linux内核nfs挂载文件系统崩溃-20220112

Question

OK

U-Boot 1.3.4 (Aug  5 2021 - 08:18:54) for x210@Flyer


CPU:  S5PV210@1000MHz(OK)
        APLL = 1000MHz, HclkMsys = 200MHz, PclkMsys = 100MHz
        MPLL = 667MHz, EPLL = 96MHz
                       HclkDsys = 166MHz, PclkDsys = 83MHz
                       HclkPsys = 133MHz, PclkPsys = 66MHz
                       SCLKA2M  = 200MHz
Serial = CLKUART
Board:   X210BV3S
DRAM:    512 MB
Flash:   8 MB
SD/MMC:  3728MB
In:      serial
Out:     serial
Err:     serial
[LEFT UP] boot mode
checking mode for fastboot ...
Hit any key to stop autoboot:  0
dm9000 i/o: 0x88000300, id: 0x90000a46
DM9000: running in 16 bit mode
MAC: 00:40:5c:26:0a:5b
operating at 100M full duplex mode
TFTP from server 192.168.199.179; our IP address is 192.168.199.188
Filename 'zImage'.
Load address: 0x30008000
Loading: #################################################################
         ###################################transmission timeout
##############################
         #################################################################
         ##############################transmission timeout
###################################
         #################################################################
         #################################################################
         #################################################################
         #transmission timeout
################################################################
         #################################################################
         ####################transmission timeout
#############################################
         ##########transmission timeout
#######################################################
         ##
done
Bytes transferred = 3668848 (0x37fb70)
Boot with zImage

Starting kernel ...



