Hello, this patch series modifies ext4 so that we stop using ext4_writepage() for writeout of ordered data during transaction commit (through generic_writepages() from jbd2_journal_submit_inode_data_buffers()). Instead we directly call ext4_writepages() from the ext4_journal_submit_inode_data_buffers(). This is part of Christoph's effort to get rid of the .writepage() callback in all filesystems. Note that we still keep ext4_writepage() function for writeout of journalled data. That can be also dealt with but let's untangle things one by one. 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. Patches pass for me tests on both 1k and 4k filesystems with dioreadlock and without it. Honza
