======================================
| [   35.945271][   T11]  #1: ffa00000000b7d10 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:3251 (discriminator 1))
| [   35.945541][   T11]  #2: ffffffffc05308e8 (ovs_mutex){+.+.}-{4:4}, at: ovs_dp_masks_rebalance (net/openvswitch/datapath.c:2666) openvswitch
| [   35.945761][   T11]
| [   35.945761][   T11] stack backtrace:
[   35.945891][   T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   35.945892][   T11] Workqueue: events ovs_dp_masks_rebalance [openvswitch]
[   35.945898][   T11] Call Trace:
[   35.945899][   T11]  <TASK>
[   35.945901][   T11]  dump_stack_lvl (lib/dump_stack.c:122)
[   35.945907][   T11]  lockdep_rcu_suspicious.cold (kernel/locking/lockdep.c:6877)
[   35.945913][   T11] ovs_dp_masks_rebalance (net/openvswitch/datapath.c:2666 (discriminator 10)) openvswitch
[   35.945918][   T11]  process_one_work (kernel/workqueue.c:3280)
[   35.945924][   T11]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:3177)
[   35.945926][   T11]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 kernel/locking/lockdep.c:5870)
[   35.945934][   T11]  worker_thread (kernel/workqueue.c:3352 (discriminator 2) kernel/workqueue.c:3439 (discriminator 2))
[   35.945938][   T11]  ? rescuer_thread (kernel/workqueue.c:3385)
[   35.945940][   T11]  ? __kthread_parkme (./arch/x86/include/asm/bitops.h:202 (discriminator 1) ./arch/x86/include/asm/bitops.h:232 (discriminator 1) ./include/asm-generic/bitops/instrumented-non-atomic.h:142 (discriminator 1) kernel/kthread.c:272 (discriminator 1))
[   35.945944][   T11]  ? rescuer_thread (kernel/workqueue.c:3385)
[   35.945946][   T11]  kthread (kernel/kthread.c:436)
[   35.945948][   T11]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 33))
[   35.945952][   T11]  ? kthread_affine_node (kernel/kthread.c:381)
[   35.945954][   T11]  ret_from_fork (arch/x86/kernel/process.c:164)
[   35.945959][   T11]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   35.945962][   T11]  ? __switch_to (./arch/x86/include/asm/cpufeature.h:101 arch/x86/kernel/process_64.c:377 arch/x86/kernel/process_64.c:665)
[   35.945965][   T11]  ? kthread_affine_node (kernel/kthread.c:381)


Finger prints:
ovs_dp_masks_rebalance:process_one_work:worker_thread:kthread:ret_from_fork