Hi,

  So I've split and ported ordered mode rewrite for ext4+jbd2.
The core of the rewrite are two patches

jbd2-Implement-data-ordered-mode-handling-via-inode.patch
ext4-Use-new-framework-for-data-ordered-mode-in-JBD.patch

They also need two trivial fixes:
vfs-export-filemap_fdatawrite_range.patch
ext4-Use-new-framework-for-data-ordered-mode-in-JBD.patch

And finally there's a patch removing old ordered mode from jbd2:
jbd2-Remove-data-ordered-mode-support-using-jbd-buf.patch

I've created the patches to be added to the ext4 patch queue just
after inversion of page lock and transaction start.

I have refreshed the following patches in the ext4 queue to apply cleanly
and also fixed some typos in them and added one BUG_ON():

ext4-delalloc-sync-hang-with-journal-lock-inverse-fix.patch
ext4-delalloc-inverse-jbd-and-page-lock-ordering.patch
ext4-inverse-jbd-and-page-locking-order.patch

Finally, I've rewritten checks in writepage so
ext4-Add-validation-to-jbd-lock-inversion-patch-and.patch
should be replaced with
ext4-add-checks-to-writepage

as we spoke about it with Aneesh.

All the patches are attached and I'll also post the new ones separately for
more convenient review. The tests for 4k blocksize run fine for me. The
kernel oopses for 1k blocksize because of a problem in ext4_page_mkwrite()
- I'll post that in a separate mail. If noone objects, patches can be added
to ext4 patch queue.

								Honza
-- 
Jan Kara <jack@suse.cz>
SUSE Labs, CR