4.15.0-43-generic #46~16.04.1-Ubuntu SMP x86_64 I have the same problem but the process that gets stuck is dockerd not systemd.
3,2077,80354225063,-;INFO: task dockerd:2070 blocked for more than 120 seconds. 3,2078,80354230430,-; Tainted: P O 4.15.0-43-generic #46~16.04.1-Ubuntu 3,2079,80354236566,-;"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 6,2080,80354242978,-;dockerd D 0 2070 1 0x00000000 4,2081,80354242981,-;Call Trace: 4,2082,80354242984,-; __schedule+0x3d6/0x8b0 4,2083,80354242986,-; ? xen_smp_send_reschedule+0x10/0x20 4,2084,80354242989,-; schedule+0x36/0x80 4,2085,80354242991,-; schedule_timeout+0x1db/0x370 4,2086,80354242993,-; ? try_to_wake_up+0x59/0x4a0 4,2087,80354242995,-; wait_for_completion+0xb4/0x140 4,2088,80354242996,-; ? wake_up_q+0x70/0x70 4,2089,80354242998,-; flush_work+0x129/0x1e0 4,2090,80354242999,-; ? worker_detach_from_pool+0xb0/0xb0 4,2091,80354243001,-; flush_delayed_work+0x3f/0x50 4,2092,80354243004,-; fsnotify_wait_marks_destroyed+0x15/0x20 4,2093,80354243005,-; fsnotify_destroy_group+0x48/0xd0 4,2094,80354243008,-; inotify_release+0x1e/0x50 4,2095,80354243011,-; __fput+0xea/0x220 4,2096,80354243013,-; ____fput+0xe/0x10 4,2097,80354243014,-; task_work_run+0x8a/0xb0 4,2098,80354243016,-; exit_to_usermode_loop+0xc4/0xd0 4,2099,80354243018,-; do_syscall_64+0xf4/0x130 4,2100,80354243020,-; entry_SYSCALL_64_after_hwframe+0x3d/0xa2 The tainted marker is from zfs module since I have a ZFS partition mounted in the system. The / partition however is EXT4, and docker is running from /. cat /proc/1/stack [<0>] flush_work+0x129/0x1e0 [<0>] flush_delayed_work+0x3f/0x50 [<0>] fsnotify_wait_marks_destroyed+0x15/0x20 [<0>] fsnotify_destroy_group+0x48/0xd0 [<0>] inotify_release+0x1e/0x50 [<0>] __fput+0xea/0x220 [<0>] ____fput+0xe/0x10 [<0>] task_work_run+0x8a/0xb0 [<0>] exit_to_usermode_loop+0xc4/0xd0 [<0>] do_syscall_64+0xf4/0x130 [<0>] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [<0>] 0xffffffffffffffff 6,2111,218820611653,-; task PC stack pid father 6,2112,218820614372,-;systemd D 0 1 0 0x00000004 4,2113,218820616975,-;Call Trace: 4,2114,218820618224,-; __schedule+0x3d6/0x8b0 4,2115,218820619977,-; ? xen_smp_send_reschedule+0x10/0x20 4,2116,218820622101,-; schedule+0x36/0x80 4,2117,218820624470,-; schedule_timeout+0x1db/0x370 4,2118,218820627660,-; ? delete_node+0x1a5/0x1f0 4,2119,218820630763,-; wait_for_completion+0xb4/0x140 4,2120,218820634184,-; ? wake_up_q+0x70/0x70 4,2121,218820638148,-; flush_work+0x129/0x1e0 4,2122,218820642490,-; ? worker_detach_from_pool+0xb0/0xb0 4,2123,218820646706,-; flush_delayed_work+0x3f/0x50 4,2124,218820650474,-; fsnotify_wait_marks_destroyed+0x15/0x20 4,2125,218820654789,-; fsnotify_destroy_group+0x48/0xd0 4,2126,218820658838,-; inotify_release+0x1e/0x50 4,2127,218820662400,-; __fput+0xea/0x220 4,2128,218820665486,-; ____fput+0xe/0x10 4,2129,218820668890,-; task_work_run+0x8a/0xb0 4,2130,218820672633,-; exit_to_usermode_loop+0xc4/0xd0 4,2131,218820676852,-; do_syscall_64+0xf4/0x130 4,2132,218820680778,-; entry_SYSCALL_64_after_hwframe+0x3d/0xa2 4,2133,218820686587,-;RIP: 0033:0x7efd22aaf57d 4,2134,218820691555,-;RSP: 002b:00007ffd463e6070 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 4,2135,218820699907,-;RAX: 0000000000000000 RBX: 000000000000000d RCX: 00007efd22aaf57d 4,2136,218820708355,-;RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000d 4,2137,218820717053,-;RBP: 00007efd241ea708 R08: 00005559085084d0 R09: 0000000000000001 4,2138,218820726163,-;R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 4,2139,218820734459,-;R13: 000055590749d580 R14: 00005559084bd9b8 R15: 000055590749e9c0 Also kworker shows a stack at some point. 