[CRIU] implementing some kind of --leave-frozen option for c/r in CRIU

[Tycho Andersen]

On Mon, May 16, 2016 at 08:47:26PM +0300, Batalov Eugene wrote:
> Conceptually we're able to get the same state in criu gc as criu restore
> gets.
> 
> I am agree about namespaces and network unlock. Our folk has missed this.
> 
> About link remaps and namespaces. This thing from patch looks like it
> should working:
> 
> > + if (rfe->remap_type == REMAP_TYPE__LINKED) {
> >  + if (open_remap_linked(rfi, rfe))
> >  + {
> >  + pr_err("open_remap_linked failed");
> >  + return -1;
> >  + }
> >  +
> >  + int mntns_root = mntns_get_root_by_mnt_id(rfi->remap->rmnt_id);

Perhaps I'm missing something, but why is this mntns the same one as
the task whose mount ns we're trying to clean?

I can see that it might work because you pivot_root() into the same
--root as the dump/restore is in, but if the container's root isn't
mounted on the host won't that fail?

Tycho