Quoting Srivatsa Vaddagiri ([EMAIL PROTECTED]):
> On Mon, Feb 12, 2007 at 12:15:28AM -0800, [EMAIL PROTECTED] wrote:
> > +int ns_container_clone(struct task_struct *tsk)
> > +{
> > + return container_clone(tsk, &ns_subsys);
> > +}
>
> This function is a no-op if ns hierarchy is not mounted at this point.
> This would mean that we will miss out on some directories in ns
> hierarchy if it happened to be mounted later. It would be nice to
> recreate such missing directories upon mount. However I suspect it would
> not be easy ..Maybe we need to scan the task list and (re-)invoke
> ns_container_clone() for every new tsk->nsproxy we find in the list.
> Alternately perhaps we could auto mount (kern_mount) ns hierarchy very early
> at
> bootup? On the flip side that would require remount support so that additional
> controllers (like cpuset, mem) can be bound to (non-empty) ns hierarchy after
> bootup.
Losing the directory isn't a big deal though. And both unsharing a
namespace (which causes a ns_container_clone) and mounting the hierarchy
are done by userspace, so if for some installation it is a big deal,
the init scripts on initrd can mount the hierarchy before doing any
unsharing.
Can you think of a reason why losing a few directories matters?
-serge
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