有几台设备偶发启动异常，复现并抓开机log看，每次出问题好像不一样：
log1
[ 7.048754] ------------[ cut here ]------------
[ 7.048758] kernel BUG at mm/slab.c:2975!
[ 7.048761] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
[ 7.048769] Modules linked in:
[ 7.048776] CPU: 2 PID: 6 Comm: kworker/u8:0 Not tainted 3.10.65 #1
[ 7.048799] Workqueue: khelper __call_usermodehelper
[ 7.048803] task: e48dc480 ti: e48f6000 task.ti: e48f6000
[ 7.048813] PC is at cache_alloc_refill+0x84/0x7a8
[ 7.048818] LR is at cache_alloc_refill+0x38/0x7a8
[ 7.048824] pc : [<c00fd2c8>] lr : [<c00fd27c>] psr: 20000093
[ 7.048824] sp : e48f7d88 ip : e48f7d88 fp : e48f7dcc
[ 7.048827] r10: e4b98ab4 r9 : 00000000 r8 : 00000010
[ 7.048832] r7 : 00000000 r6 : e496e140 r5 : 000000d0 r4 : e4829600
[ 7.048835] r3 : 00000001 r2 : 00000000 r1 : 000000d0 r0 : 00000026
[ 7.048841] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 7.048846] Control: 10c53c7d Table: 6422006a DAC: 00000015
log2
[20:39:04][ 4.677397] sunxi-ohci 1c14000.ohci0-controller: SW USB2.0 'Open' Host Controller (OHCI) Driver
[20:39:04][ 4.687110] sunxi-ohci 1c14000.ohci0-controller: new USB bus registered, assigned bus number 3
[20:39:04][ 4.696761] sunxi-ohci 1c14000.ohci0-controller: irq 72, io mem 0xc0359f34
[20:39:04][ 4.730018] Internal error: Oops - undefined instruction: 0 [#1] PREEMPT SMP ARM
[20:39:04][ 4.738098] Modules linked in:
[20:39:04][ 4.740001] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 3.10.65 #1
[20:39:04][ 4.740001] task: e48fa080 ti: e4956000 task.ti: e4956000
[20:39:04][ 4.740001] PC is at ktime_get_update_offsets+0x28/0x10c
[20:39:04][ 4.740001] LR is at hrtimer_interrupt+0x88/0x2a8
[20:39:04][ 4.764088] usb usb3: New USB device found, idVendor=1d6b, idProduct=0001
[20:39:04][ 4.764094] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[20:39:04][ 4.764099] usb usb3: Product: SW USB2.0 'Open' Host Controller (OHCI) Driver
[20:39:04][ 4.764104] usb usb3: Manufacturer: Linux 3.10.65 ohci_hcd
[20:39:04][ 4.764109] usb usb3: SerialNumber: sunxi-ohci
[20:39:04][ 4.764164] pc : [<c0069f8c>] lr : [<c0049840>] psr: 60000193
[20:39:04][ 4.764164] sp : e4957e28 ip : e4957e80 fp : e4957e7c
[20:39:04][ 4.764164] r10: c2197708 r9 : c2197740 r8 : 0000001d
[20:39:04][ 4.764164] r7 : c219c8c0 r6 : ffffffff r5 : 7fffffff r4 : c0af2a00
[20:39:04][ 4.764164] r3 : c2197740 r2 : c2197708 r1 : c21976d0 r0 : 64957ea0
[20:39:04][ 4.764164] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel
[20:39:04][ 4.764164] Control: 10c53c7d Table: 4000406a DAC: 00000015
log3
[ 7.085083] kernel BUG at kernel/hrtimer.c:1287!
