linux-ext4 - Re: [PATCH 3/3] ext4: Use separate super_operations structure for no

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Date:	Fri, 1 May 2009 03:04:22 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Theodore Ts'o <tytso@....edu>
Cc:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH 3/3] ext4: Use separate super_operations structure for
	no_journal filesystems

On Fri, May 01, 2009 at 12:37:17AM -0400, Theodore Ts'o wrote:
> By using a separate super_operations structure for filesystems that
> have and don't have journals, we can simply ext4_write_super() ---
> which is only needed when no journal is present --- and ext4_freeze(),
> ext4_unfreeze(), and ext4_sync_fs(), which are only needed when the
> journal is present.

FYI: I will make ->sync_fs mandatory pretty soon.  At that point
->write_super will only be left for d_dirt-induced periodic writeback.
(Still have to figure out what to do about file_fsync, but that won't
affect ext4)

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