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IV33758: POSSIBLE INCREASE IN RANDOM KPROC CPU USAGE. APPLIES TO AIX 6100-07

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APAR status

  • Closed as program error.

Error description

  • Possible increase in random kproc cpu usage;
A typical case is where one thread opens /dev/random, but never
reads from it. Then another thread opens /dev/random when a
privious thread has already opened the /dev/random device,
causing the increased cpu usage by the random kproc.

Local fix

  • 



Problem summary


    

  • Possible increase in random kproc cpu usage;
A typical case is where one thread opens /dev/random, but never
reads from it. Then another thread opens /dev/random when a
privious thread has already opened the /dev/random device,
causing the increased cpu usage by the random kproc.

    



Problem conclusion


    

  • Modified the random device driver' kproc so to handle to case
where a thread may open /dev/random device, but never closes
it.

    



Temporary fix


    

  • 



Comments


    

  • 6100-06 - use AIX APAR IV35111
6100-07 - use AIX APAR IV33758
6100-08 - use AIX APAR IV33227
7100-02 - use AIX APAR IV33239

    



APAR Information




    

  • APAR number
    IV33758
    • 

  • Reported component name
    AIX 610 STD EDI
    • 

  • Reported component ID
    5765G6200
    • 

  • Reported release
    610
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2012-12-19
    • 

  • Closed date
    2012-12-19
    • 

  • Last modified date
    2013-11-25
    • 





    

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

    
IV33203
    

    • 

  • 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  U854611
       UP13/03/22  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            25 November 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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