[Unionfs] Can't mount NFS-exported union anymore in unionfs-1.4

[Shaya Potter]

On Wed, 2006-11-29 at 15:51 +0100, Wilhelm Meier wrote:
> Am Mittwoch, 29. November 2006 15:32 schrieb hooanon05 at yahoo.co.jp:
> > Wilhelm Meier:
> > > Sorry, but the symptom is the same. Attached the tcpdump (wireshark).
> 
> It is strange, that the nfs-server returns an error on lookup-op. Seems like 
> lookup on the underlaying union is broken.

I think this is a known problem because unionfs outside of kernel (not
kernel unionfs where I think it might have been fixed) has a problem w/
passing intents, which will cause an oops in nfs when used as a branch
under a unionfs.