nfs启动linux系统出现如下错误

OpenJTAG> tftpboot 0x31000000 uImage

dm9000 i/o: 0x20000000, id: 0x90000a46

DM9000: running in 16 bit mode

MAC: 08:00:3e:26:0a:5b

could not establish link

TFTP from server 192.168.1.100; our IP address is 192.168.1.66

Filename 'uImage'.

Load address: 0x31000000

Loading: #################################################################

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#################################################################

##########################

done

Bytes transferred = 1795388 (1b653c hex)

OpenJTAG> bootm 0x31000000

## Booting image at 31000000 ...

Image Name: Linux-2.6.22.6

Created: 2014-05-02 2:32:16 UTC

Image Type: ARM Linux Kernel Image (uncompressed)

Data Size: 1795324 Bytes = 1.7 MB

Load Address: 30008000

Entry Point: 30008000

Verifying Checksum ... OK

OK

Starting kernel ...

Uncompressing Linux................................................................................................................... done, booting the kernel.

Linux version 2.6.22.6 (book@book-desktop) (gcc version 3.4.5) #11 Fri May 2 10:32:05 CST 2014

CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177

Machine: SMDK2440

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. Total pages: 16256

Kernel command line: root=/dev/nfs rw nfsroot=192.168.1.100:/home/book/Videos/rootfs/ ip=192.168.1.66 console=ttySAC0 mem=64M

irq: clearing subpending status 00000003

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

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory: 64MB = 64MB total

Memory: 61092KB available (3172K code, 449K data, 128K init)

Mount-cache hash table entries: 512

CPU: Testing write buffer coherency: ok

NET: Registered protocol family 16

S3C2410 Power Management, (c) 2004 Simtec Electronics

S3C2440: Initialising architecture

S3C2440: IRQ Support

S3C2440: Clock Support, DVS off

S3C24XX DMA Driver, (c) 2003-2004,2006 Simtec Electronics

DMA channel 0 at c4800000, irq 33

DMA channel 1 at c4800040, irq 34

DMA channel 2 at c4800080, irq 35

DMA channel 3 at c48000c0, irq 36

SCSI subsystem initialized

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

TCP reno registered

NetWinder Floating Point Emulator V0.97 (double precision)

Registering GDB sysrq handler

JFFS2 version 2.2. (NAND) 漏 2001-2006 Red Hat, Inc.

yaffs May 1 2014 19:20:13 Installing.

io scheduler noop registered

io scheduler anticipatory registered (default)

io scheduler deadline registered

io scheduler cfq registered

lp: driver loaded but no devices found

ppdev: user-space parallel port driver

S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics

Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled

s3c2440-uart.0: s3c2410_serial0 at MMIO map 0x50000000 mem 0xf0400000 (irq = 70) is a S3C2440

s3c2440-uart.1: s3c2410_serial1 at MMIO map 0x50004000 mem 0xf0404000 (irq = 73) is a S3C2440

s3c2440-uart.2: s3c2410_serial2 at MMIO map 0x50008000 mem 0xf0408000 (irq = 76) is a S3C2440

RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize

loop: module loaded

line 400 <DM9KS> I/O: c486a000, VID: 90000a46

line 408 <DM9KS> I/O: c486a000, VID: 90000a46

<DM9KS> error version, chip_revision = 0x1, chip_info = 0x1

id_val=0

S3C24XX NAND Driver, (c) 2004 Simtec Electronics

s3c2440-nand s3c2440-nand: Tacls=3, 30ns Twrph0=7 70ns, Twrph1=3 30ns

NAND device: Manufacturer ID: 0xec, Chip ID: 0x76 (Samsung NAND 64MiB 3,3V 8-bit)

Scanning device for bad blocks

Creating 4 MTD partitions on "NAND 64MiB 3,3V 8-bit":

0x00000000-0x00040000 : "bootloader"

0x00040000-0x00060000 : "params"

0x00060000-0x00260000 : "kernel"

0x00260000-0x04000000 : "root"

s3c2410-ohci s3c2410-ohci: S3C24XX OHCI

s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1

s3c2410-ohci s3c2410-ohci: irq 42, io mem 0x49000000

usb usb1: configuration #1 chosen from 1 choice

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 2 ports detected

Initializing USB Mass Storage driver...

