On Thu, Dec 14, 2017 at 8:47 AM, Peter Hunkeler <p...@gmx.ch> wrote: > > >What does this exactly mean: "freemained frames"? Is it just a counter or > do they refer to specific frames, that are kept at hand in the address > space for faster assignment of new frame requests? > > > >I am not surprised that those frames, if they are "available" at all, are > not accessible anymore and access is punished with the same 0C4 as any > other not getmained frame. > > > See OA46291. The APAR is for z/OS V2.1 and V1.13, it is in the base for > z/OS V2.2. > > > With this new function, RSM (SRM?) may decide *not* to free the frames > that are backing some virtual area upon a STORAGE RELEASE or FREEMAIN. It > is a significant change, IMHO, since a program might continue to > (erroneously) access storage that has been freed but *not* getting an > S0C4-10/11 because the frame is still assigned. Or, it may get an > S0C4-10/11 at some later point if RSM decided to really free some such > frame at a later time. >
Ack! Pooie! If it were possible, I would set up my code so that _any_ access to an address which has not been properly "getmain'd" would _immediately_ S0C4-?? Again, IMO, any access to "unallocated" memory is an "overrun" situation which should be _fixed_ in the code. The previous may be influenced from my study (not use) of the IBMi architecture wherein you simply _cannot_ access something which is not properly allocated. Memory allocation on the IBMi is "weird". > > > I do not want to build on that function to cheat. I'm wondering what > information a dump would reveal in such a case. What would VSM tell me? etc. > > > -- > Peter Hunkeler > > > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > -- I have a theory that it's impossible to prove anything, but I can't prove it. Maranatha! <>< John McKown ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
