Kernel panic - not syncing: hung_task: blocked tasks

Issue

• System crashed with following Call Traces.

INFO: task kjournald:437 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kjournald     D 000009B5  2992   437     19           462   416 (L-TLB)
       cf7fded4 00000046 a53cb5f8 000009b5 c04e19df 00000046 cf699b60 0000000a 
       f7fbbaa0 a53cc8ef 000009b5 000012f7 00000000 f7fbbbac cf392600 f4894040 
       0146c25c cf392fa0 cf49fe2c cf49fe3c 0146c25c c042d81f cf49fe1c ffffffff 
Call Trace:
 [<c04e19df>] elv_next_request+0x2c/0x134
 [<c042d81f>] getnstimeofday+0x30/0xb6
 [<c0623530>] io_schedule+0x36/0x59
 [<c047952b>] sync_buffer+0x30/0x33
 [<c0623707>] __wait_on_bit+0x33/0x58
 [<c04794fb>] sync_buffer+0x0/0x33
 [<c04794fb>] sync_buffer+0x0/0x33
 [<c062378e>] out_of_line_wait_on_bit+0x62/0x6a
 [<c04373d4>] wake_bit_function+0x0/0x3c
 [<c04794a8>] __wait_on_buffer+0x1c/0x1f
 [<f88534ba>] journal_commit_transaction+0x4d6/0xf60 [jbd]
 [<c042e679>] lock_timer_base+0x15/0x2f
 [<c042e6f8>] try_to_del_timer_sync+0x65/0x6c
 [<f8856d2c>] kjournald+0xa1/0x1c2 [jbd]
 [<c04373a7>] autoremove_wake_function+0x0/0x2d
 [<f8856c8b>] kjournald+0x0/0x1c2 [jbd]
 [<c04372e2>] kthread+0xc0/0xee
 [<c0437222>] kthread+0x0/0xee
 [<c0405c87>] kernel_thread_helper+0x7/0x10
 =======================
Kernel panic - not syncing: hung_task: blocked tasks