Hello, world 0.@Flyer

Uncompressing Linux... done, booting the kernel.
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 2.6.35.7+ (lanfeiye@fly-vm) (gcc version 4.4.1 (Sourcery G++ Lite 2009q3-67) ) #1 PREEMPT Wed Jan 12 22:12:04 CST 2022
[    0.000000] CPU: ARMv7 Processor [412fc082] revision 2 (ARMv7), cr=10c53c7f
[    0.000000] CPU: VIPT nonaliasing data cache, VIPT nonaliasing instruction cache
[    0.000000] Machine: SMDKV210
[    0.000000] @@@@@@@ atags_pointer not null
[    0.000000] @@@@@@@linter#####boot_params:c0000100,mdesc->boot_params:40000002
[    0.000000] Ignoring unrecognised tag 0x41001099
[    0.000000] $$$$$$$$$cmdline:root=/dev/nfs nfsroot=192.168.199.179:/opt/v210_rootfs ip=192.168.199.188:192.168.199.179:192.168.1.253:255.255.255.0::eth0:off  init=/linuxrc console=ttySAC2,115200
[    0.000000] Memory policy: ECC disabled, Data cache writeback
[    0.000000] CPU S5PV210/S5PC110 (id 0x43110220)
[    0.000000] S3C24XX Clocks, Copyright 2004 Simtec Electronics
[    0.000000] S5PV210: PLL settings, A=1000000000, M=667000000, E=96000000 V=54000000
[    0.000000] S5PV210: ARMCLK=1000000000, HCLKM=200000000, HCLKD=166750000
[    0.000000] HCLKP=133400000, PCLKM=100000000, PCLKD=83375000, PCLKP=66700000
[    0.000000] sclk_dmc: source is sclk_a2m (0), rate is 200000000
[    0.000000] sclk_onenand: source is hclk_psys (0), rate is 66700000
[    0.000000] sclk: source is mout_mpll (6), rate is 66700000
[    0.000000] sclk: source is mout_mpll (6), rate is 66700000
[    0.000000] sclk: source is mout_mpll (6), rate is 66700000
[    0.000000] sclk: source is mout_mpll (6), rate is 66700000
[    0.000000] sclk_mixer: source is sclk_dac (0), rate is 24000000
[    0.000000] sclk_spdif: source is sclk_audio (0), rate is 24000000
[    0.000000] sclk_fimc: source is ext_xtal (0), rate is 24000000
[    0.000000] sclk_fimc: source is ext_xtal (0), rate is 24000000
[    0.000000] sclk_fimc: source is ext_xtal (0), rate is 24000000
[    0.000000] sclk_cam0: source is xusbxti (1), rate is 12000000
[    0.000000] sclk_cam1: source is ext_xtal (0), rate is 12000000
[    0.000000] sclk_fimd: source is ext_xtal (0), rate is 24000000
[    0.000000] sclk_mmc: source is mout_mpll (6), rate is 47642857
[    0.000000] sclk_mmc: source is mout_epll (7), rate is 96000000
[    0.000000] sclk_mmc: source is mout_mpll (6), rate is 47642857
[    0.000000] sclk_mmc: source is mout_epll (7), rate is 96000000
[    0.000000] sclk_mfc: source is sclk_a2m (0), rate is 200000000
[    0.000000] sclk_g2d: source is sclk_a2m (0), rate is 200000000
[    0.000000] sclk: source is sclk_a2m (0), rate is 100000000
[    0.000000] sclk_csis: source is ext_xtal (0), rate is 24000000
[    0.000000] sclk_spi: source is ext_xtal (0), rate is 24000000
[    0.000000] sclk_spi: source is ext_xtal (0), rate is 24000000
[    0.000000] sclk_pwi: source is ext_xtal (0), rate is 24000000
[    0.000000] sclk_pwm: source is ext_xtal (0), rate is 24000000
[    0.000000] sclk_mdnie: source is ext_xtal (0), rate is 24000000
[    0.000000] sclk_mdnie_pwm: source is ext_xtal (0), rate is 24000000
[    0.000000] s5pv210: 37748736 bytes system memory reserved for mfc at 0x30c0a000
[    0.000000] s5pv210: 37748736 bytes system memory reserved for mfc at 0x40000000
[    0.000000] s5pv210: 25165824 bytes system memory reserved for fimc0 at 0x42400000
[    0.000000] s5pv210: 10137600 bytes system memory reserved for fimc1 at 0x43c00000
[    0.000000] s5pv210: 25165824 bytes system memory reserved for fimc2 at 0x445ab000
[    0.000000] s5pv210: 25165824 bytes system memory reserved for jpeg at 0x45dab000
