I found below in the <principle of operation>, I should read book more carefully and then ask :)
When the ASN-and-LXreuse facility is installed and enabled,the first operand of LASP is two doublewords contains PASTEIN and SASTEIN, ASN may be translated to obtain ASTE, the ASTEIN in the located ASTE is checked for being equal to the ASTEIN in the operand. On 8/7/08, Jim Mulder <[EMAIL PROTECTED]> wrote: > > 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 > > ---------------------------------------------------------------------- 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
