IJ54771: PROBABLE SYSTEM CRASH AT IODONE(). APPLIES TO AIX 7300-02

APAR status

• Closed as program error.

Error description

• Probable system crash with below stack during storage side link
  down scenarios when fscsiX device ODM attribute fast_link_recov
  is set to 'yes'.
  
  KDB(1)> f
  pvthread+0AAE00 STACK:
  Ý002E3C28¨iodone+0000E8 (0003D541ACC81F06 Ý??¨)
  ÝF10009D5A13F66DC¨cvfsc_process_scsi_elem+0009DC (??, ??)
  ÝF10009D5A13FCDBC¨cvfsc_recv+00021C (??, ??)
  ÝF10009D5A12DA970¨cvfc_proc_proto_response+000410 (??, ??)
  ÝF10009D5A1308B54¨cvfc_proto_chn_kthread+000CB4 (??)
  Ý004888D4¨threadentry+000054 (??, ??, ??, ??)
  

Local fix

Problem summary

• Probable system crash with below stack during storage side link
  down scenarios when fscsiX device ODM attribute fast_link_recov
  is set to 'yes'.
  
  KDB(1)> f
  pvthread+0AAE00 STACK:
   002E3C28 iodone+0000E8 (0003D541ACC81F06  ?? )
   F10009D5A13F66DC cvfsc_process_scsi_elem+0009DC (??, ??)
   F10009D5A13FCDBC cvfsc_recv+00021C (??, ??)
   F10009D5A12DA970 cvfc_proc_proto_response+000410 (??, ??)
   F10009D5A1308B54 cvfc_proto_chn_kthread+000CB4 (??)
   004888D4 threadentry+000054 (??, ??, ??, ??)
  

Problem conclusion

• Fixed the driver stack to avoid the crash.
  

Temporary fix

Comments

APAR Information

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

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

Fix information

• Fixed component name

  AIX V7.3

• Fixed component ID

  5765CD300

Applicable component levels