3,1861,80233315906,-;INFO: task kworker/u30:3:5705 blocked for more than 120 seconds. 3,1862,80233321444,-; Tainted: P O 4.15.0-43-generic #46~16.04.1-Ubuntu 3,1863,80233327648,-;"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 6,1864,80233333902,-;kworker/u30:3 D 0 5705 2 0x80000000 6,1865,80233333909,-;Workqueue: events_unbound fsnotify_mark_destroy_workfn 4,1866,80233333910,-;Call Trace: 4,1867,80233333914,-; __schedule+0x3d6/0x8b0 4,1868,80233333918,-; schedule+0x36/0x80 4,1869,80233333920,-; schedule_timeout+0x1db/0x370 4,1870,80233333927,-; ? __enqueue_entity+0x5c/0x60 4,1871,80233333932,-; ? enqueue_entity+0x112/0x670 4,1872,80233333937,-; wait_for_completion+0xb4/0x140 4,1873,80233333939,-; ? wake_up_q+0x70/0x70 4,1874,80233333944,-; __synchronize_srcu.part.13+0x85/0xb0 4,1875,80233333947,-; ? trace_raw_output_rcu_utilization+0x50/0x50 4,1876,80233333950,-; synchronize_srcu+0xd3/0xe0 4,1877,80233333956,-; ? synchronize_srcu+0xd3/0xe0 4,1878,80233333962,-; fsnotify_mark_destroy_workfn+0x7c/0xe0 4,1879,80233333966,-; process_one_work+0x14d/0x410 4,1880,80233333968,-; worker_thread+0x22b/0x460 4,1881,80233333971,-; kthread+0x105/0x140 4,1882,80233333974,-; ? process_one_work+0x410/0x410 4,1883,80233333976,-; ? kthread_destroy_worker+0x50/0x50 4,1884,80233333979,-; ret_from_fork+0x35/0x40 A note on this is that the issues reappears after a reboot either in a day or in a few days. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1798212 Title: systemd stuck in uninterruptible sleep state Status in systemd package in Ubuntu: Confirmed Bug description: Ubuntu 16.04 systemd 229 may get stuck in an uninterruptible sleep state. Any subsequent systemctl command times out with "Failed to execute operation: Connection timed out" error message. gdb and strace is unable to attach to systemd process 1. $ systemd --version systemd 229 +PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ -LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN $ cat /proc/1/stack [<0>] flush_work+0x129/0x1e0 [<0>] flush_delayed_work+0x3f/0x50 [<0>] fsnotify_wait_marks_destroyed+0x15/0x20 [<0>] fsnotify_destroy_group+0x48/0xd0 [<0>] inotify_release+0x1e/0x50 [<0>] __fput+0xea/0x220 [<0>] ____fput+0xe/0x10 [<0>] task_work_run+0x8a/0xb0 [<0>] exit_to_usermode_loop+0xc4/0xd0 [<0>] do_syscall_64+0xf4/0x130 [<0>] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [<0>] 0xffffffffffffffff $ cat /proc/1/status Name: systemd Umask: 0000 State: D (disk sleep) Tgid: 1 Ngid: 0 Pid: 1 PPid: 0 TracerPid: 9724 Uid: 0 0 0 0 Gid: 0 0 0 0 FDSize: 128 Groups: NStgid: 1 NSpid: 1 NSpgid: 1 NSsid: 1 VmPeak: 251136 kB VmSize: 185728 kB VmLck: 0 kB VmPin: 0 kB VmHWM: 6620 kB VmRSS: 6264 kB RssAnon: 2380 kB RssFile: 3884 kB RssShmem: 0 kB VmData: 18752 kB VmStk: 132 kB VmExe: 1392 kB VmLib: 3692 kB VmPTE: 128 kB VmSwap: 0 kB HugetlbPages: 0 kB CoreDumping: 0 Threads: 1 SigQ: 1/257098 SigPnd: 0000000000040000 ShdPnd: 0000000000010000 SigBlk: 7be3c0fe28014a03 SigIgn: 0000000000001000 SigCgt: 00000001800004ec CapInh: 0000000000000000 CapPrm: 0000003fffffffff CapEff: 0000003fffffffff