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楼主  发表于: 2011-04-28 11:34

 为什么2.6.38内核不能通过nfs挂根文件?(2.6.32内核可以)

U-Boot 2010.06 (Apr 21 2011 - 00:17:24)

I2C:   ready
DRAM:  64 MiB
Flash: 2 MiB
NAND:  64 MiB
Video: 240x320x16 20kHz 62Hz
In:    serial
Out:   serial
Err:   serial
USB slave is enable!
Net:   dm9000
U-Boot 2010.06 (Apr 21 2011 - 00:17:24)
for mini2440 !!
Hit any key to stop autoboot:  0
dm9000 i/o: 0x20000300, id: 0x90000a46
DM9000: running in 16 bit mode
MAC: 00:08:11:18:12:27
operating at 100M full duplex mode
Using dm9000 device
File transfer via NFS from server 192.168.1.69; our IP address is 192.168.1.222
Filename '/home/nfs/uImage'.
Load address: 0x30010000
Loading: #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         ###################################
done
Bytes transferred = 2175452 (2131dc hex)
## Booting kernel from Legacy Image at 30010000 ...
   Image Name:   Linux-2.6.38.4
   Created:      2011-04-22  18:02:29 UTC
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    2175388 Bytes = 2.1 MiB
   Load Address: 30008000
   Entry Point:  30008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.
Linux version 2.6.38.4 (root@debian5) (gcc version 4.3.2 (Sourcery G++ Lite 2008q3-72) ) #3 Sat Apr 23 02:02:07 CST 2011
CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177
CPU: VIVT data cache, VIVT instruction cache
Machine: MINI2440
Memory policy: ECC disabled, Data cache writeback
CPU S3C2440A (id 0x32440001)
S3C24XX Clocks, Copyright 2004 Simtec Electronics
S3C244X: core 405.000 MHz, memory 101.250 MHz, peripheral 50.625 MHz
CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256
Kernel command line: noinitrd root=/dev/nfs rw nfsroot=192.168.1.69:/home/nfs ip=192.168.1.222:192.168.1.69::255.255.255.0 console=ttySAC0,115200 init=/linuxrc mem=64M
PID hash table entries: 256 (order: -2, 1024 bytes)
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: 60396k/60396k available, 5140k reserved, 0K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    DMA     : 0xffc00000 - 0xffe00000   (   2 MB)
    vmalloc : 0xc4800000 - 0xf6000000   ( 792 MB)
    lowmem  : 0xc0000000 - 0xc4000000   (  64 MB)
    modules : 0xbf000000 - 0xc0000000   (  16 MB)
      .init : 0xc0008000 - 0xc0029000   ( 132 kB)
      .text : 0xc0029000 - 0xc0409790   (3970 kB)
      .data : 0xc040a000 - 0xc04316a0   ( 158 kB)
SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
NR_IRQS:85
irq: clearing pending status 02000000
irq: clearing subpending status 00000002
Console: colour dummy device 80x30
console [ttySAC0] enabled
Calibrating delay loop... 201.93 BogoMIPS (lpj=504832)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
gpiochip_add: gpios 288..303 (GPIOK) failed to register
gpiochip_add: gpios 320..334 (GPIOL) failed to register
gpiochip_add: gpios 352..353 (GPIOM) failed to register
NET: Registered protocol family 16
MINI2440: Option string mini2440=0tb
MINI2440: 't' ignored, touchscreen not compiled in
MINI2440: LCD [0:240x320] 1:800x480 2:1024x768
S3C2440: Initialising architecture
S3C2440: IRQ Support
S3C244X: Clock Support, DVS off
bio: create slab <bio-0> at 0
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
s3c-i2c s3c2440-i2c: slave address 0x10
s3c-i2c s3c2440-i2c: bus frequency set to 98 KHz
s3c-i2c s3c2440-i2c: i2c-0: S3C I2C adapter
Advanced Linux Sound Architecture Driver Version 1.0.23.
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