[    0.000000] s5pv210: 4915200 bytes system memory reserved for fimd at 0x475ab000
[    0.000000] s5pv210: 10485760 bytes system memory reserved for texstream at 0x47a5b000
[    0.000000] s5pv210: 3379200 bytes system memory reserved for pmem_gpu1 at 0x4845b000
[    0.000000] s5pv210: 8388608 bytes system memory reserved for g2d at 0x48794000
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 130048
[    0.000000] Kernel command line: root=/dev/nfs nfsroot=192.168.199.179:/opt/v210_rootfs ip=192.168.199.188:192.168.199.179:192.168.1.253:255.255.255.0::eth0:off  init=/linuxrc console=ttySAC2,115200
[    0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)
[    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
[    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
[    0.000000] Memory: 256MB 256MB = 512MB total
[    0.000000] Memory: 327696k/327696k available, 196592k reserved, 0K highmem
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
[    0.000000]     DMA     : 0xff000000 - 0xffe00000   (  14 MB)
[    0.000000]     vmalloc : 0xe0800000 - 0xfc000000   ( 440 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB)
[    0.000000]     modules : 0xbf000000 - 0xc0000000   (  16 MB)
[    0.000000]       .init : 0xc0008000 - 0xc0033000   ( 172 kB)
[    0.000000]       .text : 0xc0033000 - 0xc06ef000   (6896 kB)
[    0.000000]       .data : 0xc06f0000 - 0xc073d600   ( 310 kB)
[    0.000000] SLUB: Genslabs=9, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000]  RCU-based detection of stalled CPUs is disabled.
[    0.000000]  Verbose stalled-CPUs detection is disabled.
[    0.000000] NR_IRQS:393
[    0.000000] VIC @fd000000: id 0x00041192, vendor 0x41
[    0.000000] VIC @fd010000: id 0x00041192, vendor 0x41
[    0.000000] VIC @fd020000: id 0x00041192, vendor 0x41
[    0.000000] VIC @fd030000: id 0x00041192, vendor 0x41
[    0.000000] mult[140737]
[    0.000000] max_delta_ns[2937815369]
[    0.000000] min_delta_ns[30517]
[    0.000000] rate[32768]
[    0.000000] HZ[256]
[    0.000000] Console: colour dummy device 80x30
[    0.000000] console [ttySAC2] enabled
[    0.521537] Calibrating delay loop... 998.15 BogoMIPS (lpj=1949696)
[    0.606593] pid_max: default: 32768 minimum: 301
[    0.611242] Mount-cache hash table entries: 512
[    0.615976] Initializing cgroup subsys debug
[    0.619951] Initializing cgroup subsys cpuacct
[    0.624365] Initializing cgroup subsys freezer
[    0.628807] CPU: Testing write buffer coherency: ok
[    0.635595] regulator: core version 0.5
[    0.638080] NET: Registered protocol family 16
[    0.647705] S3C Power Management, Copyright 2004 Simtec Electronics
[    0.652504] pmstats at 00000000
[    0.655630] Open OV2655 camema sensor
[    0.792977] smdkc110_setup_clocks: sclk_mmc: source is mout_mpll, rate is 47642857
[    0.799089] smdkc110_setup_clocks: sclk_mmc: source is mout_mpll, rate is 47642857
[    0.806623] smdkc110_setup_clocks: sclk_mmc: source is mout_mpll, rate is 47642857
[    0.814161] smdkc110_setup_clocks: sclk_mmc: source is mout_mpll, rate is 47642857
[    0.821707] smdkv210_nand_io_init
[    0.825366] S5PV210: Initializing architecture
[    0.829705] s3c24xx-pwm s3c24xx-pwm.0: tin at 66700000, tdiv at 66700000, tin=divclk, base 0
[    0.837838] s3c24xx-pwm s3c24xx-pwm.1: tin at 66700000, tdiv at 66700000, tin=divclk, base 8
[    0.846240] s3c24xx-pwm s3c24xx-pwm.2: tin at 66700000, tdiv at 66700000, tin=divclk, base 12
[    0.854731] s3c24xx-pwm s3c24xx-pwm.3: tin at 66700000, tdiv at 66700000, tin=divclk, base 16
[    0.863340] regulator: pd_audio_supply: 5000 mV normal
