IZ85840: CHVG -G CRASHES SYSTEM IN XM_GFL_EVENT APPLIES TO AIX 6100-06

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• chvg -g crashes the system with the following stack:
  
  CRASH INFORMATION:
  CPU 8 CSA F00000002FF47600 at time of crash, error code
  for LEDs:
  70000000
  pvthread+029300 STACK:
  [004FDB70]xm_gfl_event+000050 (0000000000000000,
  0000000000000000 [??])
  [001F22CC]get_from_list_excp+00009C ()
  [001F18AC]ldata_alloc@AF28_15+0002AC (??)
  [04912D44]hd_pin_bot:hd_get_pbuf+000024 (??, ??)
  [0493A880]hd_pin_bot:create_pbufs_da_write+000080 (??,
  ??, ??, ??, ??)
  [0493A71C]hd_pin_bot:hd_da_write+00015C (??)
  [0492AC5C]hd_pin_bot:spin_whl_for_chg_pv_vgsa+00019C (??,
  ??, ??, ??)
  [049288C0]hd_pin_bot:hd_sa_config+001540 (??, ??, ??)
  [048D9C44]hd_pin:hd_chg_pv_vgsa+000204 (??, ??, ??)
  [048D2AEC]hd_pin:hd_lvm_config+001C2C (??, ??, ??, ??)
  [048DBD14]hd_pin:hd_cfg+0001D4 (??, ??, ??, ??)
  [00003850]ovlya_addr_sc_flih_main+000130 ()
  [kdb_get_virtual_memory] no real storage @ 2FF20680
  [D0E52660]D0E52660 ()
  [kdb_read_mem] no real storage @ FFFFFFFFFFF65D0
  

Local fix

Problem summary

• While running 'chvg -g' or shortly after, AIX may
  crash in the I/O path, most often in code to allocate
  pbufs, as described above.
  

Problem conclusion

• Fix 'chvg -g' path to correctly handle all timing situations
  to not cause a crash in the future.
  

Temporary fix

Comments

• 6100-04 - use AIX APAR IZ83721
  6100-05 - use AIX APAR IZ84970
  6100-06 - use AIX APAR IZ93123
  6100-06 - use AIX APAR IZ85840
  7100-00 - use AIX APAR IZ86119
  

APAR Information

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

  IZ83721

• 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 U835904

     UP11/05/10 I 1000

PTF to Fileset Mapping

• U835904 bos.rte.lvm 6.1.6.15