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MF62858 - LIC-PERF Isolate tasks are too disruptive to other tasks run

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


Order this fix

Abstract

LIC-PERF Isolate tasks are too disruptive to other tasks run


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
TR   5770999  V7R2M0    MF99105   00/00    0000
PRE  5770999  V7R2M0    MF62852   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
delivered with the machine.

SUBJECT TO ANY WARRANTIES WHICH CAN NOT BE EXCLUDED OR EXCEPT AS EXPLICITLY
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INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON INFRINGEMENT,
REGARDING THE PTF.





APAR Error Description / Circumvention

-----------------------------------------------
When a dlpar memory remove occurs it is necessary to make
repetitive calls to the hypervisor so they can verify that no
usage of the memory is occurring.  The code starts tasks to do
these calls, and these tasks can be disruptive to other tasks
that are running on different threads on the same processors.


CORRECTION FOR APAR MA45905 :
-----------------------------
To minimize the disruption to other tasks running in the system
we will have the dlpar memory remove tasks run in their own
workload capping group.

CIRCUMVENTION FOR APAR MA45905 :
--------------------------------
None.


DESCRIPTION OF PROBLEM FIXED FOR APAR MA46030 :
-----------------------------------------------
A function is call during the install that is not available
during that time frame.

CORRECTION FOR APAR MA46030 :
-----------------------------
The code will be correct to not call the function during the
install IPL.

CIRCUMVENTION FOR APAR MA46030 :
--------------------------------
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.............................V7R2M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA45905
View details for APAR MA46030
Superseded by:......................View fix details for PTF MF99109
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C7068720


System i Support

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Document Information

Modified date:
04 January 2017