CapBnd: 0000003fffffffff CapAmb: 0000000000000000 NoNewPrivs: 0 Seccomp: 0 Speculation_Store_Bypass: vulnerable Cpus_allowed: ffffffff Cpus_allowed_list: 0-31 Mems_allowed: 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000003 Mems_allowed_list: 0-1 voluntary_ctxt_switches: 716968 nonvoluntary_ctxt_switches: 9565 $ dmesg [...] [1255076.993707] INFO: task systemd:1 blocked for more than 120 seconds. [1255077.000295] Not tainted 4.15.0-32-generic #35~16.04.1-Ubuntu [1255077.006804] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1255077.014996] systemd D 0 1 0 0x00000000 [1255077.015000] Call Trace: [1255077.015011] __schedule+0x3d6/0x8b0 [1255077.015019] ? enqueue_entity+0x112/0x670 [1255077.015021] schedule+0x36/0x80 [1255077.015025] schedule_timeout+0x1db/0x370 [1255077.015028] ? check_preempt_curr+0x54/0x90 [1255077.015030] ? ttwu_do_wakeup+0x1e/0x150 [1255077.015033] wait_for_completion+0xb4/0x140 [1255077.015035] ? wake_up_q+0x70/0x70 [1255077.015040] flush_work+0x129/0x1e0 [1255077.015043] ? worker_detach_from_pool+0xb0/0xb0 [1255077.015045] flush_delayed_work+0x3f/0x50 [1255077.015052] fsnotify_wait_marks_destroyed+0x15/0x20 [1255077.015055] fsnotify_destroy_group+0x48/0xd0 [1255077.015058] inotify_release+0x1e/0x50 [1255077.015063] __fput+0xea/0x220 [1255077.015065] ____fput+0xe/0x10 [1255077.015068] task_work_run+0x8a/0xb0 [1255077.015074] exit_to_usermode_loop+0xc4/0xd0 [1255077.015077] do_syscall_64+0xf4/0x130 [1255077.015080] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [1255077.015084] RIP: 0033:0x7f29c9c3457d [1255077.015085] RSP: 002b:00007ffec956fe30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [1255077.015088] RAX: 0000000000000000 RBX: 0000000000000010 RCX: 00007f29c9c3457d [1255077.015090] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000010 [1255077.015092] RBP: 00007f29cb36d700 R08: 00005625f0043420 R09: 0000000000000001 [1255077.015093] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000000b [1255077.015095] R13: 00005625eeed6040 R14: 00005625eff179b8 R15: 00005625eeed7460 [1255077.015421] INFO: task kworker/u66:2:108669 blocked for more than 120 seconds. [1255077.022960] Not tainted 4.15.0-32-generic #35~16.04.1-Ubuntu [1255077.029469] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1255077.037601] kworker/u66:2 D 0 108669 2 0x80000080 [1255077.037613] Workqueue: events_unbound fsnotify_mark_destroy_workfn [1255077.037615] Call Trace: [1255077.037621] __schedule+0x3d6/0x8b0 [1255077.037627] ? __update_load_avg_blocked_se.isra.37+0xc5/0x140 [1255077.037629] schedule+0x36/0x80 [1255077.037633] schedule_timeout+0x1db/0x370 [1255077.037636] ? add_timer+0x125/0x280 [1255077.037639] wait_for_completion+0xb4/0x140 [1255077.037641] ? wake_up_q+0x70/0x70 [1255077.037646] __synchronize_srcu.part.13+0x85/0xb0 [1255077.037650] ? trace_raw_output_rcu_utilization+0x50/0x50 [1255077.037653] synchronize_srcu+0xd3/0xe0 [1255077.037656] ? synchronize_srcu+0xd3/0xe0 [1255077.037660] fsnotify_mark_destroy_workfn+0x7c/0xe0 [1255077.037664] process_one_work+0x14d/0x410 [1255077.037678] worker_thread+0x22b/0x460 [1255077.037682] kthread+0x105/0x140 [1255077.037691] ? process_one_work+0x410/0x410 [1255077.037701] ? kthread_destroy_worker+0x50/0x50 [1255077.037712] ret_from_fork+0x35/0x40 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1798212/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
