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IV67208: SETTING RECEIVE_Q_ELEM HIGH ON CT3 REDRIVER MAKES IFCONFIG HANG APPLIES TO AIX 7100-03

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APAR status

  • Closed as program error.

Error description

  • Setting "receive_q_elem" to a high value on the CT3
(RedRiver) adapter causes a hang in ifconfig. The hang is
caused because the memory requested by the adapter is
bigger than a heap segment (256MB).

The hang can occur during ifconfig at bootup (causing a
boot
hang) or when running ifconfig is done at the command
line
after changing the variable to a high value.

Local fix

  • The workaround for this problem is to leave
"receive_q_elem" at its default value of 4096.

Values higher than 19,0000 are expected to cause the
hang.

Problem summary

  • Setting "receive_q_elem" to a high value bigger than a heap
segment (256MB)on the CT3 (RedRiver) adapter causes a hang
in ifconfig.

Problem conclusion

  • Correct the netmalloc code such that ifconfig will not hang,
when memory requested by the adapter is bigger than a
heap segment (256MB)

Temporary fix

  • 



Comments


    

  • 6100-08 - use AIX APAR IV70724
6100-09 - use AIX APAR IV68001
7100-02 - use AIX APAR IV66673
7100-03 - use AIX APAR IV67208

    



APAR Information




    

  • APAR number
    IV67208
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2014-11-21
    • 

  • Closed date
    2014-11-21
    • 

  • Last modified date
    2015-09-30
    • 





    

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

    
IV66673
    

    • 

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

    
IV68069
    

    • 



Fix information


    

  • Fixed component name
    AIX V7.1
    • 

  • Fixed component ID
    5765H4000
    • 



Applicable component levels


    

  • R710  PSY  U865837
       UP15/05/19  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            30 September 2015
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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