On 18 October 2002 20:25, Carl-Daniel Hailfinger wrote:
> Richard B. Johnson wrote:
> > In other words, if I have quark:/tmp mounted on /tmp, I can
> > umount / without unmounting quark:/tmp.

You can remount ro. I doubt you can umount.

> >
> > [SNIPPED]
>
> Does not work here.
>
> # mount /dev/fd0 /floppy/
> # mount /dev/hda1 /floppy/test/
> # umount /floppy/
> umount: /media/floppy: device is busy
> # touch /floppy/foo
> umount -f /floppy/
> umount2: Device or resource busy
> umount: /dev/fd0: not mounted
> umount: /media/floppy: Illegal seek
> # touch /floppy/foo2
> # mount
> /dev/fd0 on /floppy type vfat (rw,sync)
> /dev/hda1 on /floppy/test type vfat (rw)
>
> In other words, your suggested method does not work here. (Kernel
> 2.4.18, util-linux-2.11n)
>
> # mount -o remount,ro /floppy/
> /dev/fd0 on /floppy type vfat (ro,sync)
> /dev/hda1 on /floppy/test type vfat (rw)
>
> This, however, seems to work.

umount / is special: in fact it does remount ro.
So you two do the same thing.
--
vda
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/