linux-kernel - Re: [PATCH 3/6] unlink: monitor i

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Message-Id: <1155143839.19249.151.camel@localhost.localdomain>
Date:	Wed, 09 Aug 2006 10:17:19 -0700
From:	Dave Hansen <haveblue@...ibm.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	akpm@...l.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/6] unlink: monitor i_nlink

On Wed, 2006-08-09 at 18:11 +0100, Christoph Hellwig wrote:
> On Wed, Aug 09, 2006 at 09:57:32AM -0700, Dave Hansen wrote:
> > 
> > When a filesystem decrements i_nlink to zero, it means that a
> > write must be performed in order to drop the inode from the
> > filesystem.
> > 
> > We're shortly going to have keep filesystems from being remounted
> > r/o between the time that this i_nlink decrement and that write
> > occurs.  
> > 
> > So, add a little helper function to do the decrements.  We'll
> > tie into it in a bit to note when i_nlink hits zero.
> > 
> > Signed-off-by: Dave Hansen <haveblue@...ibm.com>
> 
> Acked-by: Christoph Hellwig <hch@....de>

> Note that we all (and especially Andrew :)) need to be carefull not to
> introduce unguarded i_nlink decrements again.  Dave, you'll probably need
> to do another audit when you introduce the real functionality.

Yup, I have my eyes on it.  git and mm commits should help as well.

-- Dave

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