IV88581: VIOS CRASH WHEN CREATING SEA IN LOW MEMORY CONDITION APPLIES TO AIX 7100-03

APAR status

• Closed as program error.

Error description

• Error description :
  The VIOS may crash when running mkvdev with the following
  stack :
  CRASH INFORMATION:
  CPU 0 CSA F1000815B0036D00 at time of crash,
                              error code for LEDs: 70000000
  pvthread+000200 STACK:
  WARNING: bad IAR: 00000000, display stack from LR:
  046A58B8
  [046A58B8]vioentdd:vioent_map_memory+000418
  (0000000000000000,
   0000000000004080, 0000000000000001, F1000815B0036840,
   F1000E00057DC880, 0000000000000001, 0000000000000001
  [??])
  [046B3040]vioentdd:vioent_manage_pool+0005A0 (??, ??, ??)
  [046BDED8]vioentdd:vioent_pool_manager+0003D8 (??)
  [0026428C]i_offlevel+00014C (??, ??)
  [00263C7C]i_softmod+0005FC ()
  [0020284C]flih_util+000258 ()
  
  With no more pinnable frame available reported in vmstat.
  

Local fix

• Add more memory to VIOS.
  

Problem summary

• The VIOS may crash when running mkvdev to create SEA with the
  following stack :
  CRASH INFORMATION:
  CPU 0 CSA F1000815B0036D00 at time of crash,
                              error code for LEDs: 70000000
  pvthread+000200 STACK:
  WARNING: bad IAR: 00000000, display stack from LR:
  046A58B8
   046A58B8 vioentdd:vioent_map_memory+000418
  (0000000000000000,
   0000000000004080, 0000000000000001, F1000815B0036840,
   F1000E00057DC880, 0000000000000001, 0000000000000001
   ?? )
   046B3040 vioentdd:vioent_manage_pool+0005A0 (??, ??, ??)
   046BDED8 vioentdd:vioent_pool_manager+0003D8 (??)
   0026428C i_offlevel+00014C (??, ??)
   00263C7C i_softmod+0005FC ()
   0020284C flih_util+000258 ()
  

Problem conclusion

• Rearrange code so that DMA handle is initialized before the
  control mpool is created.
  

Temporary fix

Comments

APAR Information

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

  IV82795

• 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 U872415

     UP17/01/19 I 1000