linux-kernel - Re: BUG fs/dcache.c:595 in 2.4.24rc3-git3 during NFS umount

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Date:	Tue, 11 Dec 2007 21:54:44 -0500
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	Andi Kleen <ak@...e.de>
Cc:	linux-kernel@...r.kernel.org, akpm@...l.org, torvalds@...l.org
Subject: Re: BUG fs/dcache.c:595 in 2.4.24rc3-git3 during NFS umount

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

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