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IV06630: READVGDA -V3 MAY LOOP APPLIES TO AIX 7100-01

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APAR status

  • Closed as program error.

Error description

  • readvgda -v3 can stuck in a loop causing snap -L
to hang. The procstack command against the looping
readvgda will show the stack:
    0xd0129fdc  free_y(??, ??) + 0x59c
    0xd0127770  free_common(??) + 0xb0
    0xd051ee54  odm_terminate() + 0x494
    0xd051df20  __odm_initfini_fini() + 0x60
    0xd0184e44  mod_fini1(??, ??) + 0xa4
    0xd0184d30  modfini(??) + 0xf0
    0xd01857f4  __modfini() + 0x54
    0xd01890b0  exit(??) + 0x1d0
    0x10000360  sigsegv_handler(??) + 0x40
    <signal>
    0xd0129fdc  free_y(??, ??) + 0x59c
    0xd0127770  free_common(??) + 0xb0
    0xd052cde4  raw_find_obj(??, ??, ??) + 0xce4
    0xd05211c4  odm_get_obj(??, ??, ??, ??) + 0xc4
    0xd0521e30  odm_get_first(??, ??, ??) + 0x70
    0x10002258  check_odm@AF24_6(??, ??, ??, ??) + 0x178
    0x100079b8  display_svg_q_flag(??) + 0x78
    0x100016e8  main(??, ??) + 0x348
    0x10000168  __start() + 0x68

Local fix

  • Kill the looping readvgda process(s)

Problem summary

  • On certain data on disk, readvgda with certain options may hang
if it gets SIGSEGV twice.

Problem conclusion

  • Better handle the seg fault signal handling so that we cannot
hang.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV06630
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2011-08-19
    • 

  • Closed date
    2011-08-19
    • 

  • Last modified date
    2013-02-21
    • 





    

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

    
IV03339
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    AIX V7.1
    • 

  • Fixed component ID
    5765H4000
    • 



Applicable component levels


    

  • R710  PSY  U840884
       UP12/05/11  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

              [{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSMV87","label":"AIX 6.1 Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSMVAX","label":"AIX Express Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11R","label":"AIX 7.1 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"","label":""}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            21 February 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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