[lxc-users] shared mount and umount propogation.

[Serge Hallyn]

Quoting Vijay Viswanathan (vijay.vishy at gmail.com):
> isnt --make-rbind and -rbind the same ?
> 
> anyways, I think understood the rslave concept.
> You want me make a slave mount (e.g., /mnt ) of some original share mount (
> e.g., /media ) and expose only /mnt in the lxc conf right ?
> 
> But the problem is the cleanup after pivot_root goes through all the
> folders in the host proc/mount list.
> If /media is shared and /mnt is rslave, exposing only /mnt  in the
> container still doesnt help because, the pivot_root's clean unmounts /media
> and there by /mnt is affected.

That should now be fixed in git, as all of / gets mounted MS_SLAVE
if / is found to be shared.  Now if only /media is shared and not
/, I suppose that's a different case.

A new helper function during container startup which finds any shared
mounts and remounts them first slave, then shared, would be ok with me.

-serge