求助，关于使用nfs挂载根文件系统到问题

jacsy

系统在启动到过程中总是出现这个错误

1. ALSA device list:
   
2.   No soundcards found.
   
3. TCP cubic registered
   
4. NET: Registered protocol family 17
   
5. Registering the dns_resolver key type
   
6. drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
   
7. eth0: link down
   
8. IP-Config: Complete:
   
9.      device=eth0, addr=192.168.10.102, mask=255.255.255.0, gw=192.168.10.1,
   
10.      host=192.168.10.102, domain=, nis-domain=(none),
    
11.      bootserver=192.168.10.100, rootserver=192.168.10.100, rootpath=
    
12. eth0: link up, 100Mbps, full-duplex, lpa 0x4DE1
    
13. VFS: Unable to mount root fs via NFS, trying floppy.
    
14. VFS: Cannot open root device "nfs" or unknown-block(2,0)
    
15. Please append a correct "root=" boot option; here are the available partitions:
    
16. 1f00             256 mtdblock0  (driver?)
    
17. 1f01             256 mtdblock1  (driver?)
    
18. 1f02            5120 mtdblock2  (driver?)
    
19. 1f03          256512 mtdblock3  (driver?)
    
20. 1f04          262144 mtdblock4  (driver?)
    

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请问各位大侠，这个问题怎么解决？


nfs服务器是可用到

1. acsy@jacsy-PC$ ls /mnt/
   
2. jacsy@jacsy-PC$ sudo mount -t nfs 192.168.10.100:/home/rootfs /mnt
   
3. [sudo] password for jacsy:
   
4. jacsy@jacsy-PC$ ls /mnt/
   
5. bin  dev  etc  home  lib  linuxrc  mnt  proc  root  sbin  sys  tmp  usr  var
   
6. jacsy@jacsy-PC$

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附内核启动信息

1. Starting kernel ...
   
2. 
   
3. Uncompressing Linux... done, booting the kernel.
   
4. Linux version 2.6.37.6 (jacsy@jacsy-PC) (gcc version 4.4.5 (crosstool-NG-1.9.3) ) #21 Sat Aug 6 20:23:18 CST 2011
   
5. CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177
   
6. CPU: VIVT data cache, VIVT instruction cache
   
7. Machine: MINI2440
   
8. Memory policy: ECC disabled, Data cache writeback
   
9. CPU S3C2440A (id 0x32440001)
   
10. S3C24XX Clocks, Copyright 2004 Simtec Electronics
    
11. S3C244X: core 405.000 MHz, memory 101.250 MHz, peripheral 50.625 MHz
    
12. CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on
    
13. Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256
    
14. Kernel command line: noinitrd init=/linuxrc console=ttySAC0 root=/dev/nfs rw nfsroot=192.168.10.100:/home/rootfs, nolock ip=192.168.10.102:192.168.10.100:192.168.10.1:255.255.255.0::eth0:off mem=64M
    
15. PID hash table entries: 256 (order: -2, 1024 bytes)
    
16. Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
    
17. Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
    
18. Memory: 64MB = 64MB total
    
19. Memory: 60524k/60524k available, 5012k reserved, 0K highmem
    
20. Virtual kernel memory layout:
    
21.     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    
22.     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    
23.     DMA     : 0xffc00000 - 0xffe00000   (   2 MB)
    
24.     vmalloc : 0xc4800000 - 0xf6000000   ( 792 MB)
    
25.     lowmem  : 0xc0000000 - 0xc4000000   (  64 MB)
    
26.     modules : 0xbf000000 - 0xc0000000   (  16 MB)
    
27.       .init : 0xc0008000 - 0xc0029000   ( 132 kB)
    
28.       .text : 0xc0029000 - 0xc03e7678   (3834 kB)
    
29.       .data : 0xc03e8000 - 0xc040b2c0   ( 141 kB)
    
30. SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
    
31. NR_IRQS:85
    
32. irq: clearing pending status 02000000
    
33. irq: clearing subpending status 00000003
    
34. irq: clearing subpending status 00000002
    
35. Console: colour dummy device 80x30
    
36. console [ttySAC0] enabled
    
37. Calibrating delay loop... 201.93 BogoMIPS (lpj=504832)
    
38. pid_max: default: 32768 minimum: 301
    
39. Mount-cache hash table entries: 512
    
40. CPU: Testing write buffer coherency: ok
    
41. gpiochip_add: gpios 288..303 (GPIOK) failed to register
    
42. gpiochip_add: gpios 320.
    