[    0.868502] regulator: pd_cam_supply: 5000 mV normal
[    0.873515] regulator: pd_tv_supply: 5000 mV normal
[    0.878448] regulator: pd_lcd_supply: 5000 mV normal
[    0.883475] regulator: pd_g3d_supply: 5000 mV normal
[    0.888499] regulator: pd_mfc_supply: 5000 mV normal
[    0.899380] bio: create slab <bio-0> at 0
[    0.902481] SCSI subsystem initialized
[    0.905768] usbcore: registered new interface driver usbfs
[    0.911166] usbcore: registered new interface driver hub
[    0.916486] usbcore: registered new device driver usb
[    0.921818] s3c-i2c s3c2440-i2c.0: i2c-0: S3C I2C adapter
[    0.927033] s3c-i2c s3c2440-i2c.1: i2c-1: S3C I2C adapter
[    0.932342] s3c-i2c s3c2440-i2c.2: i2c-2: S3C I2C adapter
[    0.937844] Advanced Linux Sound Architecture Driver Version 1.0.23.
[    0.944249] Sangoma WANPIPE Router v1.1 (c) 1995-2000 Sangoma Technologies Inc.
[    0.951376] cfg80211: Calling CRDA to update world regulatory domain
[    0.957665] Switching to clocksource clock_source_systimer
[    0.968041] NET: Registered protocol family 2
[    0.971114] IP route cache hash table entries: 4096 (order: 2, 16384 bytes)
[    0.978537] TCP established hash table entries: 16384 (order: 5, 131072 bytes)
[    0.985351] TCP bind hash table entries: 16384 (order: 6, 327680 bytes)
[    0.992086] TCP: Hash tables configured (established 16384 bind 16384)
[    0.998139] TCP reno registered
[    1.001249] UDP hash table entries: 256 (order: 1, 12288 bytes)
[    1.007171] UDP-Lite hash table entries: 256 (order: 1, 12288 bytes)
[    1.013612] NET: Registered protocol family 1
[    1.018040] RPC: Registered udp transport module.
[    1.022494] RPC: Registered tcp transport module.
[    1.027167] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    1.033731] PMU: registered new PMU device of type 0
[    1.038558] wifi power management
[    1.042046] SMDKC110/V210 RTC, (c) 2010 Samsung Electronics
[    1.047484] smdkc110-rtc smdkc110-rtc: rtc disabled, re-enabling
[    1.053433] smdkc110-rtc smdkc110-rtc: rtc disabled, re-enabling
[    1.059542] smdkc110-rtc smdkc110-rtc: rtc core: registered s3c as rtc0
[    1.066041] S5PV210 ADC driver, (c) 2010 Samsung Electronics
[    1.071827] cpuidle: phy_regs_save:0x4fd7c000
[    1.076265] input: s3c-button as /devices/virtual/input/input0
[    1.081776] s3c button Initialized!!
[    1.085440] Loaded driver for PL330 DMAC-0 s3c-pl330
[    1.090267]  DBUFF-64x8bytes Num_Chans-8 Num_Peri-2 Num_Events-32
[    1.096393] Loaded driver for PL330 DMAC-1 s3c-pl330
[    1.101263]  DBUFF-8x4bytes Num_Chans-8 Num_Peri-32 Num_Events-32
[    1.107407] Loaded driver for PL330 DMAC-2 s3c-pl330
[    1.112275]  DBUFF-8x4bytes Num_Chans-8 Num_Peri-32 Num_Events-32
[    1.125103] ashmem: initialized
[    1.127374] NTFS driver 2.1.29 [Flags: R/W].
[    1.131061] JFFS2 version 2.2. (NAND) (SUMMARY)  © 2001-2006 Red Hat, Inc.
[    1.138070] ROMFS MTD (C) 2007 Red Hat, Inc.
[    1.142260] msgmni has been set to 640
[    1.148482] alg: No test for stdrng (krng)
[    1.151162] io scheduler noop registered
[    1.155035] io scheduler deadline registered
[    1.159264] io scheduler cfq registered (default)
[    1.164578] s3cfb s3cfb: [fb2] dma: 0x475ab000, cpu: 0xe1000000, size: 0x004b0000
[    1.175381] FIMD src sclk = 166750000
[    1.177584] s3cfb s3cfb: registered successfully
[    1.182177] Start display and show logo
[    1.286720] x210 led driver
[    1.354759] PA FB = 0x475AB000, bits per pixel = 32
[    1.358195] screen width=1024 height=600 va=0xd75ab000 pa=0x475ab000
[    1.364505] xres_virtual = 1024, yres_virtual = 1200, xoffset = 0, yoffset = 0
