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IV17224: GSCLVMD CORES ON EXTENDING LV MAPPED TO MORE THAN 128 DISKS APPLIES TO AIX 6100-07

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APAR status

  • Closed as program error.

Error description

  • The gsclvmd daemon may core dump due to stack corruption
while
processing an extend/reduce request of a logical volume
belonging
to a scalable volume group when the logical volume is
mapped to
more than 128 disks.

Error log from the core dump shows incomplete stack due
to stack corruption:

LABEL:          CORE_DUMP
IDENTIFIER:     A924A5FC

Date/Time:       Thu Dec 15 09:24:30 2011
Sequence Number: 15917
Machine Id:      00F65C294C00
Node Id:         epcsgf21
Class:           S
Type:            PERM
WPAR:            Global
Resource Name:   SYSPROC

COME FROM ADDRESS REGISTER
gs_reduce 6A0

PROCESSOR ID
  hw_fru_id: 3
  hw_cpu_id: 31

ADDITIONAL INFORMATION
??
??
Unable to generate symptom string.

Local fix

  • Logical volumes should be mapped to less than 128 disks.

Problem summary

  • gsclvmd daemon code to handle extending an LV does not
correctly handle when an LV is mapped to more than 128 disks.
In this case, process stack is messed up and various results
can happen, most likely core dump of gsclvmd daemon.

Problem conclusion

  • Allocate enough space in gsclvmd for it to handle LVs on more
than 128 disks.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV17224
    • 

  • Reported component name
    AIX 610 STD EDI
    • 

  • Reported component ID
    5765G6200
    • 

  • Reported release
    610
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2012-03-13
    • 

  • Closed date
    2012-03-13
    • 

  • Last modified date
    2013-02-26
    • 





    

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

    
IV16659
    

    • 

  • 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  U839540
       UP12/05/11  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            26 February 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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