IZ82022: M/C CRASHED DUE TO NFS KRB WORKLOAD APPLIES TO AIX 6100-06

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• nfs v4 client crashed after encountered a deferred mount
  and server reboot. the stack trace looks like:
  KDB(0)> f
  pvthread+247600 STACK:
  ￭0001BEE0abend_trap+000000 ()
  ￭04C6D798nfs4updateid+0002B8 (??)
  ￭0027189Cthreadentry+00005C (??, ??, ??, ??)
  
  where it hits the follow AVOW()
  AVOW(((fp->f_flags2 & F_RECLAIMING) == 0),
  EINVAL_NFS4_RECLAIM_FLAG, fp);
  
  within the walk of s_recover_list
  In the console log (stat output) you may find there is an
  entry talk about deferred mount on the fsid.
  The s_recover_list and s_recover_wait list are tangled up.
  

Local fix

Problem summary

• nfs v4 client crashed after encountered a deferred mount
  and server reboot. the stack trace looks like:
  KDB(0)> f
  pvthread+247600 STACK:
   0001BEE0 abend_trap+000000 ()
   04C6D798 nfs4updateid+0002B8 (??)
   0027189C threadentry+00005C (??, ??, ??, ??)
  
  where it hits the follow AVOW()
  AVOW(((fp->f_flags2 & F_RECLAIMING) == 0),
  EINVAL_NFS4_RECLAIM_FLAG, fp);
  
  within the walk of s_recover_list
  In the console log (stat output) you may find there is an
  entry talk about deferred mount on the fsid.
  The s_recover_list and s_recover_wait list are tangled up.
  

Problem conclusion

• if we already have a server object then don't put ourself
  onto the s_recover_wait just within nfs4_get_serv_obj()
  

Temporary fix

Comments

• 6100-04 - use AIX APAR IZ83984
  6100-05 - use AIX APAR IZ83948
  6100-06 - use AIX APAR IZ81386
  6100-06 - use AIX APAR IZ82022
  7100-00 - use AIX APAR IZ84533
  

APAR Information

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

  IZ81386

• 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 U835918

     UP11/05/10 I 1000

PTF to Fileset Mapping

• U835918 bos.net.nfs.client 6.1.6.15