rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (2 ticks this GP) idle=5e04/1/0x40000002 softirq=4051/4051 fqs=0
rcu: 	(detected by 0, t=30006 jiffies, g=5669, q=704 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
rcu: rcu_preempt kthread timer wakeup didn't happen for 30005 jiffies! g5669 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=7240
rcu: rcu_preempt kthread starved for 30006 jiffies! g5669 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: 
[<81a52c64>] (__schedule) from [<81a53be8>] (__schedule_loop kernel/sched/core.c:6845 [inline])
[<81a52c64>] (__schedule) from [<81a53be8>] (schedule+0x2c/0x130 kernel/sched/core.c:6860)
 r10:00000001 r9:828f2d4c r8:828f2d58 r7:8323b000 r6:8323b000 r5:82804d40
 r4:8323b000
[<81a53bbc>] (schedule) from [<81a5adc4>] (schedule_timeout+0x8c/0x114 kernel/time/sleep_timeout.c:99)
 r5:82804d40 r4:00005a21
[<81a5ad38>] (schedule_timeout) from [<8030d214>] (rcu_gp_fqs_loop+0x150/0x4cc kernel/rcu/tree.c:2046)
 r6:82804d40 r5:828f2b80 r4:00000000
[<8030d0c4>] (rcu_gp_fqs_loop) from [<80311580>] (rcu_gp_kthread+0xec/0x18c kernel/rcu/tree.c:2248)
 r10:df855f4c r9:82804d40 r8:828f2b80 r7:828f2d5a r6:828f2d4c r5:828f2d58
 r4:8323b000
[<80311494>] (rcu_gp_kthread) from [<8028f07c>] (kthread+0x12c/0x280 kernel/kthread.c:464)
 r7:830b8a80
[<8028ef50>] (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 r5:8028ef50
 r4:830b5d80