umount --force fails

umount --force fails

[Anders Widman]

   Why can't I use "umount /mnt/disk --force"?

     [root]# umount /mnt/disk --force
     umount2: Device or resource busy
     umount: /dev/Server/Root: not mounted
     umount: /mnt/disk: Illegal seek

   No kernel errors are logged.

   The reason why I want to use "--force" is that I have Samba running
   sharing this folder (plus many others). I do not want to stop Samba
   just to unmount just one of the filesystems.

   Is there a way that I can get around this? I thought that "--force"
   would  force  an umount of the filesystem even if some program were
   using it?

   //Anders

Re: umount --force fails

[Oleg Drokin]

Hello!

On Wed, Apr 09, 2003 at 10:38:47PM +0200, Anders Widman wrote:

>    Why can't I use "umount /mnt/disk --force"?

It is only implemented for NFS. At least that's what my man page says.

>    Is there a way that I can get around this? I thought that "--force"
>    would  force  an umount of the filesystem even if some program were
>    using it?

I think it is possible to do that for any fs, but some decisions should be made like
what to do with processes having open filehandles/cwd to the mounted filesystem and so on.
Please consult lkml archives for more info on that topic.

Bye,
    Oleg