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MA48550 - LIC-OTHER-SRCB6005121-INCORROUT DURING IASP QUIESCE, AN ERROR
OCCURRED DURING TASK CREATION.

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 APAR (Authorized Program Analysis Report)

Abstract

LIC-OTHER-SRCB6005121-INCORROUT DURING IASP QUIESCE, AN ERROR
OCCURRED DURING TASK CREATION.

Error Description

During IASP quiesce, multiple tasks were started to scan for    
changed IASP pages that need to be written out. Code did not    
properly handle a buffer creation event, while running in a    
Critical Section.                                              
                                                               
Avoiding an IASP quiesce (i.e. Vary Off) would avoid the        
exposure.                                                      
                                                               
Service Keywords:                                              
word 1 srcB6005121 B6005121                                    
word 3 src0002000A 0002000A                                    
word 4 src00100013 00100013                                    
                                                               
Task SMCHGPGSCANxx                                              
SmMtChangedPageWriter -> SmMtSeqPageScanner                    

Problem Summary

Please see the ERROR DESCRIPTION section.                      

Problem Conclusion

The code is changed to prevent passing a NULL pointer to a task.
Instead we will run with the tasks that have already been      
started before being unable to allocate a buffer. If the buffer
allocate fails for the first task we are starting we will use  
the existing single threaded IASP quiesce code.                

Temporary Fix

Comments

Circumvention


PTFs Available

R720 MF67696  1084

R730 MF67695  0310

R740 MF67697  1091

Affected Modules


         
         

Affected Publications

Summary Information

Status............................................CLOSED PER
HIPER...........................................No
Component..................................9400DG300
Failing Module..........................RCHMGR
Reported Release...................R730
Duplicate Of..............................




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Document Information

Modified date:
16 April 2021