Re: [PATCH 20/21] AUTOFS: Make sure all dentries refs are released before calling kill_anon_super()

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On Fri, 07 Jul 2006 11:15:55 +0800
Ian Kent <raven@xxxxxxxxxx> wrote:

> On Thu, 2006-07-06 at 18:56 -0700, Andrew Morton wrote:
> > On Thu, 06 Jul 2006 11:11:07 -0400
> > Trond Myklebust <Trond.Myklebust@xxxxxxxxxx> wrote:
> > 
> > > From: David Howells <dhowells@xxxxxxxxxx>
> > > 
> > > Make sure all dentries refs are released before calling kill_anon_super() so
> > > that the assumption that generic_shutdown_super() can completely destroy the
> > > dentry tree for there will be no external references holds true.
> > > 
> > > What was being done in the put_super() superblock op, is now done in the
> > > kill_sb() filesystem op instead, prior to calling kill_anon_super().
> > > 
> > > This makes the struct autofs_sb_info::root member variable redundant (since
> > > sb->s_root is still available), and so that is removed.  The calls to
> > > shrink_dcache_sb() are also removed since they're also redundant as
> > > shrink_dcache_for_umount() will now be called after the cleanup routine.
> > > 
> > 
> > AFAIK, Ian is still off thinking about this one?
> 
> The patch looks fine to me but I wanted to give it a basic sanity test
> before ACKing it. I haven't got to that yet partly because I wasn't sure
> if the two patches from David would stand alone. Will they or will I
> need to apply Davids whole patch set?

I expect this patch is standalone, but it's not really useful or
interesting to test it unless [21/21] is also applied, because the two
patches will tend to stick together.  Plus this one is supposed to fix a
umount/shutdown-time BUG in the other.

> Anyway, I'll have a go at it this afternoon.

Thanks.
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