IV64638: SYSTEM HANG IN PRUBLOCKSEGATTACH APPLIES TO AIX 7100-03

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• System hang in:
  
  [00009938].simple_unlock_mem+000020 ()
  [000F239C]e_block_thread+00049C ()
  [000F2D08]e_sleep_thread+0000E8 (??, ??, ??)
  [000ECDA8]prUblockSegAttach+000048 (??, ??)
  [0043CD34]prGetPsinfo+0005F4 (??, ??, ??)
  [0043CEE8]prReadPsinfo+000168 (??, ??, ??, ??, ??, ??,
  ??, ??)
  [00439B78]procfsRdwr+0001D8 (??, ??, ??, ??, ??, ??, ??,
  ??)
  [006009F4]vnop_rdwr+000814 (??, ??, ??, ??, ??, ??, ??,
  ??)
  [00619AB4]vno_rw+0000B4 (??, ??, ??, ??, ??)
  [005AF020]rwuio+000100 (??, ??, ??, ??, ??, ??)
  [005AFA60]fp_rdwr+000160 (??, ??, ??, ??, ??, ??, ??, ??)
  [005B03D4]fp_read+000034 (??, ??, ??, ??, ??, ??)
  [0536BB88]amf_get_psinfo+000160 (??, ??)
  [0536BC7C]amf_s_proff_pid_monitor+000068 (??)
  [0536B7EC]amf_prexec_hook+000088 (??, ??, ??)
  [000E9188]prochcall+000268 (??, ??, ??, ??)
  [0048FA58]execvex_common+0022D8 (??, ??, ??, ??, ??)
  [00492F8C]execve+0000A8 ()
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:
  * Systems running the 7100-03 Technology Level with bos.mp64
  * at or between 7.1.3.15 and 7.1.3.31
  ****************************************************************
  * PROBLEM DESCRIPTION:
  * System hang in:
  *  00009938 .simple_unlock_mem+000020 ()
  *  000F239C e_block_thread+00049C ()
  *  000F2D08 e_sleep_thread+0000E8 (??, ??, ??)
  *  000ECDA8 prUblockSegAttach+000048 (??, ??)
  *  0043CD34 prGetPsinfo+0005F4 (??, ??, ??)
  *  0043CEE8 prReadPsinfo+000168 (??, ??, ??, ??, ??, ??,
  * ??, ??)
  *  00439B78 procfsRdwr+0001D8 (??, ??, ??, ??, ??, ??, ??,
  * ??)
  *  006009F4 vnop_rdwr+000814 (??, ??, ??, ??, ??, ??, ??,
  * ??)
  *  00619AB4 vno_rw+0000B4 (??, ??, ??, ??, ??)
  *  005AF020 rwuio+000100 (??, ??, ??, ??, ??, ??)
  *  005AFA60 fp_rdwr+000160 (??, ??, ??, ??, ??, ??, ??, ??)
  *  005B03D4 fp_read+000034 (??, ??, ??, ??, ??, ??)
  *  0536BB88 amf_get_psinfo+000160 (??, ??)
  *  0536BC7C amf_s_proff_pid_monitor+000068 (??)
  *  0536B7EC amf_prexec_hook+000088 (??, ??, ??)
  *  000E9188 prochcall+000268 (??, ??, ??, ??)
  *  0048FA58 execvex_common+0022D8 (??, ??, ??, ??, ??)
  *  00492F8C execve+0000A8 ()
  ****************************************************************
  * RECOMMENDATION:
  * Install APAR IV64638.
  ****************************************************************
  

Problem conclusion

• Fixed the issue in such a way that the there will be no system
  hang if a process tries to get psinfo on it self.This is done
  by not to sleep for exec event completion if current process
  is trying to get psinfo on it self.
  

Temporary fix

Comments

• 7100-03 - use AIX APAR IV64638
  

APAR Information

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

  IV63274

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

Fix information

• Fixed component name

  AIX V7.1

• Fixed component ID

  5765H4000

Applicable component levels

• R710 PSY U865837

     UP15/05/19 I 1000

PTF to Fileset Mapping

• U865837 bos.mp64 7.1.3.45