参照beaglebone black制作的板子使用过程中出现偶尔死机的现象，所有log几乎相同，都是“Unable to handle kernel paging request at virtual address xxxxx”，如下：
[ 5.675222] Unable to handle kernel paging request at virtual address f9f659a4
[ 5.682835] pgd = db8f4000
[ 5.685678] [f9f659a4] *pgd=44e11452(bad)
[ 5.689909] Internal error: Oops: 8000000d [#1] ARM
[ 5.695032] Modules linked in:
[ 5.698249] CPU: 0 PID: 977 Comm: mount.sh Not tainted 3.12.10-g7efe5c7-dirty #3
[ 5.706019] task: dd7f80c0 ti: db930000 task.ti: db930000
[ 5.711697] PC is at 0xf9f659a4
[ 5.715011] LR is at ext4_attr_show+0x28/0x34
[ 5.719588] pc : [<f9f659a4>] lr : [<c01611ac>] psr: a00f0013
[ 5.719588] sp : db931e68 ip : dc8a8508 fp : db931e74
[ 5.731650] r10: db931f5c r9 : dc8a85e0 r8 : db930000
[ 5.737140] r7 : db931e90 r6 : db8c7680 r5 : db931ed8 r4 : 00000000
[ 5.743998] r3 : f9f659a6 r2 : 00000000 r1 : dc8a8508 r0 : db931ed8
[ 5.750857] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
[ 5.758352] Control: 10c5387d Table: 9b8f4019 DAC: 00000015
[ 5.764390] Process mount.sh (pid: 977, stack limit = 0xdb930240)
买的beaglebone black板子没有死机情况。
请教大家，该从哪方面下手查找问题原因啊？
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