linux-ext4 - Re: [PATCH v2 0/11] ext4: Stop using ext4_writepage() for writeout of ordered data

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Date:   Sat, 3 Dec 2022 22:56:25 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Jan Kara <jack@...e.cz>
Cc:     Ted Tso <tytso@....edu>, linux-ext4@...r.kernel.org,
        Christoph Hellwig <hch@...radead.org>,
        Ritesh Harjani <ritesh.list@...il.com>
Subject: Re: [PATCH v2 0/11] ext4: Stop using ext4_writepage() for writeout
 of ordered data

On Fri, Dec 02, 2022 at 07:39:25PM +0100, Jan Kara wrote:
> I have also modified ext4_writepages() to use write_cache_pages() instead of
> generic_writepages() so now we don't expose .writepage hook at all. We still
> keep ext4_writepage() as a callback for write_cache_pages().

Nice!

> We should refactor
> that path as well and get rid of ext4_writepage() completely but that is for a
> separate cleanup.

Agreed.

> Also note that jbd2 still uses generic_writepages() in its
> jbd2_journal_submit_inode_data_buffers() helper because it is still used from
> OCFS2. Again, something to be dealt with in a separate patchset.

Indeed.  I think simply moving jbd2_journal_submit_inode_data_buffers to
ocfs2 and then open coding generic_writepages will be the right thing to
do here.