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IV04250: PANIC DUE TO STACK OVERRUN WHEN USING DLPI APPLIES TO AIX 5300-12

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APAR status

  • Closed as program error.

Error description

  • Sometimes when using dlpi, a receive interrupt and
processing of the receive queues can nest deep enough to
overrun the space allocated for the interrupt stack.

The stack will be very long but is sometimes obscured
because a panic is hit in call_v_adspace_switch.  The
stack will have several calls to dlpirsrv, sq_wrapper,
csq_run, csq_turnover, and csq_lateral.

Local fix

  • 



Problem summary


    

  • Customer would experience a system crash.

    



Problem conclusion


    

  • Appropriate code changes made to include a new option in the
/etc/dlpi.conf to make dlpi run to spec. After this APAR is
applied, by default we will run NOTTOSPEC.

A sample line would be:

d+      dlpi    tr,s,r       /dev/dlpi/tr

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV04250
    • 

  • Reported component name
    AIX  5.3
    • 

  • Reported component ID
    5765G0300
    • 

  • Reported release
    530
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2011-08-03
    • 

  • Closed date
    2011-08-03
    • 

  • Last modified date
    2013-04-07
    • 





    

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

    
IV00700
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    AIX  5.3
    • 

  • Fixed component ID
    5765G0300
    • 



Applicable component levels


    

  • R530  PSY  U844672
       UP11/10/10  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            07 April 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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