rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (2 ticks this GP) idle=b5ec/1/0x40000002 softirq=14415/14415 fqs=0
rcu: 	(detected by 0, t=30002 jiffies, g=24597, q=560 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
rcu: rcu_preempt kthread timer wakeup didn't happen for 30001 jiffies! g24597 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=12001
rcu: rcu_preempt kthread starved for 30002 jiffies! g24597 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:0     pid:15    tgid:15    ppid:2      task_flags:0x208040 flags:0x00000000
Call trace: 
[<81a2f898>] (__schedule) from [<81a30820>] (__schedule_loop kernel/sched/core.c:6868 [inline])
[<81a2f898>] (__schedule) from [<81a30820>] (schedule+0x2c/0x130 kernel/sched/core.c:6883)
 r10:00000001 r9:828f0ecc r8:828f0ed8 r7:83243000 r6:83243000 r5:82804d40
 r4:83243000
[<81a307f4>] (schedule) from [<81a37b6c>] (schedule_timeout+0x8c/0x114 kernel/time/sleep_timeout.c:99)
 r5:82804d40 r4:00003637
[<81a37ae0>] (schedule_timeout) from [<803056c0>] (rcu_gp_fqs_loop+0x150/0x4cc kernel/rcu/tree.c:2054)
 r6:82804d40 r5:828f0d00 r4:00000000
[<80305570>] (rcu_gp_fqs_loop) from [<80309a88>] (rcu_gp_kthread+0xec/0x18c kernel/rcu/tree.c:2256)
 r10:df855f4c r9:82804d40 r8:828f0d00 r7:828f0eda r6:828f0ecc r5:828f0ed8
 r4:83243000
[<8030999c>] (rcu_gp_kthread) from [<80285f1c>] (kthread+0x12c/0x280 kernel/kthread.c:464)
 r7:830b8a80
[<80285df0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137)
Exception stack(0xdf855fb0 to 0xdf855ff8)
5fa0:                                     00000000 00000000 00000000 00000000
5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80285df0
 r4:830b6d40