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

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Message-ID: <20070711084737.GA17675@infradead.org>
Date:	Wed, 11 Jul 2007 09:47:37 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Mingming Cao <cmm@...ibm.com>
Cc:	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 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.

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