内核出错，求助。。。

虽然是android内核，不过我只想都是linux问题不大吧，我想知道应该从哪里入手
##### EmbedSky BIOS for SKY2440/TQ2440 #####
Press Space key to Download Mode !
Booting Linux ...
Copy linux kernel from 0x00200000 to 0x30008000, size = 0x00300000 ... Copy Kernel to SDRAM done,NOW, Booting Linux......
Uncompressing Linux....................................................................................................... done, booting the kernel.
Linux version 2.6.25-amateuryy (root@ubuntu) (gcc version 4.3.3 (Sourcery G++ Lite 2009q1-176) ) #1 Mon Feb 13 19:45:04 CST 2012
CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177
Machine: SMDK2440
ATAG_INITRD is deprecated; please update your bootloader.
Memory policy: ECC disabled, Data cache writeback
CPU S3C2440A (id 0x32440001)
S3C244X: core 400.000 MHz, memory 100.000 MHz, peripheral 50.000 MHz
S3C24XX Clocks, (c) 2004 Simtec Electronics
CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on
CPU0: D VIVT write-back cache
CPU0: I cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets
CPU0: D cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256
Kernel command line: noinitrd root=/dev/mtdblock2 init=/init console=ttySAC0
irq: clearing pending ext status 00080000
irq: clearing subpending status 00000002
PID hash table entries: 256 (order: 8, 1024 bytes)
timer tcon=00500000, tcnt a2c1, tcfg 00000200,00000000, usec 00001eb8
Console: colour dummy device 80x30
console [ttySAC0] enabled
Unable to handle kernel NULL pointer dereference at virtual address 00000080
Unable to handle kernel paging request at virtual address fffffffc
pgd = c0004000
[fffffffc] *pgd=30002031, *pte=00000000, *ppte=00000000
Internal error: Oops: 17 [#1]
Modules linked in:
CPU: 0    Not tainted  (2.6.25-amateuryy #1)
PC is at scheduler_tick+0xc8/0x274
LR is at 0x20
pc : [<c004e658>]    lr : [<00000020>]    psr: 600000d3
sp : c030f958  ip : 00000000  fp : c030f99c
r10: c03155b4  r9 : c0327458  r8 : 00000050
r7 : ffffffd8  r6 : fffffbff  r5 : fffffc00  r4 : c0326a3c
r3 : 0000000f  r2 : 0fffffc0  r1 : 00000005  r0 : fffffc0f
Flags: nZCv  IRQs off  FIQs off  Mode SVC_32  ISA ARM  Segment kernel
Control: c000717f  Table: 30004000  DAC: 00000017
Process swapper (pid: 0, stack limit = 0xc030e268)
Stack: (0xc030f958 to 0xc0310000)
....................................

我看别人成功启动的是Dentry这里，不知道应该从哪里入手呢？谢谢
Console: colour dummy device 80x30
console [ttySAC0] enabled
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

亲，这个地方是时间片的设置哦，好像是内存溢出了。