Re: [RFC][PATCH] rbind across namespaces

[Ram <linuxram@us.ibm.com>]

On Sun, 2005-05-22 at 01:08, Miklos Szeredi wrote:
> > > I still see a problem: what if old_nd.mnt is already detached, and
> > > bind is non-recursive.  Now it fails with EINVAL, though it used to
> > > work (and I think is very useful).
> > 
> > Hey, you just made another argument for not detaching mounts when the
> > last task with that current->namespace exits, but instead detaching
> > mounts when the last reference to any vfsmnt in the namespace is dropped.
> > 
> > Hint :)
> 
> I have a better idea:
> 
>  - create a "dead_mounts" namespace.
>  - chain each detached mount's ->mnt_list on dead_mounts->list
>  - set mnt_namespace to dead_mounts
>  - export the list via proc through the usual mount list interface
> 
> The last would be a nice bonus: I've always wanted to see the list of
> detached, but not-yet destroyed mounts.
> 
> Does anybody see a problem with that?


Yes. :) because I will have to change my 'rbind across namespace' patch
because now detached mounts will have dead_mounts namespace instead of
null namespace.

RP


> 
> Miklos