From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Morton <akpm@osdl.org>
Subject: Re: [RFC PATCH] ext3 writepage() journal avoidance
Date: Thu, 9 Mar 2006 17:16:32 -0800
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To: Badari Pulavarty <pbadari@us.ibm.com>
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Badari Pulavarty <pbadari@us.ibm.com> wrote:
>
> >Don't forget that ext3 supports journalled-mode files on ordered- or
> >writeback-mounted filesystems, via `chattr +j'.  
> >
> 
> Wow !! Never knew that. I assume we switch mapping->a_ops for this inode ?

Yes, that's all tucked away in ext3_should_journal_data().