Issue

• Repeating log entries similar to the following:

  Jun 7 19:45:21 hostname kernel: INFO: task nfsd:3369 blocked for more than 120 seconds.
  Jun 7 19:45:21 hostname kernel: "echo 0 >/proc/sys/kernel/hung_task_timeout_secs" disables this message.
  Jun 7 19:45:21 hostname kernel: nfsd D ffff8101062a9100 03369 1 3370 3368 (L-TLB)
  Jun 7 19:45:21 hostname kernel: ffff8101053519e0 0000000000000046 0000000000000020 ffff810105ea0780
  Jun 7 19:45:21 hostname kernel: ffff8101180e203a 000000000000000a ffff81013ecb77a0 ffff8101062a9100
  Jun 7 19:45:21 hostname kernel: 00000cab54499f77 00000000000026c3 ffff81013ecb7988 00000001000002d8
  Jun 7 19:45:21 hostname kernel: Call Trace:
  Jun 7 19:45:21 hostname kernel: [] _spin_lock_bh+0x9/0x14
  Jun 7 19:45:21 hostname kernel: [] inode_wait+0x0/0xd
  Jun 7 19:45:21 hostname kernel: [] inode_wait+0x9/0xd
  Jun 7 19:45:21 hostname kernel: [] __wait_on_bit+0x40/0x6e
  Jun 7 19:45:21 hostname kernel: [] inode_wait+0x0/0xd
  Jun 7 19:45:21 hostname kernel: [] out_of_line_wait_on_bit+0x6c/0x78
  Jun 7 19:45:21 hostname kernel: [] wake_bit_function+0x0/0x23
  

• Users getting timeouts on NFS access from clients

• Eventually system is not usable and must be rebooted