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IZ98126: SEA/VIO CLIENT HANG - INTERRUPTS DO NOT REACH THE TRUNK ADAPTER APPLIES TO AIX 5300-12

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APAR status

  • Closed as program error.

Error description

  • A VIOS Server will not forward traffic from its VIO
Clients
to the external network.

Packets from the VIO Client travel to the hypervisor
(phype)
but the packets are dropped by the hypervisor as it
attempts
to deliver the packet to the VIOServer's trunk adapter.
The hypervisor will have dropped the packets because
there
are no buffers to place the data in. On the VIOServer,
interrupts are not activating the trunk adapter to read
and
remove data from its buffers. This results in having full
buffers at the trunk adapter.

Since the trunk adapter's buffers are full, phype cannot
deliver the data and so VIO Clients cannot get packets
through the SEA adapter and out to the network.

The problem was discovered on P7 systems where Vlans on
the SEA are used.

"Hypervisor Receive" errors on the trunk adapter will
increase as this problem occurs and the VIO Clients are
not able to reach the outside network.

Local fix

  • 



Problem summary


    

  • Unresponsive VIO Clients with traffice not forwarded to
external network.

    



Problem conclusion


    

  • Ensure proper locking around receive scheduling operations.

    



Temporary fix


    

  • 



Comments


    

  • 5300-11 - use AIX APAR IZ98424
5300-12 - use AIX APAR IZ98126
6100-04 - use AIX APAR IZ97605
6100-05 - use AIX APAR IZ97457
6100-06 - use AIX APAR IZ96155
7100-00 - use AIX APAR IZ97035

    



APAR Information




    

  • APAR number
    IZ98126
    • 

  • Reported component name
    AIX  5.3
    • 

  • Reported component ID
    5765G0300
    • 

  • Reported release
    530
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2011-04-04
    • 

  • Closed date
    2011-04-04
    • 

  • Last modified date
    2013-04-16
    • 





    

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

    
IZ96155
    

    • 

  • 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  U841199
       UP11/06/16  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

              [{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11P","label":"APARs - AIX 5.3 environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"530","Edition":"","Line of Business":{"code":"","label":""}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            16 April 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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