May 24 09:05:56 river kernel: [154680.200071] INFO: task kswapd0:38 blocked for more than 120 seconds.
May 24 09:05:56 river kernel: [154680.200082]       Not tainted 3.13.0-53-generic #89-Ubuntu
May 24 09:05:56 river kernel: [154680.200084] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 24 09:05:56 river kernel: [154680.200088] kswapd0         D 0000000000000000     0    38      2 0x00000000
May 24 09:05:56 river kernel: [154680.200091]  ffff8800e7671bf0 0000000000000246 ffff8800e8fd4800 ffff8800e7671fd8
May 24 09:05:56 river kernel: [154680.200093]  0000000000013180 0000000000013180 ffff8800e8fd4800 ffff880002ebc400
May 24 09:05:56 river kernel: [154680.200095]  ffff880002ebc404 ffff8800e8fd4800 00000000ffffffff ffff880002ebc408
May 24 09:05:56 river kernel: [154680.200097] Call Trace:
May 24 09:05:56 river kernel: [154680.200104]  [<ffffffff81727749>] schedule_preempt_disabled+0x29/0x70
May 24 09:05:56 river kernel: [154680.200107]  [<ffffffff817295b5>] __mutex_lock_slowpath+0x135/0x1b0
May 24 09:05:56 river kernel: [154680.200108]  [<ffffffff8172964f>] mutex_lock+0x1f/0x2f
May 24 09:05:56 river kernel: [154680.200115]  [<ffffffffa006c595>] dm_bufio_shrink_count+0x25/0x60 [dm_bufio]
May 24 09:05:56 river kernel: [154680.200119]  [<ffffffff81161298>] shrink_slab+0x108/0x370
May 24 09:05:56 river kernel: [154680.200121]  [<ffffffff81164e98>] balance_pgdat+0x3e8/0x610
May 24 09:05:56 river kernel: [154680.200123]  [<ffffffff8116521b>] kswapd+0x15b/0x3f0
May 24 09:05:56 river kernel: [154680.200127]  [<ffffffff810ab220>] ? prepare_to_wait_event+0x100/0x100
May 24 09:05:56 river kernel: [154680.200129]  [<ffffffff811650c0>] ? balance_pgdat+0x610/0x610
May 24 09:05:56 river kernel: [154680.200132]  [<ffffffff8108b6b2>] kthread+0xd2/0xf0
May 24 09:05:56 river kernel: [154680.200134]  [<ffffffff8108b5e0>] ? kthread_create_on_node+0x1c0/0x1c0
May 24 09:05:56 river kernel: [154680.200136]  [<ffffffff81733868>] ret_from_fork+0x58/0x90
May 24 09:05:56 river kernel: [154680.200138]  [<ffffffff8108b5e0>] ? kthread_create_on_node+0x1c0/0x1c0