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
JFFS2 version 2.2. (NAND) ? 2001-2006 Red Hat, Inc.
ROMFS MTD (C) 2007 Red Hat, Inc.
msgmni has been set to 117
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
Console: switching to colour frame buffer device 60x53
fb0: s3c2410fb frame buffer device
s3c2440-uart.0: ttySAC0 at MMIO 0x50000000 (irq = 70) is a S3C2440
s3c2440-uart.1: ttySAC1 at MMIO 0x50004000 (irq = 73) is a S3C2440
s3c2440-uart.2: ttySAC2 at MMIO 0x50008000 (irq = 76) is a S3C2440
brd: module loaded
at24 0-0050: 1024 byte 24c08 EEPROM, writable, 16 bytes/write
S3C24XX NAND Driver, (c) 2004 Simtec Electronics
s3c24xx-nand s3c2440-nand: Tacls=1, 9ns Twrph0=3 29ns, Twrph1=2 19ns
s3c24xx-nand s3c2440-nand: NAND soft ECC
NAND device: Manufacturer ID: 0xec, Chip ID: 0x76 (Samsung NAND 64MiB 3,3V 8-bit)
Creating 4 MTD partitions on "nand":
0x000000000000-0x000000060000 : "u-boot"
0x000000060000-0x000000080000 : "u-boot-env"
0x000000080000-0x000000580000 : "kernel"
0x000000580000-0x000004000000 : "root"
dm9000 Ethernet Driver, V1.31
eth0: dm9000e at c486a300,c486e304 IRQ 51 MAC: 00:08:11:18:12:27 (chip)
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
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
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
usbcore: registered new interface driver libusual
s3c2440-usbgadget s3c2440-usbgadget: S3C2440: increasing FIFO to 128 bytes
mousedev: PS/2 mouse device common for all mice
input: gpio-keys as /devices/platform/gpio-keys/input/input0
S3C24XX RTC, (c) 2004,2006 Simtec Electronics
s3c-rtc s3c2410-rtc: rtc disabled, re-enabling
s3c-rtc s3c2410-rtc: rtc core: registered s3c as rtc0
s3c-rtc s3c2410-rtc: warning: invalid RTC value so initializing it
i2c /dev entries driver
Linux video capture interface: v2.00
S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics
s3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq enabled
cpuidle: using governor ladder
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
s3c-sdi s3c2440-sdi: powered down.
s3c-sdi s3c2440-sdi: mmc0 - using pio, sw SDIO IRQ
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
ALSA device list:
  No soundcards found.
TCP cubic registered
NET: Registered protocol family 17
Registering the dns_resolver key type
s3c-rtc s3c2410-rtc: setting system clock to 2000-01-01 00:00:00 UTC (946684800)
eth0: link down
IP-Config: Complete:
     device=eth0, addr=192.168.1.222, mask=255.255.255.0, gw=255.255.255.255,
     host=192.168.1.222, domain=, nis-domain=(none),
     bootserver=192.168.1.69, rootserver=192.168.1.69, rootpath=
eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
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             384 mtdblock0  (driver?)
1f01             128 mtdblock1  (driver?)
1f02            5120 mtdblock2  (driver?)
1f03           59904 mtdblock3  (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[<c002e938>] (unwind_backtrace+0x0/0xec) from [<c0301cf0>] (panic+0x54/0x180)
[<c0301cf0>] (panic+0x54/0x180) from [<c0008eb4>] (mount_block_root+0x1d0/0x210)
[<c0008eb4>] (mount_block_root+0x1d0/0x210) from [<c0008f94>] (mount_root+0xa0/0xc0)
[<c0008f94>] (mount_root+0xa0/0xc0) from [<c0009118>] (prepare_namespace+0x164/0x1bc)
[<c0009118>] (prepare_namespace+0x164/0x1bc) from [<c000843c>] (kernel_init+0x104/0x144)
[<c000843c>] (kernel_init+0x104/0x144) from [<c002a978>] (kernel_thread_exit+0x0/0x8)