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IV95541: SYSTEM CRASH IN XMFREE_BACKEND()

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APAR status

  • Closed as program error.

Error description

  • System crash with following stack:
(4)> f
pvthread+081800 STACK:
[00024BE0]abend_trap+000000 ()
[000873CC]xmfree_backend+0000EC (000000000000000C,
F100011500000000,
   000000000FFFFFFF, 0000000000000000, F00000002FF47600)
[000884C0]xmfree+0002C0 (??, ??)
[00087F64]xmalloc_free_chain+0003E4 (??, ??, ??, ??)
[00089FA8]rec_free+000068 (??)
[00089700]xmdbg_do_xmfree_record+0004E0
(F1000815B016E9B0, F1000012A0000000,
   0000000000379220, 0000000006274EE0, F1000815B016E9B0)
[0008859C]xmfree+00039C (??, ??)
[003794BC]dioIODone+00023C (??)
[002C29C4]percpu_iodone_offl+0000E4 (??)
[002C22A4]iodone_offl+0000E4 ()
[002BEFBC]i_softmod+0003FC ()
[001B0338]flih_util+000258 ()

Local fix

  • 



Problem summary


    

  • SYSTEM CRASH IN XMFREE_BACKEND()
System crash with following stack:
(4)> f
pvthread+081800 STACK:
 00024BE0 abend_trap+000000 ()
 000873CC xmfree_backend+0000EC (000000000000000C,
F100011500000000,
   000000000FFFFFFF, 0000000000000000, F00000002FF47600)
 000884C0 xmfree+0002C0 (??, ??)
 00087F64 xmalloc_free_chain+0003E4 (??, ??, ??, ??)
 00089FA8 rec_free+000068 (??)
 00089700 xmdbg_do_xmfree_record+0004E0
(F1000815B016E9B0, F1000012A0000000,
   0000000000379220, 0000000006274EE0, F1000815B016E9B0)
 0008859C xmfree+00039C (??, ??)
 003794BC dioIODone+00023C (??)
 002C29C4 percpu_iodone_offl+0000E4 (??)
 002C22A4 iodone_offl+0000E4 ()
 002BEFBC i_softmod+0003FC ()
 001B0338 flih_util+000258 ()

    



Problem conclusion


    

  • Allocate cache to the new sub-heap

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV95541
    • 

  • Reported component name
    AIX V7.2
    • 

  • Reported component ID
    5765CD200
    • 

  • Reported release
    720
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2017-04-28
    • 

  • Closed date
    2017-04-28
    • 

  • Last modified date
    2017-10-12
    • 





    

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

    
IV94810
    

    • 

  • 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":"BU070","label":"IBM Infrastructure"},"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":"LOB68","label":"Power HW"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure 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":"LOB08","label":"Cognitive Systems"}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            10 September 2025
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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