by: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> > > Sorry I should of pasted the entire code It is with BRANCH=SPECIAL > > The code that I have works with z/os 2.2 ( at least the PGSER doesn't > abend and I am able to move 4 bytes into the program that scheduled > the SRB) the other difference is the > 2.2 code is running in a subtask > > The code that abended is running z/os 2.1 > > > > > On Jul 31, 2017, at 2:11 AM, Jim Mulder <d10j...@us.ibm.com> wrote: > > > > I cannot answer your question from the incomplete information you have > > provided. > > Keep in mind the the ASCB parameter you have specified on the PGSER macro > > is > > applicable only to BRANCH=SPECIAL requests, and even then, possibly not in > > the > > way you might be expecting. > > > > Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp. > > Poughkeepsie NY > > > >> It is my understanding the I can page fix any storage whiting a > >> page, > > the > >> storage does not have to start on page boundary. > >> > >> > >> > >> I am getting a 18A abend with R0= 35000301 indicating The page had not > >> been obtained by a GETMAIN macro > >> > >> > >> > >> Here is my STORAGE OBTAIN > >> > >> > >> > >> STORAGE OBTAIN,LENGTH=(R0),ADDR=(R7),BNDRY=PAGE,SP=0 > >> > >> > >> > >> The PGSER > >> > >> > >> > >> PGSER R, X > >> > >> FIX, X > >> > >> A=(R7), X > >> > >> ASCB=(R8), X > >> > >> > >> > >> R7 points to X'88' within that page, it is executed from a SRB to page > > fix > >> storage in the scheduling address space for a few instructions > >> while I > > move > >> data in > >> > >> > >> > >> > >> > >> PS I have the address space swapped in before I issue the IEAMSCHD > >> > >> > >> > >> > >> ---------------------------------------------------------------------- > >> For IBM-MAIN subscribe / signoff / archive access instructions, > >> send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > >> > > > > > > > > -------------------------------------------------------------------- > > -- For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to lists...@listserv.ua.edu with the message: INFO > > IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
