Re: [PATCH RESEND] userns: enable tmpfs support for user namespace

[Serge Hallyn <serge.hallyn-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>]

Quoting Gao feng (gaofeng-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org):
> On 2013/01/16 22:35, Serge Hallyn wrote:
> > Quoting Gao feng (gaofeng-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org):
> >> From: gaofeng <gaofeng-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
> >>
> >> Since the memory used by tmpfs is under control of
> >> memory cgroup. and the files under the tmpfs will not
> >> be leak to other tmpfs.
> >>
> >> So mounting tmpfs in user namespace does no harm to the
> >> host,we can allow tmpfs to be mounted in user namespace.
> >>
> >> Signed-off-by: gaofeng <gaofeng-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
> > 
> > I've got the same patch in my kernel at
> > http://kernel.ubuntu.com/git?p=serge/quantal-userns.git;a=summary
> > 
> > except note that there are two definitions of shmem_fs_type.
> > 
> 
> Yes, I miss the other one,Do you have plan to push this patch
> into linus's linux-2.6 or eric's userns tree?

I actually was waiting for Eric to do it, but I'll happily send it
to linux-fsdevel and lkml (in a bit).

> I'm trying to add userns support for libvirt,so I need tmpfs to
> be allowed to mount in userns.

-serge