Dec  2 18:14:00 u103962 kernel: [24530.237721] INFO: task hello:7149 blocked for more than 120 seconds.
Dec  2 18:14:00 u103962 kernel: [24530.237726] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Dec  2 18:14:00 u103962 kernel: [24530.237728] hello           D ffff88031816f660     0  7149   5071 0x00000000
Dec  2 18:14:00 u103962 kernel: [24530.237733]  ffff8802d466bc18 0000000000000086 ffff8802e43a7300 ffff88032dc53ec0
Dec  2 18:14:00 u103962 kernel: [24530.237738]  ffff8802d466bfd8 ffff8802d466bfd8 ffff8802d466bfd8 0000000000013ec0
Dec  2 18:14:00 u103962 kernel: [24530.237742]  ffff88031c552e80 ffff8802d47e45c0 ffff8802d466bc38 ffff8802e5bd8278
Dec  2 18:14:00 u103962 kernel: [24530.237747] Call Trace:
Dec  2 18:14:00 u103962 kernel: [24530.237755]  [<ffffffff816f33b9>] schedule+0x29/0x70
Dec  2 18:14:00 u103962 kernel: [24530.237759]  [<ffffffff816f366e>] schedule_preempt_disabled+0xe/0x10
Dec  2 18:14:00 u103962 kernel: [24530.237763]  [<ffffffff816f22e7>] __mutex_lock_slowpath+0xd7/0x150
Dec  2 18:14:00 u103962 kernel: [24530.237768]  [<ffffffff816f1efa>] mutex_lock+0x2a/0x50
Dec  2 18:14:00 u103962 kernel: [24530.237773]  [<ffffffff811a80a1>] do_last+0x2f1/0x820
Dec  2 18:14:00 u103962 kernel: [24530.237778]  [<ffffffff811aa523>] path_openat+0xb3/0x4d0
Dec  2 18:14:00 u103962 kernel: [24530.237783]  [<ffffffff811ab342>] do_filp_open+0x42/0xa0
Dec  2 18:14:00 u103962 kernel: [24530.237787]  [<ffffffff811b8fc5>] ? __alloc_fd+0xe5/0x170
Dec  2 18:14:00 u103962 kernel: [24530.237792]  [<ffffffff8119af6a>] do_sys_open+0xfa/0x250
Dec  2 18:14:00 u103962 kernel: [24530.237796]  [<ffffffff8119b0e1>] sys_open+0x21/0x30
Dec  2 18:14:00 u103962 kernel: [24530.237800]  [<ffffffff816fd15d>] system_call_fastpath+0x1a/0x1f