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MF65818 - LIC QPFRADJ hangs during main storage pool adjustment.

PTF ( Program Temporary Fixes ) Cover letter


Order this fix

Abstract

LIC QPFRADJ hangs during main storage pool adjustment.


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
TR   5770999  V7R3M0    MF99206   00/00    0000



NOTICE:
-------
Application of this PTF may disable or render ineffective programs that
use system memory addresses not generated by the IBM translator,
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APAR Error Description / Circumvention

-----------------------------------------------
When shrinking small memory pools on systems with large amounts
of mainstore QPFRADJ may not complete.  The system code trying
to move main storage pages from the pool will loop.  All nodes
of memory in the pool being reduced will have less than 10 4k
pages in them, and all the pages in the nodes will be on the
unused list.

CORRECTION FOR APAR MA47553 :
-----------------------------
Due to the large memory size of the partition, and the small
size of the pool being shrunk, a rounding error in the code is
causing it to incorrectly assume all pages left to move are on
the available list.  Since all pages are on the unused list, no
pages are moved.  The code is corrected by detecting this
condition, and moving the unused pages from the pool.

CIRCUMVENTION FOR APAR MA47553 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


None.


Default Instructions

THIS IS A DELAYED PTF TO BE APPLIED AT IPL TIME.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
     NONE

Summary Information

System.............................. i
Models..............................
Release............................. V7R3M0
Licensed Program............... 5770999
APAR Fixed.......................... MA47553
Superseded by:......................
Recompile........................... N
Library............................. QSYS
MRI Feature ........................ NONE
Cum Level........................... NONE


System i Support

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Document information

More support for: i family

Software version: V7R3M0

Operating system(s): OS/400

Reference #: MF65818

Modified date: 01 April 2019