Oracle RAC node gets crashed with errors 'Kernel panic - not syncing: hung_task: blocked task' due to CPU blocking realtime task

Issue

• Oracle RAC node gets crashed with errors 'Kernel panic - not syncing: hung_task: blocked task'

  INFO: task jbd2/dm-48-8:11406 blocked for more than 360 seconds.
        Tainted: P           -- ------------    2.6.32-573.22.1.el6.x86_64 #1
  "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  jbd2/dm-48-8  D 000000000000002e     0 11406      2 0x00000000
   ffff88801d1b3c20 0000000000000046 ffff88801d1b3b80 ffffffff8126ff24
   ffff88401d9b2b80 ffff88401da28f00 ffff88801d1b3bf0 ffffffffa0004d9f
   ffff88801d1b3bf0 0000000000000000 ffff88801ef525f8 ffff88801d1b3fd8
  Call Trace:
   [<ffffffff8126ff24>] ? blk_unplug+0x34/0x70
   [<ffffffffa0004d9f>] ? dm_table_unplug_all+0x5f/0x100 [dm_mod]
   [<ffffffff811c95c0>] ? sync_buffer+0x0/0x50
   [<ffffffff811c95c0>] ? sync_buffer+0x0/0x50
   [<ffffffff81539b33>] io_schedule+0x73/0xc0
   [<ffffffff811c9600>] sync_buffer+0x40/0x50
   [<ffffffff8153a61f>] __wait_on_bit+0x5f/0x90
   [<ffffffff811c95c0>] ? sync_buffer+0x0/0x50
   [<ffffffff8153a6c8>] out_of_line_wait_on_bit+0x78/0x90
   [<ffffffff810a18a0>] ? wake_bit_function+0x0/0x50
   [<ffffffff810a16a7>] ? bit_waitqueue+0x17/0xd0
   [<ffffffff811c95b6>] __wait_on_buffer+0x26/0x30
   [<ffffffffa03d9116>] jbd2_journal_commit_transaction+0xaa6/0x14f0 [jbd2]
   [<ffffffff8108aa8b>] ? try_to_del_timer_sync+0x7b/0xe0
   [<ffffffffa03dea38>] kjournald2+0xb8/0x220 [jbd2]
   [<ffffffff810a1820>] ? autoremove_wake_function+0x0/0x40
   [<ffffffffa03de980>] ? kjournald2+0x0/0x220 [jbd2]
   [<ffffffff810a138e>] kthread+0x9e/0xc0
   [<ffffffff8100c28a>] child_rip+0xa/0x20
   [<ffffffff810a12f0>] ? kthread+0x0/0xc0
   [<ffffffff8100c280>] ? child_rip+0x0/0x20
  Kernel panic - not syncing: hung_task: blocked tasks
  Pid: 851, comm: khungtaskd Tainted: P           -- ------------    2.6.32-573.22.1.el6.x86_64 #1
  Call Trace:
   [<ffffffff81538c41>] ? panic+0xa7/0x16f
   [<ffffffff810ed114>] ? watchdog+0x254/0x290
  [...]