43.                         s3c2440-uart.0: s3c2410_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2440
    
44. s3c2440-uart.1: s3c2410_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2440
    
45. s3c2440-uart.2: s3c2410_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2440
    
46. brd: module loaded
    
47. nbd: registered device at major 43
    
48. S3C24XX NAND Driver, (c) 2004 Simtec Electronics
    
49. s3c24xx-nand s3c2440-nand: Tacls=3, 29ns Twrph0=7 69ns, Twrph1=3 29ns
    
50. s3c24xx-nand s3c2440-nand: NAND soft ECC
    
51. NAND device: Manufacturer ID: 0xec, Chip ID: 0xda (Samsung )
    
52. Scanning device for bad blocks
    
53. Bad eraseblock 334 at 0x0000029c0000
    
54. Creating 5 MTD partitions on "NAND":
    
55. 0x000000000000-0x000000040000 : "bootloader"
    
56. 0x000000040000-0x000000080000 : "parameters"
    
57. uncorrectable error :
    
58. 0x000000080000-0x000000580000 : "kernel"
    
59. uncorrectable error :
    
60. 0x000000580000-0x000040580000 : "root file system"
    
61. mtd: partition "root file system" extends beyond the end of device "NAND" -- size truncated to 0xfa80000
    
62. ftl_cs: FTL header not found.
    
63. 0x000000000000-0x000040000000 : "whole nand flash"
    
64. mtd: partition "whole nand flash" extends beyond the end of device "NAND" -- size truncated to 0x10000000
    
65. dm9000 Ethernet Driver, V1.31
    
66. eth0: dm9000e at c481c300,c4820304 IRQ 51 MAC: 00:08:11:18:12:27 (platform data)
    
67. ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
    
68. s3c2410-ohci s3c2410-ohci: S3C24XX OHCI
    
69. s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1
    
70. s3c2410-ohci s3c2410-ohci: irq 42, io mem 0x49000000
    
71. hub 1-0:1.0: USB hub found
    
72. hub 1-0:1.0: 2 ports detected
    
73. usbcore: registered new interface driver libusual
    
74. mice: PS/2 mouse device common for all mice
    
75. S3C24XX RTC, (c) 2004,2006 Simtec Electronics
    
76. i2c /dev entries driver
    
77. S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics
    
78. s3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq enabled
    
79. cpuidle: using governor ladder
    
80. sdhci: Secure Digital Host Controller Interface driver
    
81. sdhci: Copyright(c) Pierre Ossman
    
82. usbcore: registered new interface driver usbhid
    
83. usbhid: USB HID core driver
    
84. ALSA device list:
    
85.   No soundcards found.
    
86. TCP cubic registered
    
87. NET: Registered protocol family 17
    
88. Registering the dns_resolver key type
    
89. drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
    
90. eth0: link down
    
91. IP-Config: Complete:
    
92.      device=eth0, addr=192.168.10.102, mask=255.255.255.0, gw=192.168.10.1,
    
93.      host=192.168.10.102, domain=, nis-domain=(none),
    
94.      bootserver=192.168.10.100, rootserver=192.168.10.100, rootpath=
    
95. eth0: link up, 100Mbps, full-duplex, lpa 0x4DE1
    
96. VFS: Unable to mount root fs via NFS, trying floppy.
    
97. VFS: Cannot open root device "nfs" or unknown-block(2,0)
    
98. Please append a correct "root=" boot option; here are the available partitions:
    
99. 1f00             256 mtdblock0  (driver?)
    
100. 1f01             256 mtdblock1  (driver?)
     
101. 1f02            5120 mtdblock2  (driver?)
     
102. 1f03          256512 mtdblock3  (driver?)
     
103. 1f04          262144 mtdblock4  (driver?)
     
104. Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
     
105. [<c002e6d8>] (unwind_backtrace+0x0/0xf0) from [<c02f69ac>] (panic+0x54/0x184)
     
106. [<c02f69ac>] (panic+0x54/0x184) from [<c0008e84>] (mount_block_root+0x1c8/0x208)
     
107. [<c0008e84>] (mount_block_root+0x1c8/0x208) from [<c0008f64>] (mount_root+0xa0/0xc0)
     
108. [<c0008f64>] (mount_root+0xa0/0xc0) from [<c00090e4>] (prepare_namespace+0x160/0x1b8)
     
109. [<c00090e4>] (prepare_namespace+0x160/0x1b8) from [<c0008438>] (kernel_init+0x108/0x148)
     
110. [<c0008438>] (kernel_init+0x108/0x148) from [<c002a8f0>] (kernel_thread_exit+0x0/0x8)
     

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nazily2150

问：
1）你测试挂载的机器是不是服务器自己的机器，确保同网段可进入
2）你是使用虚拟机还是独立的PC作服务器，虚拟机的网卡链接使用桥接
3）开发板挂载的时候返回错误是立刻返回错误还是有一段延时？立刻返回证明链路通，但服务被拒绝，而有一段时间延时，就是链路不通。可能是服务器的防火墙，selinux等