usbcore: registered new interface driver usb-storage

USB Mass Storage support registered.

mice: PS/2 mouse device common for all mice

s3c2410 TouchScreen successfully loaded

input: s3c2410 TouchScreen as /class/input/input0

S3C24XX RTC, (c) 2004,2006 Simtec Electronics

mapped channel 0 to 0

s3c2440-sdi s3c2440-sdi: powered down.

s3c2440-sdi s3c2440-sdi: initialisation done.

s3c2440-sdi s3c2440-sdi: running at 0kHz (requested: 0kHz).

s3c2440-sdi s3c2440-sdi: running at 196kHz (requested: 195kHz).

s3c2440-sdi s3c2440-sdi: running at 196kHz (requested: 195kHz).

s3c2440-sdi s3c2440-sdi: running at 196kHz (requested: 195kHz).

usbcore: registered new interface driver hiddev

s3c2440-sdi s3c2440-sdi: CMD[TIMEOUT] #2 op:UNKNOWN(8) arg:0x000001aa flags:0x0875 retries:0 Status:nothing to complete

usbcore: registered new interface driver usbhid

s3c2440-sdi s3c2440-sdi: CMD[TIMEOUT] #3 op:APP_CMD(55) arg:0x00000000 flags:0x0875 retries:0 Status:nothing to complete

drivers/hid/usbhid/hid-core.c: v2.6:USB HID core driver

Advanced Linux Sound Architecture Driver Version 1.0.14 (Thu May 31 09:03:25 2007 UTC).

ASoC version 0.13.1

s3c2440-sdi s3c2440-sdi: CMD[TIMEOUT] #4 op:APP_CMD(55) arg:0x00000000 flags:0x0875 retries:0 Status:nothing to complete

s3c2440-sdi s3c2440-sdi: CMD[TIMEOUT] #5 op:APP_CMD(55) arg:0x00000000 flags:0x0875 retries:0 Status:nothing to complete

s3c2410iis_probe...

s3c2440-sdi s3c2440-sdi: CMD[TIMEOUT] #6 op:APP_CMD(55) arg:0x00000000 flags:0x0875 retries:0 Status:nothing to complete

s3c2440-sdi s3c2440-sdi: CMD[TIMEOUT] #7 op:ALL_SEND_OCR(1) arg:0x00000000 flags:0x0861 retries:0 Status:nothing to complete

s3c2440-sdi s3c2440-sdi: powered down.

UDA1341 audio driver initialized

ALSA device list:

No soundcards found.

TCP cubic registered

NET: Registered protocol family 1

drivers/rtc/hctosys.c: unable to open rtc device (rtc0)

IP-Config: Guessing netmask 255.255.255.0

IP-Config: Complete:

device=eth0, addr=192.168.1.66, mask=255.255.255.0, gw=255.255.255.255,

host=192.168.1.66, domain=, nis-domain=(none),

bootserver=255.255.255.255, rootserver=192.168.1.100, rootpath=

Looking up port of RPC 100003/2 on 192.168.1.100

rpcbind: server 192.168.1.100 not responding, timed out

Root-NFS: Unable to get nfsd port number from server, using default

Looking up port of RPC 100005/1 on 192.168.1.100

rpcbind: server 192.168.1.100 not responding, timed out

Root-NFS: Unable to get mountd port number from server, using default

mount: server 192.168.1.100 not responding, timed out

Root-NFS: Server returned error -5 while mounting /home/book/Videos/rootfs/

VFS: Unable to mount root fs via NFS, trying floppy.

VFS: Cannot open root device "nfs" or unknown-block(2,0)

Please append a correct "root=" boot option; here are the available partitions:

1f00 256 mtdblock0 (driver?)

1f01 128 mtdblock1 (driver?)

1f02 2048 mtdblock2 (driver?)

1f03 63104 mtdblock3 (driver?)

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)

提示宿主机没有响应，内核是支持nfs文件系统的，只是我的文件系统是ramdisk文件系统，应该也支持才对啊，并且宿主机nfs 服务已经打开了，怎么回事呢？

已解决，server 192.168.1.100应该是虚拟机ubuntu的ip地址才对，由于改成了xp的ip地址，所以开发板一直连接不上nfs文件系统