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liefyuan

会员

注册时间： 2021-05-30

已发帖子： 69

积分： 95

使用buildroot构建文件系统，上电打印时dhcpcd启动完毕需要3分钟，请问是怎么解决啊？

...
Starting syslogd: OK
Starting klogd: OK
Running sysctl: OK
Starting mdev... OK
[    1.680036] usb 1-1: new high-speed USB device number 2 using ehci-platform
[    1.911867] hub 1-1:1.0: USB hub found
[    1.920588] hub 1-1:1.0: 4 ports detected
[    2.359925] usb 1-1.1: new high-speed USB device number 3 using ehci-platform
[    2.620956] random: fast init done
Saving random seed: [    3.057420] random: dd: uninitialized urandom read (512 bytes read)
OK
Starting system message bus: [    3.118221] random: dbus-uuidgen: uninitialized urandom read (12 bytes read)
[    3.125652] random: dbus-uuidgen: uninitialized urandom read (8 bytes read)
done
Starting network: OK
Starting dhcpcd...
no valid interfaces found
no interfaces have a carrier
forked to background, child pid 156

就一直卡在这里有三分多钟！才到下面的打印。

Starting dropbear sshd: OK
[  185.369872] random: crng init done
[  185.373296] random: 3 urandom warning(s) missed due to ratelimiting
ssh-keygen: generating new host keys: RSA DSA ECDSA ED25519
Starting sshd: Privilege separation user sshd does not exist
OK

Welcome to Buildroot-V3s v1.1
...

如上：

终于进入系统后，使用ps命令看看这个pid:156是何方神圣！！

# ps
PID   USER     COMMAND
    1 root     init
    2 root     [kthreadd]
    3 root     [rcu_gp]
    4 root     [rcu_par_gp]
    7 root     [kworker/u2:0-ev]
    8 root     [mm_percpu_wq]
    9 root     [ksoftirqd/0]
   10 root     [rcu_sched]
   11 root     [migration/0]
   12 root     [cpuhp/0]
   13 root     [kdevtmpfs]
   14 root     [netns]
   15 root     [oom_reaper]
   16 root     [writeback]
   17 root     [kcompactd0]
   19 root     [kworker/u2:1]
   67 root     [kblockd]
   68 root     [watchdogd]
   69 root     [kworker/0:1-eve]
   70 root     [cfg80211]
   71 root     [kswapd0]
   74 root     [irq/23-sunxi-mm]
   75 root     [irq/24-sunxi-mm]
   76 root     [kworker/0:2-mm_]
   78 root     [kstrp]
   79 root     [kworker/0:4-eve]
   81 root     [mmc_complete]
   83 root     [kworker/0:1H-kb]
   88 root     [jbd2/mmcblk0p2-]
   89 root     [ext4-rsv-conver]
   90 root     [kworker/0:2H]
  105 root     /sbin/syslogd -n
  109 root     /sbin/klogd -n
  121 root     /sbin/mdev -df
  143 dbus     dbus-daemon --system
  156 root     /sbin/dhcpcd -f /etc/dhcpcd.conf
  164 root     /usr/sbin/dropbear -R
  171 root     -sh
  174 root     [kworker/0:0-eve]
  175 root     ps

就是这个：dhcpcd的进程！！

而且发现是在/etc/init.d/S41dhcpcd 文件中：

#!/bin/sh
#
# Start/stop dhcpcd
#

DAEMON=/sbin/dhcpcd
CONFIG=/etc/dhcpcd.conf
PIDFILE=/var/run/dhcpcd.pid

[ -f $CONFIG ] || exit 0

case "$1" in
  start)
        echo "Starting dhcpcd..."
        start-stop-daemon -S -x "$DAEMON" -p "$PIDFILE" -- -f "$CONFIG"
        ;;
  stop)
        echo "Stopping dhcpcd..."
        start-stop-daemon -K -x "$DAEMON" -p "$PIDFILE" -o
        ;;
  reload|force-reload)
        echo "Reloading dhcpcd configuration..."
        "$DAEMON" -s reload
        ;;
  restart)
        "$0" stop
        sleep 1 # Prevent race condition: ensure dhcpcd stops before start.
        "$0" start
        ;;
  *)
        echo "Usage: $0 {start|stop|restart|reload|force-reload}"
        exit 1
esac

liefyuan

会员

注册时间： 2021-05-30

已发帖子： 69

积分： 95

Re: 使用buildroot构建文件系统，上电打印时dhcpcd启动完毕需要3分钟，请问是怎么解决啊？

https://whycan.com/t_8713.html

应该和你这个是同样的问题

谢谢大佬，就是这个问题，已经解决了！