IBM Mainframe Discussion List <[email protected]> wrote on 08/06/2008 10:03:39 PM:
> Thanks for your reply.Now I am more clear about it. > > with ASN reuse facility,PT and SSAR are replaced by PTI and SSAIR,PTI and > SSAIR will check the instance number.More information(like A/S instance > number) was stored in linkage stack so that PR can return control to exact > right address spaces.. > >But it does not > >prevent a workunit which previously issued the PC from being > >dispatched with that ASID as PASN or SASN. > yes,this could happend in ordinary ASID. but I can't figure out how the > address spaces started with REUSASID=YES prevent this from happenning. or > the same thing also will happen in reusable address spaces? When a reusable ASID is reused, the instance number in the ASTE in incremented. So any attempt to dispatch (via the LASP instruction) to the terminated ASID/Instance number combination, or any attempt to PTI, SSAIR, or PR to it, will program check because the instance number for the terminated address space does not match in instance number in the ASTE of the new address space. 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
