[PATCHSET v2 block/for-4.2/writeback] ext4: implement cgroup writeback support

[Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

Hello,

This is v2.  The only change from the last take[L] is

* Updated to reflect the earlier MS_CGROUPWB -> SB_I_CGROUPWB change.

This patchset implements cgroup writeback support for ext4, which is
enabled for writeback and ordered data modes.  This patchset contains
the following two patches.

 0001-ext4-replace-ext4_io_submit-io_op-with-io_wbc.patch
 0002-ext4-implement-cgroup-writeback-support.patch

0001 is a prep patch which replaces io_submit->io_op w/ ->io_wbc.
0002 implements cgroup writeback support.

This patchset is on top of

 [1] block/for-4.2/writeback
+[2] [PATCHSET] cgroup, writeback: misc updates for cgroup writeback support

and available on in the following git branch.

 git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-cgroup-writeback-ext4

diffstat follows.  Thanks.

 fs/ext4/ext4.h    |    2 +-
 fs/ext4/page-io.c |    8 ++++++--
 fs/ext4/super.c   |    2 ++
 3 files changed, 9 insertions(+), 3 deletions(-)

--
tejun

[L] http://lkml.kernel.org/g/1434146543-26358-1-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org
[1] git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-4.2/writeback
[2] http://lkml.kernel.org/g/1434494912-31043-1-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org