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IV04902: GENERAL TERABYTE ALIAS IMPROVEMENTS APPLIES TO AIX 6100-06

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APAR status

  • Closed as program error.

Error description

  • The lsa reaper thread, when it runs, has high CPU time.
Also, this fixes an unrelated crash in fork.

Local fix

  • 



Problem summary


    

  • The lsa reaper thread, when it runs, has high CPU time.
Also, this fixes an unrelated crash in fork.

    



Problem conclusion


    

  • Silently, and automatically disable unshared terabyte aliases,
once a sufficient number exist, such that there would be some
system interference by the lsareapr thread. This allows the
system to utilize unshared aliases by default, until some
threshold of their utilization is reached. After that, the
system will automatically and silently disable them, but will
continue to use the pre-existing ones.

For the fork crash, properly handle terabyte segments created
through shmctl() with terabyte aliases.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV04902
    • 

  • Reported component name
    AIX 610 STD EDI
    • 

  • Reported component ID
    5765G6200
    • 

  • Reported release
    610
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2011-08-09
    • 

  • Closed date
    2011-08-09
    • 

  • Last modified date
    2013-04-16
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    
IV03445
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    

  • Fixed component name
    AIX 610 STD EDI
    • 

  • Fixed component ID
    5765G6200
    • 



Applicable component levels


    

  • R610  PSY  U843098
       UP11/10/15  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            16 April 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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