[    1.371698] fb_size=4915200
[    1.374466] Back frameBuffer[0].VAddr=d7803000 PAddr=47803000 size=2457600
[    1.381647] s5pv210-uart.0: s3c2410_serial0 at MMIO 0xe2900000 (irq = 16) is a S3C6400/10
[    1.389774] s5pv210-uart.1: s3c2410_serial1 at MMIO 0xe2900400 (irq = 20) is a S3C6400/10
[    1.397839] s5pv210-uart.2: s3c2410_serial2 at MMIO 0xe2900800 (irq = 24) is a S3C6400/10
[    1.405959] s5pv210-uart.3: s3c2410_serial3 at MMIO 0xe2900c00 (irq = 28) is a S3C6400/10
[    1.418279] brd: module loaded
[    1.422082] loop: module loaded
[    1.423793] pmem_gpu1: 1 init
[    1.427122] Android kernel panic handler initialized (bind=kpanic)
[    1.433328] S3C NAND Driver, (c) 2008 Samsung Electronics
[    1.438338] Unknown NAND Device.
[    1.441504] PPP generic driver version 2.4.2
[    1.445877] PPP Deflate Compression module registered
[    1.450714] PPP BSD Compression module registered
[    1.456114] PPP MPPE Compression module registered
[    1.460160] NET: Registered protocol family 24
[    1.466103] dm9000 Ethernet Driver, V1.31
[    1.469916] eth0: dm9000c at e08f4300,e08f8304 IRQ 42 MAC: 00:09:c0:ff:ec:48 (platform data)
[    1.477125] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    1.483684] s5p-ehci s5p-ehci: s5pv210 EHCI
[    1.487729] s5p-ehci s5p-ehci: new USB bus registered, assigned bus number 1
[    1.494815] s5p-ehci s5p-ehci: irq 87, io mem 0xec200000
[    1.509910] s5p-ehci s5p-ehci: USB 0.0 started, EHCI 1.00
[    1.513903] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[    1.520600] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    1.527789] usb usb1: Product: s5pv210 EHCI
[    1.531942] usb usb1: Manufacturer: Linux 2.6.35.7+ ehci_hcd
[    1.537583] usb usb1: SerialNumber: s5pv210
[    1.542166] hub 1-0:1.0: USB hub found
[    1.545490] hub 1-0:1.0: 1 port detected
[    1.549548] Initializing USB Mass Storage driver...
[    1.554313] usbcore: registered new interface driver usb-storage
[    1.560198] USB Mass Storage support registered.
[    1.565043] mice: PS/2 mouse device common for all mice
[    1.570313] S5P Touchscreen driver, (c) 2008 Samsung Electronics
[    1.576066] s3c-ts s3c-ts: Created Median filter len:5 coords:2 dec_threshold:6
[    1.583258] s3c-ts s3c-ts: Created Mean filter len:3 coords:2
[    1.589004] s3c-ts s3c-ts: Created Linear filter coords:2
[    1.594349] s3c-ts s3c-ts: Created zoom filter coords:2
[    1.599545] s3c-ts s3c-ts: 4 filter(s) initialized
[    1.604333] S5P TouchScreen got loaded successfully : 12 bits
[    1.610180] input: S5P TouchScreen as /devices/virtual/input/input1
[    1.616614] [GSLX680] Enter gslX680_ts_init
[    1.620656] input: gslX680 as /devices/platform/s3c2440-i2c.1/i2c-1/1-0040/input/input2
[    1.888805] usb 1-1: new high speed USB device using s5p-ehci and address 2
[    2.023160] usb 1-1: New USB device found, idVendor=05e3, idProduct=0608
[    2.028398] usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[    2.035501] usb 1-1: Product: USB2.0 Hub
[    2.040018] hub 1-1:1.0: USB hub found
[    2.043414] hub 1-1:1.0: 4 ports detected
[    4.257097] using rtc device, s3c, for alarms
[    4.260120] i2c /dev entries driver
[    4.263915] Linux video capture interface: v2.00
[    4.268120] gspca: main v2.9.0 registered
[    4.272166] s3c-csis: Samsung MIPI-CSI2 driver probed successfully
[    4.278242] mfc_init: <6>S5PC110 MFC Driver, (c) 2009 Samsung Electronics
[    4.278248]
[    4.286825] S3C JPEG Driver, (c) 2007 Samsung Electronics
[    4.291799] JPEG driver for S5PV210
[    4.295865] i2c i2c-1: attached s5p_ddc into i2c adapter successfully
