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IZ86985: MACHINE CRASHED @ UNMOUNT_AUTOFS, ABEND_TRAP APPLIES TO AIX 6100-06

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APAR status

  • Closed as program error.

Error description

  • autofs client machine crash during automatical unmount when
the ras level is normal or above. The stack trace looks like
(0)> where
pvthread+01AC00 STACK:
￭0001BF00abend_trap+000000 ()
￭F1000000B043C164unmount_autofs+0000C4 (??)
￭F1000000B0438014unmount_tree+0009D4 ()
￭00014D70.hkey_legacy_gate+00004C ()
￭00267F94threadentry+000094 (??, ??, ??, ??)
￭kdb_read_mem no real storage @ FFFFFFFFFFF9270

Local fix

  • 



Problem summary


    

  • autofs client machine crash during automatical unmount when
the ras level is normal or above. The stack trace looks like
(0)> where
pvthread+01AC00 STACK:
 0001BF00 abend_trap+000000 ()
 F1000000B043C164 unmount_autofs+0000C4 (??)
 F1000000B0438014 unmount_tree+0009D4 ()
 00014D70 .hkey_legacy_gate+00004C ()
 00267F94 threadentry+000094 (??, ??, ??, ??)
 kdb_read_mem  no real storage @ FFFFFFFFFFF9270

    



Problem conclusion


    

  • rework the fix for 766305. The fix for 766305 remove the
VN_RELE() before calling auto_inkernel_unmount() but in
auto_inkernel_unmount() because of that extra rele, it
will disconnect the stub. Which will result in system
crashes. So the solution is to rework the fix so it
will mark the object directory that we are in the middle
of unmount by the aump thread. So auto_inkernel_unmount()
will react correctly

    



Temporary fix


    

  • 



Comments


    

  • 6100-04 - use AIX APAR IZ86071
6100-05 - use AIX APAR IZ86070
6100-06 - use AIX APAR IZ86069
6100-06 - use AIX APAR IZ86985
7100-00 - use AIX APAR IZ86421

    



APAR Information




    

  • APAR number
    IZ86985
    • 

  • Reported component name
    AIX 610 STD EDI
    • 

  • Reported component ID
    5765G6200
    • 

  • Reported release
    610
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2010-10-19
    • 

  • Closed date
    2010-10-19
    • 

  • Last modified date
    2013-04-17
    • 





    

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

    
IZ86069
    

    • 

  • 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  U835918
       UP11/05/10  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            17 April 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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