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MF66136 - LIC-OTHER-WAIT SYSTEM HANG DUE TO WORKLOAD CAPPING

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


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Abstract

LIC-OTHER-WAIT SYSTEM HANG DUE TO WORKLOAD CAPPING


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,
including programs that circumvent control technology designed to limit
interactive capacity to purchased levels.  This PTF may be a prerequisite
for future PTFs.  By applying this PTF you authorize and agree to the
foregoing.

This PTF is subject to the terms of the 'IBM License Agreement for Machine
Code', the terms of which were provided in a printed document that was
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REGARDING THE PTF.





APAR Error Description / Circumvention

-----------------------------------------------
In a busy partition using workload capping groups, the partition
can experience a hang if its configuration includes more than 16
virtual processors.  This is due to workload capping group limit
enforcement.

CORRECTION FOR APAR MA47680 :
-----------------------------
Code has been changed to correctly handle more than 16 virtual
processors with workload capping groups.

CIRCUMVENTION FOR APAR MA47680 :
--------------------------------
Option 1: Do not use workload capping or change workload capping
group limits so that enforcement cannot occur given the LPAR
configuration.
Option 2: For an HMC managed system, change the LPAR
configuration maximum number of virtual processors to 16 or less
and [re]activate the profile.


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..........................  View details for APAR MA47680
Superseded by:......................  View fix details for PTF MF99213
Recompile...........................  N
Library.............................  QSYS
MRI Feature ........................  NONE
Cum Level...........................  C9311730


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Document Information

Modified date:
12 October 2022