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IV02467: SYSTEM CRASH WITH PSMD AFTER DLPAR MEMORY ADD OPERATION APPLIES TO AIX 6100-07

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APAR status

  • Closed as program error.

Error description

  • System crash with a page size managment daemon (PSMD) in the
following stack trace:

￭00022080abend_trap+000000 () ￭0005C370v_insfree+000690 (??,
??) ￭0002C800begfst+00018C () ____ Exception
(F00000003004D600) ____
...base mst data...
￭0004C324vm_psmd_flush_pending+000204 (F1000F0009540700,
0000000000000001, FFFFFFFFFFFFF358 ￭??)
￭00052C1Cvm_psmd_promote@AF230_44+00029C (??, ??, ??, ??, ??)
￭0004DD40psmd_kthread+0002C0 (??)

and another CPU running vmmd kernel thread in the following
stack trace:

￭0005560Cv_zerofree+0000EC (0000000000000000, 0000000000000000
￭??) ￭0002C534.backt+000158 () ____ Exception
(F0000000300E9600) ____
...base mst data...
￭0002C3DC.backt+000000 () ￭0002DA6C.vcs_zerofree_excp+000020
() ￭00221F20vm_zerofree_lmb+000040 (??)
￭00264E88threadentry+000088 (??, ??, ??, ??)

Local fix

  • 



Problem summary


    

  • System crash with a page size managment daemon (PSMD) in the
following stack trace:
.
 00022080 abend_trap+000000 ()  0005C370 v_insfree+000690 (??,
??)  0002C800 begfst+00018C () ____ Exception
(F00000003004D600) ____
...base mst data...
 0004C324 vm_psmd_flush_pending+000204 (F1000F0009540700,
                      0000000000000001, FFFFFFFFFFFFF358  ?? )
 00052C1C vm_psmd_promote@AF230_44+00029C (??, ??, ??, ??, ??)
 0004DD40 psmd_kthread+0002C0 (??)
.
and another CPU running vmmd kernel thread in the following
stack trace:
.
 0005560C v_zerofree+0000EC (0000000000000000, 0000000000000000
 ?? )  0002C534 .backt+000158 () ____ Exception
(F0000000300E9600) ____
...base mst data...
 0002C3DC .backt+000000 ()  0002DA6C .vcs_zerofree_excp+000020
()  00221F20 vm_zerofree_lmb+000040 (??)
 00264E88 threadentry+000088 (??, ??, ??, ??)

    



Problem conclusion


    

  • Add a new VMM critical section to the PSMD code to update
page size state information.
Change the v_zerofree VMM critical section to scrutinize page
state more carefully before deciding on a course of action and
rescaning/aborting if it detects page state changes.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV02467
    • 

  • Reported component name
    AIX 610 STD EDI
    • 

  • Reported component ID
    5765G6200
    • 

  • Reported release
    610
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2011-06-28
    • 

  • Closed date
    2011-06-28
    • 

  • Last modified date
    2013-04-07
    • 





    

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

    
IV01748
    

    • 

  • 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  U838167
       UP11/10/20  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            07 April 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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