You are correct, it is only PLPA that does not get paged out when
frames are stolen.  I plead "senior moment". 


Jim Mulder z/OS Diagnosis, Design, Development, Test  IBM Corp. 
Poughkeepsie NY


"IBM Mainframe Discussion List" <IBM-MAIN@LISTSERV.UA.EDU> wrote on 
08/09/2019 12:18:17 PM:

> From: "Seymour J Metz" <sme...@gmu.edu>
> To: IBM-MAIN@LISTSERV.UA.EDU
> Date: 08/09/2019 02:32 PM
> Subject: Re: LOADing a module into common storage
> Sent by: "IBM Mainframe Discussion List" <IBM-MAIN@LISTSERV.UA.EDU>
> 
> When did that change? It used to be that MLPA was subject to pageout.
> 
> 
> --
> Shmuel (Seymour J.) Metz
> http://mason.gmu.edu/~smetz3
> 
> ________________________________________
> From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on 
> behalf of Jim Mulder <d10j...@us.ibm.com>
> Sent: Friday, August 9, 2019 12:12 PM
> To: IBM-MAIN@LISTSERV.UA.EDU
> Subject: Re: LOADing a module into common storage
> 
>   Stores into unfixed static PLPA/MLPA are lost if a frame is stolen,
> because RSM
> recognizes the address ranges of  static PLPA/MLPA and treats them
> differently.
> 
>  Dynamic LPA processing loads the modules into ordinary CSA storage. RSM
> knows nothing about Dynamic LPA, so stores into Dynamic LPA are not lost
> if
> the frame is stolen.
> 
> Jim Mulder z/OS Diagnosis, Design, Development, Test  IBM Corp.
> Poughkeepsie NY
> 
> > It's not so much the storing that's the problem; I understood that an
> LPA
> > module that's marked REFR (and maybe just RENT) doesn't need to be 
paged
> > out, and so my store might be silently lost. Probably I have this 
wrong,
> > that is, if the change bit is on in a page it *will* be paged out if 
the
> > frame is needed.
> 
> 
> 
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