In a recent note, Chase, John said: > Date: Thu, 10 Nov 2005 12:11:03 -0600 > > > -----Original Message----- > > From: IBM Mainframe Discussion List On Behalf Of Skip Robinson > > > > By all means *start* your 64-bit testing on the most > > disposable LPAR you have regardless of size. However, certain > > 64-bit problems *will not* show up in an LPAR that has less > > than 2 gig of memory. Before going to production in a >2 gig > > LPAR, you must somehow build a large test LPAR if only > > temporarily. Otherwise you may be in for some nasty surprises. > > Isn't there a "twilight zone" between 2 GiBi and 4 GiBi? or does that apply > only to virtual storage? > I'd guess the "twilight zone" is virtual; I'd hope the system design wouldn't squander 2 GiB of real storage (or are the sockets between 2GiB and 4GiB simply left empty; no DIMMs installed?)
Does something, then, have a problem with real addresses with the sign bit set? What? What software is so concerned with real addresses other than OS memory management, which should have been thoroughly tested at other sites by now? -- gil -- StorageTek INFORMATION made POWERFUL ---------------------------------------------------------------------- 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
