IZ72779: ACTIVE MEMORY EXPANSION CRASH DURING CPU TOPOLOGY CHANGE. APPLIES TO AIX 6100-05

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The LPAR must meet the following conditions:
  1. AME enabled
  2. Enhanced Affinity enabled
  3. CPU topology event very recently occurred.
  
  A stack similar to the following:
  ￭0001BEE0abend_trap+000000 ()
  ￭0014DBB4v_cmem_chk_space+0000F4 (??, ??)
  ￭00350EE8v_pf_dodisk+000108 (??, ??, ??, ??)
  ￭0034D1BCv_wpagein+000E9C (??, ??, ??, ??, ??, ??)
  ￭003568F4v_pagein+000194 (??, ??, ??, ??, ??, ??)
  ￭00383330pfget+0007B0 (??, ??, ??, ??, ??, ??)
  ￭003D0EBCv_pfget+00071C (??, ??, ??, ??, ??, ??)
  ￭003FE338state_save_ret+000528 ()
  

Local fix

Problem summary

• The LPAR must meet the following conditions:
  1. AME enabled
  2. Enhanced Affinity enabled
  3. CPU topology event very recently occurred.
  
  A stack similar to the following:
   0001BEE0 abend_trap+000000 ()
   0014DBB4 v_cmem_chk_space+0000F4 (??, ??)
   00350EE8 v_pf_dodisk+000108 (??, ??, ??, ??)
   0034D1BC v_wpagein+000E9C (??, ??, ??, ??, ??, ??)
   003568F4 v_pagein+000194 (??, ??, ??, ??, ??, ??)
   00383330 pfget+0007B0 (??, ??, ??, ??, ??, ??)
   003D0EBC v_pfget+00071C (??, ??, ??, ??, ??, ??)
   003FE338 state_save_ret+000528 ()
  

Problem conclusion

• Harden AME's ability to deal with CPU topology changes.
  

Temporary fix

Comments

APAR Information

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

  IZ72707

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

Fix information

• Fixed component name

  AIX 610 STD EDI

• Fixed component ID

  5765G6200

Applicable component levels

• R610 PSY U823574

     UP10/04/27 I 1000

PTF to Fileset Mapping

• U823574 bos.mp64 6.1.5.0