IJ54417: DSI IN DISPATCH() DUE TO INCONSISTENCIES IN THE THREAD STRUCTUREAPPLIES TO AIX 7300-02

APAR status

• Closed as program error.

Error description

• Crash with following stack:
  
  CRASH INFORMATION:
  CPU 16 CSA F100091560516D00 at time of crash, error code
  for LEDs: 30000000
  pvthread+082F00 STACK:
  [0009DB38]dispatch+002AF8 (0000000000C00000,
  0000000003A10170,
     0000000003A10000 [??])
  [00144E34]flih_util+00043C ()
  ____ Exception (F00000002FF47600) ____
  
  Error id               =  DSI_PROC
  Exception DSISR/ISISR  =  0000000040000000
  Exception srval        =  00007FFFFFFFD080
  Exception virt addr    =  0000000004610170
  Exception value        =  00000115
  EXCEPT_DISABLED_PFAULT
  

Local fix

• This is a very rare timing issue that can be avoided by
  stopping aso as it can happen only when aso is running.
  

Problem summary

• system crash due to DSI dispatch
  This resulted in system crash with following stack:
  CRASH INFORMATION:
  CPU 16 CSA F100091560516D00 at time of crash, error code
  for LEDs: 30000000
  pvthread+082F00 STACK:
   0009DB38 dispatch+002AF8 (0000000000C00000,
  0000000003A10170,
  0000000003A10000  ?? )
   00144E34 flih_util+00043C ()
  

Problem conclusion

• Proper synchronization before updating thread flags
  

Temporary fix

Comments

APAR Information

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

  IJ53486

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

Fix information

• Fixed component name

  AIX V7.3

• Fixed component ID

  5765CD300

Applicable component levels