gfs2: not a GFS2 filesystem INFO: task kworker/1:3:4667 blocked for more than 140 seconds. Not tainted 4.18.0-rc6-next-20180725+ #18 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:3 D20560 4667 2 0x80000000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:2820 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3468 schedule+0xfb/0x450 kernel/sched/core.c:3512 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3570 __mutex_lock_common kernel/locking/mutex.c:1003 [inline] __mutex_lock+0xbf5/0x1680 kernel/locking/mutex.c:1073 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 linkwatch_event+0x5f/0xe0 net/core/link_watch.c:236 process_one_work+0xc73/0x1ba0 kernel/workqueue.c:2153 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 INFO: task kworker/1:0:3613 blocked for more than 140 seconds. Not tainted 4.18.0-rc6-next-20180725+ #18 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:0 D22432 3613 2 0x80000000 Workqueue: ipv6_addrconf addrconf_verify_work Call Trace: context_switch kernel/sched/core.c:2820 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3468 schedule+0xfb/0x450 kernel/sched/core.c:3512 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3570 __mutex_lock_common kernel/locking/mutex.c:1003 [inline] __mutex_lock+0xbf5/0x1680 kernel/locking/mutex.c:1073 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 addrconf_verify_work+0xe/0x20 net/ipv6/addrconf.c:4459 process_one_work+0xc73/0x1ba0 kernel/workqueue.c:2153 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 775 Comm: khungtaskd Not tainted 4.18.0-rc6-next-20180725+ #18 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb39/0x10b0 kernel/hung_task.c:265 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2291 Comm: udevd Not tainted 4.18.0-rc6-next-20180725+ #18 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_disable arch/x86/include/asm/paravirt.h:788 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:801 [inline] RIP: 0010:seqcount_lockdep_reader_access include/linux/seqlock.h:80 [inline] RIP: 0010:read_seqcount_begin include/linux/seqlock.h:164 [inline] RIP: 0010:ktime_get_ts64+0x105/0x530 kernel/time/timekeeping.c:886 Code: 00 49 83 3e 00 0f 84 6a 03 00 00 e8 b5 f1 10 00 9c 58 0f 1f 44 00 00 48 89 c3 48 8b 85 20 ff ff ff 80 38 00 0f 85 c9 03 00 00 <48> 83 3d 83 fb 85 06 00 0f 84 44 03 00 00 e8 88 f1 10 00 fa 66 0f RSP: 0018:ffff8801ca4b7880 EFLAGS: 00000246 RAX: fffffbfff0fe363e RBX: 0000000000000293 RCX: ffffffff816bb5fa RDX: 0000000000000000 RSI: ffffffff816bb64b RDI: 0000000000000005 RBP: ffff8801ca4b7988 R08: ffff8801ca4ae300 R09: ffffed0039660708 R10: ffffed0039660708 R11: ffff8801cb303843 R12: dffffc0000000000 R13: ffff8801ca4b7ae8 R14: ffffffff87f1b1e0 R15: ffff8801ca4b7ae8 FS: 00007f76280667a0(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001ca41a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ep_set_mstimeout fs/eventpoll.c:1707 [inline] ep_poll+0x556/0x1230 fs/eventpoll.c:1738 do_epoll_wait+0x1b0/0x200 fs/eventpoll.c:2180 __do_sys_epoll_wait fs/eventpoll.c:2190 [inline] __se_sys_epoll_wait fs/eventpoll.c:2187 [inline] __x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2187 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f762777a943 Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24 RSP: 002b:00007ffdd2d7f2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007f762777a943 RDX: 0000000000000008 RSI: 00007ffdd2d7f3f0 RDI: 000000000000000a RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000d164f0 R15: 0000000000d16250