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MF65405 - IPL-SRCC6004052-WAIT IPL HANGS AT C6004052

PTF ( Program Temporary Fixes ) Cover letter


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Abstract

IPL-SRCC6004052-WAIT IPL HANGS AT C6004052


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
NONE



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.

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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON INFRINGEMENT,
REGARDING THE PTF.


APAR Error Description / Circumvention

-------------------------------------------------
During a partition IPL, the system hangs at SRCC6004052 which is
during Trace initialization.

CORRECTION FOR APAR 'MA47313' :
-------------------------------
In the trace system control block there is a list of LIC trace
definition tables and their control segments. One control
segment was either corrupt or had been destroyed but not removed
from the table list. During the IPL, the LIC Trace code tries to
verify the list of trace tables and cleanup any bad trace
definition tables by removing the segment pointer from the trace
system control block. The trace code tries to get a exclusive
gate lock on the trace system control block, but the control
block already has a shared lock. The trace code tries to wait
for the exclusive lock but the shared lock is never released.
The LIC code doesn't have a method to convert the shared lock
into an exclusive lock.

The LIC Trace code was changed to remove the shared lock before
calling the delete code.
The LIC Trace code is then able to get the exclusive lock on the
trace system control block and complete the clean up.

CIRCUMVENTION FOR APAR 'MA47313' :
----------------------------------
None.


Activation Instructions

None.




Special Instructions

None.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF63811      OSP-WAIT after trace task (SFTR) crashes
   MF60507      IPL-SRCC6004052 Trace initialization failed.

Summary Information

System.............................. i
Models..............................
Release............................. V7R2M0
Licensed Program............... 5770999
APAR Fixed.......................... View details for APAR MA47313
Superseded by:...................... View fix details for PTF MF65646
Recompile........................... N
Library............................. QSYS
MRI Feature ........................ NONE
Cum Level........................... C9123720


System i Support

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Document information

More support for: i family

Software version: V7R2M0

Operating system(s): OS/400

Reference #: MF65405

Modified date: 20 November 2018