I believe you mean the USE2GTO32G=»NO|YES keyword, which defaults to NO and which allows the caller to acquire virtual storage above the 2G proto-bar but possibly below the 4G quasi-bar, or even up to the 32G neo-bar. SYS1.MACLIB(IARV64) shows this parameter as existing, but the Authorized Assembler Services book (SA22-7610-17; SEP 2009) contains zero instances of the character string "USE2G". Regardless of other restrictions that IBM may add to the use of storage above the bar, "the bar" is still the virtual address 2GB.
Bill Fairchild Rocket Software -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of John McKown Sent: Tuesday, July 05, 2011 11:15 AM To: IBM-MAIN@bama.ua.edu Subject: Re: Lines, Bars and ... mini-bars??? Found it here: http://publib.boulder.ibm.com/infocenter/zos/v1r12/index.jsp?topic=/com.ibm.zos.r12.ieaa200/iea2a2b0496.htm <quote> ,LOCALSYSAREA=NO |,LOCALSYSAREA=YES |An optional input parameter that specifies whether this is an | explicit allocation request for 64-bit virtual storage in local system | area. The localsysarea parameter can be used only by callers running |in supervisor state or with a PSW key 0-7. The default is LOCALSYSAREA= | NO. | | ,LOCALSYSAREA=NO | The request will not be satisfied from the local system area. | ,LOCALSYSAREA=YES | The request is to be satisfied from the local system area. The | storage obtained with this keyword will not be copied during Fork | processing. The use of local system area storage does not preclude | checkpoint from succeeding. </quote> However "local system area" is not defined in this book. But in SG247853, the diagram on page 120 shows "System Area" from 32 Gb to 288 Gb and still shows the "bar". I'm confused. On Tue, 2011-07-05 at 09:17 -0500, Walt Farrell wrote: > On Tue, 5 Jul 2011 13:20:58 +0000, Bob Shannon > <bshan...@rocketsoftware.com> > wrote: > > >>AFAIK the only fella that grabs storage from the 2G-4G area is Java > >>via an > IBM-internal API > > > >IIRC, the Private Area above the bar begins at 16Gb. Everything below > >that > is reserved for Java. This change was implemented via PTF. > > I'm pretty sure it's higher than that as of z/OS V1.12, Bob, with the > implementation of the local system area (LOCALSYSAREA=YES on IARV64 > GETSTOR). But I don't remember the details. > -- John McKown Maranatha! <>< ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu 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 lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
