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MA47680 - LIC-OTHER-WAIT SYSTEM HANG DUE TO WORKLOAD CAPPING

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 APAR (Authorized Program Analysis Report)

Abstract

LIC-OTHER-WAIT SYSTEM HANG DUE TO WORKLOAD CAPPING

Error Description

MSD shows task RMTMSAFETASK waiting on a gate that was held by  
another task that appeared to have released the gate, but was  
not being dispatched. Dispatching issue is related to workload  
capping groups.                                                

Problem Summary

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.                                                    

Problem Conclusion

Code has been changed to correctly handle more than 16 virtual  
processors with workload capping groups.                        

Temporary Fix

Comments

Circumvention


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.                                  

PTFs Available

R720 MF66135 PTF Cover Letter   9297
R730 MF66136 PTF Cover Letter   9311
R740 MF66137 PTF Cover Letter   9304

Affected Modules

         
         

Affected Publications

Summary Information

Status............................................ CLOSED PER
HIPER........................................... Yes
Component.................................. 9400DG300
Failing Module.......................... RCHMGR
Reported Release................... R720
Duplicate Of..............................




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Document Information

Modified date:
16 November 2019