5944.038204] EXT4-fs (sdf3): mounted filesystem with ordered data mode. Opts: (null)
[ 6116.149602] INFO: task sync:18343 blocked for more than 120 seconds.
[ 6116.149608] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 6116.149612] sync            D 0000000000000001     0 18343  16581 0x00000000
[ 6116.149619]  ffff8801bb7a3cb8 0000000000000082 0000000000000000 000000000000000e
[ 6116.149626]  ffff8801bb7a3fd8 ffff8801bb7a3fd8 ffff8801bb7a3fd8 0000000000013780
[ 6116.149633]  ffff88017b7edbc0 ffff8801d4e42de0 ffff8801bb7a3ce8 7fffffffffffffff
[ 6116.149639] Call Trace:
[ 6116.149650]  [<ffffffff81657d8f>] schedule+0x3f/0x60
[ 6116.149656]  [<ffffffff816583d5>] schedule_timeout+0x2a5/0x320
[ 6116.149663]  [<ffffffff8101ae69>] ? sched_clock+0x9/0x10
[ 6116.149669]  [<ffffffff81030888>] ? native_smp_send_reschedule+0x48/0x60
[ 6116.149675]  [<ffffffff81052002>] ? ttwu_queue+0x92/0xd0
[ 6116.149680]  [<ffffffff81657bcf>] wait_for_common+0xdf/0x180
[ 6116.149688]  [<ffffffff811a69d0>] ? __sync_filesystem+0x90/0x90
[ 6116.149694]  [<ffffffff8105fae0>] ? try_to_wake_up+0x200/0x200
[ 6116.149699]  [<ffffffff811a69d0>] ? __sync_filesystem+0x90/0x90
[ 6116.149705]  [<ffffffff81657d4d>] wait_for_completion+0x1d/0x20
[ 6116.149710]  [<ffffffff8119f6dd>] writeback_inodes_sb_nr+0x7d/0xa0
[ 6116.149716]  [<ffffffff8119f94e>] writeback_inodes_sb+0x2e/0x40
[ 6116.149721]  [<ffffffff811a698e>] __sync_filesystem+0x4e/0x90
[ 6116.149727]  [<ffffffff811a69ef>] sync_one_sb+0x1f/0x30
[ 6116.149733]  [<ffffffff8117b435>] iterate_supers+0xa5/0x100
[ 6116.149738]  [<ffffffff811a6aa0>] sys_sync+0x30/0x70
[ 6116.149744]  [<ffffffff81662282>] system_call_fastpath+0x16/0x1b