IV03936: HEA - CRASH IN TSTOP APPLIES TO AIX 5300-12

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• system crash:
  
  pvthread+000100 STACK:
  [00009378].unlock_enable_mem+00006C ()
  [0004EA34]tstop+000230 (??)
  [02697E7C]headd:rx_handler+0001FC (??, ??, ??)
  [0269EEDC]headd:hea_eq_intr+0002C0 (??)
  [00113A4C]i_poll_soft+000138 (??)
  [00113598]i_softmod+000360 ()
  [00040614].finish_interrupt+000018 (??, ??)
  

Local fix

Problem summary

• Machine crash and in KDB.
  

Problem conclusion

• we are cancelling the timer request but we are not checking
  the return code as opposed to taking the approrpiate action in
  case of failure.Moreover as we are using the lock, lock shoul
  d be released ,a delay should be added and then the lock shoul
  d be reacquired .In a multiprocessor environment, the timer
  function associated with a timer request block may be active
  on another processor when the tstop kernel service is called.
  In case, the timer request cannot be canceled,A multiprocessor
  -safe driver must therefore check the return code and take
  appropriate action if the cancel request failed.
  

Temporary fix

Comments

• 5300-12 - use AIX APAR IV03936
  6100-05 - use AIX APAR IZ81263
  6100-06 - use AIX APAR IZ81264
  6100-06 - use AIX APAR IZ81265
  7100-00 - use AIX APAR IZ89077
  

APAR Information

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

  IZ77328

• 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 U844643

     11/10/10 I 1000

PTF to Fileset Mapping

• U844643 devices.chrp.IBM.lhea.rte 5.3.12.3