[    4.301714] S5PC11X HPD Driver, (c) 2009 Samsung Electronics
[    4.307502] S5PC11X CEC Driver, (c) 2009 Samsung Electronics
[    4.313431] usbcore: registered new interface driver uvcvideo
[    4.318662] USB Video Class driver (v0.1.0)
[    4.324438] device-mapper: uevent: version 1.0.3
[    4.330241] device-mapper: ioctl: 4.17.0-ioctl (2010-03-05) initialised: [e-mail]
[    4.337280] cpuidle: using governor ladder
[    4.341357] cpuidle: using governor menu
[    4.345226] sdhci: Secure Digital Host Controller Interface driver
[    4.351337] sdhci: Copyright(c) Pierre Ossman
[    4.355780] s3c-sdhci s3c-sdhci.0: clock source 0: hsmmc (133400000 Hz)
[    4.362399] s3c-sdhci s3c-sdhci.0: clock source 1: hsmmc (133400000 Hz)
[    4.368845] s3c-sdhci s3c-sdhci.0: clock source 2: sclk_mmc (47642857 Hz)
[    4.375766] mmc0: SDHCI controller on samsung-hsmmc [s3c-sdhci.0] using ADMA
[    4.382679] s3c-sdhci s3c-sdhci.1: clock source 0: hsmmc (133400000 Hz)
[    4.389215] s3c-sdhci s3c-sdhci.1: clock source 1: hsmmc (133400000 Hz)
[    4.395795] s3c-sdhci s3c-sdhci.1: clock source 2: sclk_mmc (47642857 Hz)
[    4.473033] wifi power enabled
[    4.474703] mmc1: SDHCI controller on samsung-hsmmc [s3c-sdhci.1] using ADMA
[    4.481690] s3c-sdhci s3c-sdhci.2: clock source 0: hsmmc (133400000 Hz)
[    4.488239] s3c-sdhci s3c-sdhci.2: clock source 1: hsmmc (133400000 Hz)
[    4.494823] s3c-sdhci s3c-sdhci.2: clock source 2: sclk_mmc (47642857 Hz)
[    4.501682] mmc2: SDHCI controller on samsung-hsmmc [s3c-sdhci.2] using ADMA
[    4.508638] s3c-sdhci s3c-sdhci.3: clock source 0: hsmmc (133400000 Hz)
[    4.515186] s3c-sdhci s3c-sdhci.3: clock source 1: hsmmc (133400000 Hz)
[    4.521772] s3c-sdhci s3c-sdhci.3: clock source 2: sclk_mmc (47642857 Hz)
[    4.528646] mmc3: SDHCI controller on samsung-hsmmc [s3c-sdhci.3] using ADMA
[    4.536172] usbcore: registered new interface driver hiddev
[    4.541177] usbcore: registered new interface driver usbhid
[    4.546629] usbhid: USB HID core driver
[    4.551923] logger: created 64K log 'log_main'
[    4.555020] logger: created 256K log 'log_events'
[    4.559835] logger: created 64K log 'log_radio'
[    4.564192] logger: created 64K log 'log_system'
[    4.569890] No device for DAI WM8976 HiFi
[    4.572700] s3c64xx_iis_dai_init:s3c64xx-i2s0
[    4.577213] s3c64xx_iis_dev_probe:id0 !!!
[    4.581087] s3c64xx_iis_dai_init:s3c64xx-i2s1
[    4.585752] WM8976 Audio Codec 0.4wm8976_probe: i2c_master_send
[    4.591501] wm8976_init
[    4.633569] mmc0: new high speed MMC card at address 0001
[    4.637714] mmcblk0: mmc0:0001 4FPD3R 3.64 GiB
[    4.642224]  mmcblk0: p1 p2 p3 p4
[    5.367166] s3c_idma_preallocate_buffer:  VA-e0940000  PA-C0000000  163840bytes
[    5.373283] s3c_preallocate_dma_buffer: VA-ff007000, PA-4FF40000, 131072bytes
[    5.380105] asoc: WM8976 HiFi <-> s3c64xx-i2s0 mapping ok
[    5.388847] ALSA device list:
[    5.390334]   #0: smdkc1000 (WM8976)
[    5.393934] GACT probability NOT on
[    5.397375] Mirror/redirect action on
[    5.401012] u32 classifier
[    5.403682]     Actions configured
[    5.407074] Netfilter messages via NETLINK v0.30.
[    5.411811] nf_conntrack version 0.5.0 (5120 buckets, 20480 max)
[    5.417890] CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Please use
[    5.425109] nf_conntrack.acct=1 kernel parameter, acct=1 nf_conntrack module option or
[    5.432987] sysctl net.netfilter.nf_conntrack_acct=1 to enable it.
[    5.439914] ctnetlink v0.93: registering with nfnetlink.
[    5.444536] xt_time: kernel timezone is -0000
[    5.450850] ip_tables: (C) 2000-2006 Netfilter Core Team
