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IV99712: SVMON COMMAND CAN CRASH THE SYSTEM APPLIES TO AIX 7200-02

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APAR status

  • Closed as program error.

Error description

  • svmon command can crash the system. It cannot happen all
the time as it requires very narrow timing window to hit
this issue. When it happens, system can crash with the
following stack trace:

CRASH INFORMATION:
CPU 4 CSA F00000002FF47600 at time of crash, error code
for LEDs: 30000000
pvthread+00E700 STACK:
[003B5C18]adsp_idx+000018 (FFFFF0000FF48A28,
000000000000000D [??])
[003B5C90]as_getsrval+000010 (??, ??)
[00027310]vm_handle_xproc+0001B0 (??, ??, ??)
[006F4824]vm_svmon_memplace_usr+0000C4 (??)
[006F53A8]vm_svmon_memplace+000828 (??, ??)
[006F33B4]_vmgetinfo+000834 (??, ??, ??, ??)
[006FCE40]vmgetinfo+000040 (??, ??, ??)
[00003938]syscall+000230 ()
[kdb_get_virtual_memory] no real storage @
FFFFFFFFFFFE110
[100019758]0000000100019758 ()
[kdb_read_mem] no real storage @ FFFFFFFFFFF5D70

Local fix

  • N/A

Problem summary

  • The customer may see a crash with a stack resembling:
 003B5C18 adsp_idx+000018 ()
 003B5C90 as_getsrval+000010 ()
 00027310 vm_handle_xproc+0001B0 ()
 006F4824 vm_svmon_memplace_usr+0000C4 ()
 006F53A8 vm_svmon_memplace+000828 ()
 006F33B4 _vmgetinfo+000834 ()
 006FCE40 vmgetinfo+000040 ()

Problem conclusion

  • The routine vm_handle_xproc has been changed to grab the
pv lock in those cases where the caller doesn't hold it
already.

Temporary fix

  • 



Comments


    

  • 7100-05 - use AIX APAR IV96153
7100-05 - use AIX APAR IV96153
7200-02 - use AIX APAR IV99712

    



APAR Information




    

  • APAR number
    IV99712
    • 

  • Reported component name
    AIX V7.2
    • 

  • Reported component ID
    5765CD200
    • 

  • Reported release
    720
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2017-09-07
    • 

  • Closed date
    2017-09-07
    • 

  • Last modified date
    2018-09-21
    • 





    

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

    
IV96153
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    AIX V7.2
    • 

  • Fixed component ID
    5765CD200
    • 



Applicable component levels


    

  • R720  PSY  U876235
       UP18/03/05  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

              [{"Business Unit":{"code":"BU070","label":"IBM Infrastructure"},"Product":{"code":"SSVEF8","label":"AIX 7.2 Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"720","Edition":"","Line of Business":{"code":"LOB68","label":"Power HW"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SG11S","label":"AIX 7.2 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"720","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            10 September 2025
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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