linux-ext4 - Re: [EXT4 set 4][PATCH 1/5] i_version:64 bit inode version

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Date:	Tue, 3 Jul 2007 18:15:22 -0400
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	Mingming Cao <cmm@...ibm.com>
Cc:	linux-fsdevel@...r.kernel.org,
	Trond Myklebust <trond.myklebust@....uio.no>,
	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org,
	nfsv4@...ux-nfs.org
Subject: Re: [EXT4 set 4][PATCH 1/5] i_version:64 bit inode version

On Mon, Jul 02, 2007 at 10:58:33AM -0400, Mingming Cao wrote:
> Trond or Bruce, can you please review these patch series and ack if you
> agrees?

Thanks, looks like what we need!

How will nfsd tell whether it can really on a given filesystem's
i_version, or whether it should fall back on ctime?

> As to performance concerns that raise before the inode version counter
> (at least for ext4) is done inside ext4_mark_inode_dirty), so there is
> no extra IO work to store this counter to disk.

So what's the motivation for the "noversion" mount option?

--b.
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