Re: Strange umount problem in latest 2.4.0 kernels

From: David Ford (david@linux.com)
Date: Thu Jan 11 2001 - 18:04:56 EST


"Udo A. Steinberg" wrote:

> "Udo A. Steinberg" wrote:
> >
> > The very strange stuff is umount at reboot:
> >
> > umount: none busy - remounted read-only
> > umount: /: device is busy
> > Remounting root-filesystem read-only
> > mount: / is busy
> > Rebooting.

Are you using devfs and do kernel threads have /dev/initctl open?

# lsof /dev
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
init 1 root 10u FIFO 0,5 574 /dev/initctl
keventd 2 root 10u FIFO 0,5 574 /dev/initctl
kapm-idle 3 root 10u FIFO 0,5 574 /dev/initctl
kswapd 4 root 10u FIFO 0,5 574 /dev/initctl
kreclaimd 5 root 10u FIFO 0,5 574 /dev/initctl
bdflush 6 root 10u FIFO 0,5 574 /dev/initctl
kupdate 7 root 10u FIFO 0,5 574 /dev/initctl
i2oevtd 8 root 10u FIFO 0,5 574 /dev/initctl
i2oblock 9 root 10u FIFO 0,5 574 /dev/initctl
khubd 12 root 10u FIFO 0,5 574 /dev/initctl
khttpd 16 root 10u FIFO 0,5 574 /dev/initctl

-d



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