[ 7.090008] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
[ 7.090008] Modules linked in:
[ 7.090008] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.10.65 #1
[ 7.090008] task: e48fa900 ti: e4952000 task.ti: e4952000
[ 7.090008] PC is at __run_hrtimer+0xf0/0x224
[ 7.090008] LR is at _raw_spin_lock+0x20/0x5c
[ 7.090008] pc : [<c0048e44>] lr : [<c064c718>] psr: 80000193
[ 7.090008] sp : e4953e50 ip : e4953e38 fp : e4953e7c
[ 7.090008] r10: c00712dc r9 : 00000001 r8 : c2185630
[ 7.090008] r7 : c2185668 r6 : ffffffff r5 : c2185630 r4 : c2185808
[ 7.090008] r3 : 00000001 r2 : 0000037a r1 : 00000000 r0 : 00000002
[ 7.090008] Flags: Nzcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 7.090008] Control: 10c53c7d Table: 4000406a DAC: 00000015
log4
[ 0.840711] [DISP] disp_sys_power_enable,line:445:some error happen, fail to get regulator vcc-lcd
[ 0.849736] Unable to handle kernel NULL pointer dereference at virtual address 00000094
[ 0.860018] pgd = c0004000
[ 0.862762] [00000094] *pgd=00000000
[ 0.866374] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[ 0.870000] Modules linked in:
[ 0.870000] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 3.10.65 #1
[ 0.870000] task: e48dd9c0 ti: e48de000 task.ti: e48de000
[ 0.870000] PC is at __blocking_notifier_call_chain+0x18/0x6c
[ 0.870000] LR is at blocking_notifier_call_chain+0x28/0x30
[ 0.870000] pc : [<c004b268>] lr : [<c004b2e4>] psr: a0000013
[ 0.870000] sp : e48dfdc0 ip : e48dfdf0 fp : e48dfdec
[ 0.870000] r10: 00000000 r9 : c0ace840 r8 : c09cf3bc
[ 0.870000] r7 : 00000000 r6 : 00000001 r5 : c0b37f7c r4 : e4a99010
[ 0.870000] r3 : ffffffff r2 : e4a99010 r1 : 00000004 r0 : 00000084
[ 0.870000] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 0.870000] Control: 10c53c7d Table: 4000406a DAC: 00000015
log5
[ 4.955191] sunxi-ohci 1c1c000.ohci2-controller: SW USB2.0 'Open' Host Controller (OHCI) Driver
[ 4.964889] sunxi-ohci 1c1c000.ohci2-controller: new USB bus registered, assigned bus number 4
[ 4.974516] sunxi-ohci 1c1c000.ohci2-controller: irq 97, io mem 0xc0359f34
[ 5.030018] Unable to handle kernel paging request at virtual address ffffffff
[ 5.037909] pgd = c0004000
[ 5.040001] [ffffffff] *pgd=64fee821, *pte=00000000, *ppte=00000000
[ 5.040001] Internal error: Oops: 17 [#1] PREEMPT SMP ARM
[ 5.040001] Modules linked in:
[ 5.040001] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.65 #1
[ 5.040001] task: c09b8448 ti: c09a8000 task.ti: c09a8000
[ 5.040001] PC is at ktime_get_update_offsets+0x1c/0x10c
[ 5.040001] LR is at hrtimer_interrupt+0x88/0x2a8
[ 5.040001] pc : [<c0069f80>] lr : [<c0049840>] psr: 60000193
[ 5.040001] sp : c09a9dd8 ip : c09a9e30 fp : c09a9e2c
[ 5.040001] r10: c217c708 r9 : c217c740 r8 : 0000001d
[ 5.040001] r7 : c21818c0 r6 : ffffffff r5 : 7fffffff r4 : c0af2a00
[ 5.040001] r3 : c217c740 r2 : c217c708 r1 : c217c6d0 r0 : c09a9e50
[ 5.040001] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 5.040001] Control: 10c53c7d Table: 4000406a DAC: 00000015
log6
[ 4.607392] sunxi-ohci 1c14000.ohci0-controller: SW USB2.0 'Open' Host Controller (OHCI) Driver
[ 4.617168] sunxi-ohci 1c14000.ohci0-controller: new USB bus registered, assigned bus number 3
[ 4.626822] sunxi-ohci 1c14000.ohci0-controller: irq 72, io mem 0xc0359f34
[ 4.650017] Unable to handle kernel paging request at virtual address 6ce8efdf
[ 4.657906] pgd = c0004000
[ 4.660001] [6ce8efdf] *pgd=00000000
[ 4.660001] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[ 4.660001] Modules linked in:
[ 4.660001] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.65 #1
[ 4.660001] task: c09b8448 ti: c09a8000 task.ti: c09a8000
[ 4.660001] PC is at account_process_tick+0x4c/0xa4
[ 4.660001] LR is at account_process_tick+0x20/0xa4
[ 4.660001] pc : [<c00574ac>] lr : [<c0057480>] psr: 60000193
[ 4.660001] sp : c09a9d80 ip : c09a9d80 fp : c09a9d9c
[ 4.660001] r10: c00712dc r9 : c09a9e58 r8 : c217c630
[ 4.660001] r7 : 00000000 r6 : 00000000 r5 : c09b8448 r4 : 6ce8eb6b
[ 4.660001] r3 : 017d8000 r2 : 00000cdd r1 : 00000000 r0 : 00000000
[ 4.660001] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 4.660001] Control: 10c53c7d Table: 4000406a DAC: 00000015