sd卡启动的问题

macktao88

换回16g sd卡后烧录系统，打印如下：

[    2.778201] oprofile: hardware counters not available
[    2.783489] oprofile: using timer interrupt.
[    2.787961] Netfilter messages via NETLINK v0.30.
[    2.792991] nf_conntrack version 0.5.0 (8005 buckets, 32020 max)
[    2.799734] ctnetlink v0.93: registering with nfnetlink.
[    2.806284] xt_time: kernel timezone is -0000
[    2.811082] ip_tables: (C) 2000-2006 Netfilter Core Team
[    2.816872] ipt_CLUSTERIP: ClusterIP Version 0.8 loaded successfully
[    2.823590] arp_tables: (C) 2002 David S. Miller
[    2.828495] TCP cubic registered
[    2.831882] NET: Registered protocol family 17
[    2.836525] can: controller area network core (rev 20090105 abi 8)
[    2.843098] NET: Registered protocol family 29
[    2.847759] can: raw protocol (rev 20090105)
[    2.852233] can: broadcast manager protocol (rev 20090105 t)
[    2.858178] Registering the dns_resolver key type
[    2.863163] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
[    2.871166] ThumbEE CPU extension supported.
[    2.875697] mux: Failed to setup hwmod io irq -22
[    2.881296] Power Management for AM33XX family
[    2.886183] Trying to load am335x-pm-firmware.bin (60 secs timeout)
[    2.892868] Copied the M3 firmware to UMEM
[    2.897220] Cortex M3 Firmware Version = 0x181
[    2.910281] clock: disabling unused clocks to save power
[    2.918239] Detected MACID=f8:36:9b:89:c2:c4
[    2.923987] cpsw: Detected MACID = f8:36:9b:89:c2:c6
[    2.931422] input: gpio-keys as /devices/platform/gpio-keys/input/input1
[    2.941348] rtc-rx8010 2-0032: setting system clock to 2020-04-14 15:33:19 UTC (1586878399)
[    2.955006] EXT3-fs (mmcblk0p2): recovery required on readonly filesystem
[    2.962133] EXT3-fs (mmcblk0p2): write access will be enabled during recovery
[    2.971715] kjournald starting.  Commit interval 5 seconds
[    2.977498] EXT3-fs (mmcblk0p2): recovery complete
[    3.092425] EXT3-fs (mmcblk0p2): mounted filesystem with ordered data mode
[    3.099661] VFS: Mounted root (ext3 filesystem) readonly on device 179:2.
[    3.107854] devtmpfs: error mounting -2
[    3.112263] Freeing init memory: 256K
[    4.309931] EXT3-fs (mmcblk0p2): using internal journal

一直卡在这个位置。

zhichao

重启一下试试，看这个打印信息看不出错误

macktao88

我发现rootfs这个分区不用root权限是无法在里面创建文件的，这个正常吗

macktao88

[    2.628923] OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec
[    2.636675] cpuidle: using governor ladder
[    2.641435] cpuidle: using governor menu
[    2.652386] usbcore: registered new inte**ce driver usbhid
[    2.658214] usbhid: USB HID core driver
[    2.663209] tiadc tiadc: attached adc driver
[    2.670459] _regulator_get: 2-001b supply IOVDD not found, using dummy regulator
[    2.678300] _regulator_get: 2-001b supply DVDD not found, using dummy regulator
[    2.685984] _regulator_get: 2-001b supply AVDD not found, using dummy regulator
[    2.693656] _regulator_get: 2-001b supply DRVDD not found, using dummy regulator
[    2.704329] asoc: tlv320aic3x-hifi <-> davinci-mcasp.1 mapping ok
[    2.742484] mmc0: host does not support reading read-only switch. assuming write-enable.
[    2.752748] mmc0: new high speed SDHC card at address 0007
[    2.759215] mmcblk0: mmc0:0007 Y016B 14.9 GiB
[    2.765508]  mmcblk0: p1 p2
[    2.771981] ALSA device list:
[    2.775096]   #0: AM335X EVM
[    2.778095] oprofile: hardware counters not available
[    2.783383] oprofile: using timer interrupt.
[    2.787857] Netfilter messages via NETLINK v0.30.
[    2.792884] nf_conntrack version 0.5.0 (8005 buckets, 32020 max)
[    2.799626] ctnetlink v0.93: registering with nfnetlink.
[    2.806174] xt_time: kernel timezone is -0000
[    2.810976] ip_tables: (C) 2000-2006 Netfilter Core Team
[    2.816773] ipt_CLUSTERIP: ClusterIP Version 0.8 loaded successfully
[    2.823488] arp_tables: (C) 2002 David S. Miller
[    2.828391] TCP cubic registered
[    2.831778] NET: Registered protocol family 17
[    2.836419] can: controller area network core (rev 20090105 abi 8)
[    2.842984] NET: Registered protocol family 29
[    2.847646] can: raw protocol (rev 20090105)
[    2.852120] can: broadcast manager protocol (rev 20090105 t)

zhichao

正常，根目录就是root权限的