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IV94792: SYSTEM CRASH IN IUNLINKZOMBIE

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APAR status

  • Closed as program error.

Error description

  • System crash with stack trace:
(0)> f
pvthread+08A400 STACK:
[003E4728]iUnlinkZombie+0000A8 (F1000A02A15A0880,
                                F1000A000020D980 [??])
[003E3B68]zombieGarbageXT+000048 (??)
[003E38D0]zombieGarbageTrunc+0000D0 (??, ??, ??)
[002EA670]procentry+000010 (??, ??, ??, ??)

Also, register r3 points to a VCHR (or VBLK)
device inode:
(0)> i2 @r3
    ADDRESS           DEVICE      I_NUM/FS  COUNT TYPE
  FLAGS
F1000A02A15A0880 8000000A00000004 137155/16 00001 VCHR

Local fix

  • 



Problem summary


    

  • A system crash with the stack:
 003E4728 iUnlinkZombie+0000A8 (...)
 003E3B68 zombieGarbageXT+000048 (..)
 003E38D0 zombieGarbageTrunc+0000D0 (...)
 002EA670 procentry+000010 (...)

Note that if data corruption occurs, this may manifest itself
in unpredictable ways.

    



Problem conclusion


    

  • Delay the queueing of the zombie inode to the cach720 t
until the garbage collector has processed it.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV94792
    • 

  • Reported component name
    AIX V7.2
    • 

  • Reported component ID
    5765CD200
    • 

  • Reported release
    720
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2017-04-04
    • 

  • Closed date
    2017-04-04
    • 

  • Last modified date
    2017-10-12
    • 





    

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

    
IV93320
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    AIX V7.2
    • 

  • Fixed component ID
    5765CD200
    • 



Applicable component levels


    

  • R720  PSY  U869946
       UP17/10/12  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

              [{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSVEF8","label":"AIX 7.2 Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"720","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11S","label":"AIX 7.2 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"720","Edition":"","Line of Business":{"code":"","label":""}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            12 October 2017
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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