linux-ext4 - nobh mount option in ext3/4?

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Message-ID: <20100531124051.GA17262@lst.de>
Date:	Mon, 31 May 2010 14:40:51 +0200
From:	Christoph Hellwig <hch@....de>
To:	jack@...e.cz, tytso@....edu
Cc:	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: nobh mount option in ext3/4?

ext3 and ext4 heave inherited the nobh option from ext2, but the
implementation is rather interesting.  Except for the usual
option parsing / display it's only respected in
ext3_writeback_writepage/ext4_writepage and the truncate_page
implementation.  Given that we don't take any more than usual
care to not create buffers heads during read this is not going
to effect a whole lot.

Is there a good reason to keep these options and the associated
code complexity?  I'd be rather surprised if it gets any sufficient
testing..
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