[    5.454788] arp_tables: (C) 2002 David S. Miller
[    5.459356] TCP cubic registered
[    5.462504] NET: Registered protocol family 10
[    5.468696] lo: Disabled Privacy Extensions
[    5.476059] Mobile IPv6
[    5.477026] IPv6 over IPv4 tunneling driver
[    5.482726] sit0: Disabled Privacy Extensions
[    5.488407] ip6tnl0: Disabled Privacy Extensions
[    5.492895] NET: Registered protocol family 17
[    5.496001] NET: Registered protocol family 15
[    5.500436] lib80211: common routines for IEEE802.11 drivers
[    5.506107] ThumbEE CPU extension supported.
[    5.510385] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 2
[    5.518470] regulator_init_complete: disabling pd_mfc_supply
[    5.523548] regulator_init_complete: disabling pd_tv_supply
[    5.529089] regulator_init_complete: disabling pd_cam_supply
[    5.534876] smdkc110-rtc smdkc110-rtc: rtc disabled, re-enabling
[    5.540708] smdkc110-rtc smdkc110-rtc: setting system clock to 2010-01-01 12:00:04 UTC (1262347204)
[    5.551167] FIMC0 registered successfully
[    5.554986] FIMC1 registered successfully
[    5.558972] FIMC2 registered successfully
[    5.561736] <6>S5PC1XX TVOUT Driver, (c) 2009 Samsung Electronics
[    5.568411] s5p-tvout s5p-tvout: hpd status is cable removed
[    6.119416] eth0: link down
[    6.120886] ADDRCONF(NETDEV_UP): eth0: link is not ready
[    7.127202] IP-Config: Gateway not on directly connected network.
[    7.131946] DBUG_PORT must not use AFC!
[    7.135686] Looking up port of RPC 100003/2 on 192.168.199.179
[    7.744271] eth0: link up, 100Mbps, full-duplex, lpa 0x4DE1
[    7.748485] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[    8.235580] Looking up port of RPC 100005/1 on 192.168.199.179
[    8.283078] VFS: Unable to mount root fs via NFS, trying floppy.
[    8.287885] VFS: Cannot open root device "nfs" or unknown-block(2,0)
[    8.293947] Please append a correct "root=" boot option; here are the available partitions:
[    8.302286] b300         3817472 mmcblk0 driver: mmcblk
[    8.307462]   b301          264759 mmcblk0p1
[    8.311689]   b302          264759 mmcblk0p2
[    8.315936]   b303          104412 mmcblk0p3
[    8.320182]   b304         3158463 mmcblk0p4
[    8.324429] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[    8.332678] Backtrace:
[    8.336337] [<c0037fb8>] (dump_backtrace+0x0/0x110) from [<c0509828>] (dump_stack+0x18/0x1c)
[    8.343516]  r6:00008000 r5:dfecc000 r4:c0701b6c r3:00000002
[    8.349129] [<c0509810>] (dump_stack+0x0/0x1c) from [<c05098a4>] (panic+0x78/0xf8)
[    8.356692] [<c050982c>] (panic+0x0/0xf8) from [<c0008fa8>] (mount_block_root+0x1d8/0x218)
[    8.364913]  r3:00000002 r2:00000001 r1:dfc37f60 r0:c064f8aa
[    8.370532] [<c0008dd0>] (mount_block_root+0x0/0x218) from [<c00090ac>] (mount_root+0xc4/0xf8)
[    8.379133] [<c0008fe8>] (mount_root+0x0/0xf8) from [<c0009244>] (prepare_namespace+0x164/0x1bc)
[    8.387876]  r5:c002b331 r4:c073d900
[    8.391416] [<c00090e0>] (prepare_namespace+0x0/0x1bc) from [<c00084fc>] (kernel_init+0x128/0x170)
[    8.400358]  r5:c00083d4 r4:c073d6c0
[    8.403900] [<c00083d4>] (kernel_init+0x0/0x170) from [<c005b894>] (do_exit+0x0/0x5f0)
[    8.411794]  r4:00000000 r3:00000000
[    8.415333] Rebooting in 5 seconds..
[    8.578316] eth0: IPv6 duplicate address fe80::209:c0ff:feff:ec48 detected!
[   13.460208]
[   13.460227] Restarting Linux version 2.6.35.7+ (lanfeiye@fly-vm) (gcc version 4.4.1 (Sourcery G++ Lite 2009q3-67) ) #1 PREEMPT Wed Jan 12 22:12:04 CST 2022
[   13.460238]
[   13.477165] arch_reset: attempting watchdog reOK

