Hi Jim, I cannot remember exactly, but what happened was that in IMS the STOP REGION command was issued and the address space was not listed anymore in IMS (Display active showed it was gone). It was visible in JES but nothing could be done about it, it did neither accept cancel nor force. Fault Analyzer showed that the last thing that happened in the address space was trying to load some z/OS routines for termination (if it was not memory termination then it must have been task termination) and failed to load those routines because of an out of storage condition. So the expectation of everyone for this situation is, task termination should be possible regardless if there was an IEFUSI reserving the 512k below or not. If task termination, which is an operating system function, requires storage in an address space with no storage left, it should ensure that there is always enough room for task termination.
Thanks. -----Original Message----- From: Jim Mulder <d10j...@us.ibm.com> To: IBM-MAIN <IBM-MAIN@LISTSERV.UA.EDU> Sent: Fri, Oct 7, 2016 8:39 pm Subject: Re: CEEDUMP possible following 'new' failure > this reminds me of some hanging IMS jobs that could neither be > cancelled nor forced because the routines for memterm could not be > loaded because of memory exhausted. Only BMC Tooling allowed to get > rid of them. > The suggestion in the PMR was to code an IEFUSI to reserve 512k > below to allow memterm to happen in any case. > > Could you please raise another internal discussion why IEFUSI has to > be coded at all in order to allow memterm to happen? > Why can't z/OS just ensure that there is always enough storage > available in the address space for memterm? Since memterm does not access the storage of the address being terminated, there is no connection between IEFUSI and memterm. There is no requirement for any available storage in the address space being memtermed. Task termination, yes. Memory termination, no. Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp. Poughkeepsie NY ---------------------------------------------------------------------- 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
