IPv6: ADDRCONF(NETDEV_CHANGE): nr5: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): nr4: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): nr6: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): nr7: link becomes ready INFO: rcu_preempt self-detected stall on CPU 1-...: (1 GPs behind) idle=6bd/140000000000001/0 softirq=29381/29395 fqs=10000 INFO: rcu_preempt detected stalls on CPUs/tasks: 1-...: (1 GPs behind) idle=6bd/140000000000001/0 softirq=29381/29395 fqs=10000 (detected by 0, t=10002 jiffies, g=1083, c=1082, q=7060) Task dump for CPU 1: kworker/u4:4 R running task 0 2187 2 0x00000008 Workqueue: netns cleanup_net ffffffff8246a8c0 ffff8800b3c407b8 ffff88012b076f80 ffff88012b3791c0 ffff8800ba4dc000 ffff8800ba4dbd58 ffff8800ba4dbd50 ffff88012b3791c0 ffff8800ba4dbd70 ffff8800ba4dbc10 ffffffff8246af04 7fffffffffffffff Call Trace: (t=10020 jiffies g=1083 c=1082 q=7060) Task dump for CPU 1: kworker/u4:4 R running task 0 2187 2 0x00000008 Workqueue: netns cleanup_net 0000000000000002 ffff88012c103dc0 ffffffff811831e6 0000000000000001 ffffffff8305f240 ffff88012c103dd8 ffffffff81185672 0000000000000002 ffff88012c103e08 ffffffff811b1e59 ffff88012c117200 ffffffff8305f240 Call Trace: [] sched_show_task+0xb6/0x120 kernel/sched/core.c:5036 [] dump_cpu_task+0x32/0x40 kernel/sched/core.c:8717 [] rcu_dump_cpu_stacks+0x89/0xe0 kernel/rcu/tree.c:1247 [] print_cpu_stall kernel/rcu/tree.c:1354 [inline] [] check_cpu_stall kernel/rcu/tree.c:1418 [inline] [] __rcu_pending kernel/rcu/tree.c:3906 [inline] [] rcu_pending kernel/rcu/tree.c:3970 [inline] [] rcu_check_callbacks+0x502/0x8c0 kernel/rcu/tree.c:2795 [] update_process_times+0x34/0x60 kernel/time/timer.c:1420 [] tick_sched_handle.isra.16+0x31/0x40 kernel/time/tick-sched.c:152 [] tick_sched_timer+0x38/0x70 kernel/time/tick-sched.c:1088 [] __run_hrtimer kernel/time/hrtimer.c:1248 [inline] [] __hrtimer_run_queues+0x93/0x270 kernel/time/hrtimer.c:1312 [] hrtimer_interrupt+0xa7/0x1a0 kernel/time/hrtimer.c:1346 [] local_apic_timer_interrupt+0x31/0x50 arch/x86/kernel/apic/apic.c:907 [] smp_apic_timer_interrupt+0x38/0x50 arch/x86/kernel/apic/apic.c:931 [] apic_timer_interrupt+0x82/0x90 arch/x86/entry/entry_64.S:687 [] ? __read_once_size include/linux/compiler.h:218 [inline] [] ? atomic_read arch/x86/include/asm/atomic.h:26 [inline] [] ? virt_spin_lock arch/x86/include/asm/qspinlock.h:56 [inline] [] ? native_queued_spin_lock_slowpath+0x9/0x1b0 kernel/locking/qspinlock.c:304 [] spin_lock include/linux/spinlock.h:302 [inline] [] nf_conntrack_lock+0xd/0x50 net/netfilter/nf_conntrack_core.c:74 [] ctnl_untimeout.isra.4+0xc3/0xf0 net/netfilter/nfnetlink_cttimeout.c:315 [] cttimeout_net_exit+0x28/0x80 net/netfilter/nfnetlink_cttimeout.c:581 [] ops_exit_list.isra.4+0x33/0x60 net/core/net_namespace.c:134 [] cleanup_net+0x19b/0x260 net/core/net_namespace.c:431 [] process_one_work+0x150/0x440 kernel/workqueue.c:2095 [] worker_thread+0x49/0x470 kernel/workqueue.c:2229 [] kthread+0xc4/0xe0 drivers/block/aoe/aoecmd.c:1312 [] ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468