On Mon, 2007-12-10 at 19:57 +0100, Andi Kleen wrote:
> > Hi Andi,
> > 
> > Does the attached patch fix the Oops?
> 
> Nope, got that a few hours after boot again:
> 
> -Andi

Hi Andi,

I appear to have misread d_find_alias(). It would seem that the only way
to ensure that a mountpoint won't be found is to remove it altogether
from the inode->i_dentry list. AFAICS that should be largely harmless
since the nfs sb->s_root is never visible to users, and is never part of
a dentry tree.

Cheers
  Trond