linux-kernel - Re: [EXT4 set 4][PATCH 4/5] i_version:ext4 inode version update

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Message-ID: <20070711120247.GA26370@infradead.org>
Date:	Wed, 11 Jul 2007 13:02:47 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Christoph Hellwig <hch@...radead.org>,
	Mingming Cao <cmm@...ibm.com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org,
	nfsv4@...ux-nfs.org
Subject: Re: [EXT4 set 4][PATCH 4/5] i_version:ext4 inode version update

On Wed, Jul 11, 2007 at 05:52:24AM -0600, Andreas Dilger wrote:
> On Jul 11, 2007  09:47 +0100, Christoph Hellwig wrote:
> > On Sun, Jul 01, 2007 at 03:37:45AM -0400, Mingming Cao wrote:
> > > This patch is on top of i_version_update_vfs.
> > > The i_version field of the inode is set on inode creation and incremented
> > > when the inode is being modified.
> > 
> > Which is not what i_version is supposed to do.  It'll get you tons of misses
> > for NFSv3 filehandles that rely on the generation staying the same for the
> > same file.  Please add a new field for the NFSv4 sequence counter instead
> > of making i_version unuseable.
> 
> You are confusing i_generation (the instance of this inode number) with
> i_version (whether this file has been modified)?

Yes, sorry.  Objection dropped.
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