Answer 1

异常LOG

[    7.127202] IP-Config: Gateway not on directly connected network.
[    7.131946] DBUG_PORT must not use AFC!
[    7.135686] Looking up port of RPC 100003/2 on 192.168.199.179
[    7.744271] eth0: link up, 100Mbps, full-duplex, lpa 0x4DE1
[    7.748485] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[    8.235580] Looking up port of RPC 100005/1 on 192.168.199.179
[    8.283078] VFS: Unable to mount root fs via NFS, trying floppy.
[    8.287885] VFS: Cannot open root device "nfs" or unknown-block(2,0)
[    8.293947] Please append a correct "root=" boot option; here are the available partitions:
[    8.302286] b300         3817472 mmcblk0 driver: mmcblk
[    8.307462]   b301          264759 mmcblk0p1
[    8.311689]   b302          264759 mmcblk0p2
[    8.315936]   b303          104412 mmcblk0p3
[    8.320182]   b304         3158463 mmcblk0p4
[    8.324429] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[    8.332678] Backtrace:
[    8.336337] [<c0037fb8>] (dump_backtrace+0x0/0x110) from [<c0509828>] (dump_stack+0x18/0x1c)
[    8.343516]  r6:00008000 r5:dfecc000 r4:c0701b6c r3:00000002
[    8.349129] [<c0509810>] (dump_stack+0x0/0x1c) from [<c05098a4>] (panic+0x78/0xf8)
[    8.356692] [<c050982c>] (panic+0x0/0xf8) from [<c0008fa8>] (mount_block_root+0x1d8/0x218)
[    8.364913]  r3:00000002 r2:00000001 r1:dfc37f60 r0:c064f8aa
[    8.370532] [<c0008dd0>] (mount_block_root+0x0/0x218) from [<c00090ac>] (mount_root+0xc4/0xf8)
[    8.379133] [<c0008fe8>] (mount_root+0x0/0xf8) from [<c0009244>] (prepare_namespace+0x164/0x1bc)
[    8.387876]  r5:c002b331 r4:c073d900
[    8.391416] [<c00090e0>] (prepare_namespace+0x0/0x1bc) from [<c00084fc>] (kernel_init+0x128/0x170)
[    8.400358]  r5:c00083d4 r4:c073d6c0
[    8.403900] [<c00083d4>] (kernel_init+0x0/0x170) from [<c005b894>] (do_exit+0x0/0x5f0)
[    8.411794]  r4:00000000 r3:00000000
[    8.415333] Rebooting in 5 seconds..
[    8.578316] eth0: IPv6 duplicate address fe80::209:c0ff:feff:ec48 detected!
[   13.460208]
[   13.460227] Restarting Linux version 2.6.35.7+ (lanfeiye@fly-vm) (gcc version 4.4.1 (Sourcery G++ Lite 2009q3-67) ) #1 PREEMPT Wed Jan 12 22:12:04 CST 2022
[   13.460238]
[   13.477165] arch_reset: attempting watchdog reOK

解决办法

打开文件：

[XXX@fly-vm ~]$ sudo vim /etc/default/nfs-kernel-server

加入：

RPCNFSDOPTS="--nfs-version 2,3,4 --debug --syslog"

然后重启nfs：

[XXX@fly-vm ~]$ sudo /etc/init.d/nfs-kernel-server restart
[ ok ] Restarting nfs-kernel-server (via systemctl): nfs-kernel-server.service.