PK66411: Through MVFS ? NFS, multithreaded file locking applications on multiprocessor RedHat Linux systems can cause a kernel panic

APAR status

• Closed as Vendor Solution.

Error description

• Through MVFS and remote VOBs and Views accessed by NFS, multithr
  eaded file locking applications which file lock against a single
   file on a multiprocessor RedHat Enterprise 4 Linux platform, ca
  n cause a kernel panic
  
  The panic backtrace is as follows:
  
  Call Trace:?ffffffff80190776?{locks_remove_posix+156} ?ffffffff8
  017be0d?{__fput+73}
         ?ffffffff8017aa0d?{filp_close+103} ?ffffffffa02824a5?{:mv
  fs:mvop_linux_close_kernel+41}
         ?ffffffffa02825b9?{:mvfs:mvop_linux_close+272} ?ffffffffa
  024f9db?{:mvfs:mvfs_closev_ctx+436}
         ?ffffffffa027ee44?{:mvfs:vnode_fop_release+121} ?ffffffff
  8017be27?{__fput+99}
         ?ffffffff8017aa0d?{filp_close+103} ?ffffffff80139f3d?{put
  _files_struct+101}
         ?ffffffff8013a76f?{do_exit+711} ?ffffffff801418ea?{recalc
  _sigpending+15}
         ?ffffffff80141e9b?{__dequeue_signal+458} ?ffffffff8013b25
  2?{sys_exit_group+0}
         ?ffffffff80143d39?{get_signal_to_deliver+1084} ?ffffffff8
  010f6fb?{do_signal+131}
         ?ffffffff8017a75b?{filp_open+105} ?ffffffff801f04e5?{strn
  cpy_from_user+74}
         ?ffffffff801102f3?{sysret_signal+28} ?ffffffff801105df?{p
  tregscall_common+103}
  
  
  Workaround:  None, unless the VOB and View storage is local to t
  he system
  

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

• The problem is caused by a RedHat Linux kernel defect.
  

APAR Information

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

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

Fix information

Applicable component levels