IV48042: Crash in vm_cmem_get_cop_prop after dlpar_cpu_add on AME system APPLIES TO AIX 7100-01

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• On systems with AME (Active Memory Expansion) enabled,
  using any expansion factor (including 1.0), after an LPM
  or Hibernation/Resume is performed from a Power7 to
  Power7+, then a DLPAR CPU add is done, the system may
  crash with the following stack:
  00022080 abend_trap+000000 ()
  0011EF0C vm_cmem_get_cop_prop+00028C (??, ??)
  00129708 vm_cmem_prep_hw_assist+000148 ()
  001276F8 vm_cmem_dlpar_handler+000098 (??, ??, ??, ??)
  0023B51C invoke_reconfig_handlers_reentrant+00055C (??,
  ??, ??)
  006072C8 run_notify+000108 (??, ??)
  006091E0 _dr_notify+000340 (??, ??, ??, ??)
  000038A4 mfspurr_sc_flih01+0000E4 ()
  kdb_get_virtual_memory  no real storage @ 2FF22868
  1000C964 1000C964 ()
  

Local fix

• System will reboot
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:
  * Systems running the 7100-01 Technology Level with
  * bos.mp64 between and including the 7.1.1.15 and 7.1.1.19
  * levels.
  ****************************************************************
  * PROBLEM DESCRIPTION:
  * On systems with AME (Active Memory Expansion) enabled,
  * using any expansion factor (including 1.0), after an LPM
  * or Hibernation/Resume is performed from a Power7 to
  * Power7+, then a DLPAR CPU add is done, the system may
  * crash with the following stack:
  *  00022080 abend_trap+000000 ()
  *  0011EF0C vm_cmem_get_cop_prop+00028C (??, ??)
  *  00129708 vm_cmem_prep_hw_assist+000148 ()
  *  001276F8 vm_cmem_dlpar_handler+000098 (??, ??, ??, ??)
  *  0023B51C invoke_reconfig_handlers_reentrant+00055C (??,
  * ??, ??)
  *  006072C8 run_notify+000108 (??, ??)
  *  006091E0 _dr_notify+000340 (??, ??, ??, ??)
  *  000038A4 mfspurr_sc_flih01+0000E4 ()
  *  kdb_get_virtual_memory  no real storage @ 2FF22868
  *  1000C964 1000C964 ()
  ****************************************************************
  * RECOMMENDATION:
  * Install APAR IV48042.
  * Prior to fix availability, an interim fix is available from
  * ftp://public.dhe.ibm.com/aix/ifixes/iv48042/
  ****************************************************************
  

Problem conclusion

• The AME dr event handler needs to be configured with the
  right events.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

  IV46246

• 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 U860252

     UP14/02/14 I 1000 ®

PTF to Fileset Mapping

• U860252 bos.mp64 7.1.1.20

• U860252 bos.mp64 7.1.1.20