rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=1d34/1/0x40000002 softirq=24335/24335 fqs=0
rcu: 	(detected by 1, t=30002 jiffies, g=44537, q=267 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
rcu: rcu_preempt kthread timer wakeup didn't happen for 30001 jiffies! g44537 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=36193
rcu: rcu_preempt kthread starved for 30002 jiffies! g44537 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
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: 
[<81a6429c>] (__schedule) from [<81a65230>] (__schedule_loop kernel/sched/core.c:7011 [inline])
[<81a6429c>] (__schedule) from [<81a65230>] (schedule+0x2c/0x130 kernel/sched/core.c:7026)
 r10:00000001 r9:828efbcc r8:828efbd8 r7:83213000 r6:83213000 r5:82804d40
 r4:83213000
[<81a65204>] (schedule) from [<81a6ced4>] (schedule_timeout+0x8c/0x114 kernel/time/sleep_timeout.c:99)
 r5:82804d40 r4:00009aec
[<81a6ce48>] (schedule_timeout) from [<803011d0>] (rcu_gp_fqs_loop+0x150/0x4cc kernel/rcu/tree.c:2083)
 r6:82804d40 r5:828efa00 r4:00000000
[<80301080>] (rcu_gp_fqs_loop) from [<80305598>] (rcu_gp_kthread+0xec/0x18c kernel/rcu/tree.c:2285)
 r10:df855f4c r9:82804d40 r8:828efa00 r7:828efbda r6:828efbcc r5:828efbd8
 r4:83213000
[<803054ac>] (rcu_gp_kthread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463)
 r7:830baa00
[<802800e0>] (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 r5:802800e0
 r4:830b6f00