On 2014/1/29 7:43, Tejun Heo wrote:

Hello,

This is the second take.  Changes from the last take[L] are

* Updated to reflect changes in fe1217c4f3f7 ("net: net_cls: move
  cgroupfs classid handling into core").

* Rebased on top of the current linus#master + some cgroup fix
  patches.

There's only one controller which makes use of the module support -
net_prio, which, non-coincidentally, isn't an actual resource
controller.  It's highly unlikely that the actual resource controlling
controllers are gonna be made modular and we aren't gonna add more
non-resource controllers either, so the value of module support is
strictly restricted to the particular controller.

The controller is fairly simple while module support in cgroup core
adds quite a bit of complexity.  Building the one controller as module
only saves less than half-page in vmlinux, which really can't justify
the additional complexity and (minute but existing) runtime overhead.

This patchset makes net_prio config options bool so that it can't be
built as modules and drops module support from cgroup core, which in
turn facilitates further simplification leading to removal of
cgroup_root_mutex by allowing iterating subsystems outside the
mutexes.

This patchset contains the following six patches.

 0001-cgroup-make-CONFIG_CGROUP_NET_PRIO-bool-and-drop-unn.patch
 0002-cgroup-drop-module-support.patch
 0003-cgroup-clean-up-cgroup_subsys-names-and-initializati.patch
 0004-cgroup-rename-cgroup_subsys-subsys_id-to-id.patch
 0005-cgroup-update-locking-in-cgroup_show_options.patch
 0006-cgroup-remove-cgroup_root_mutex.patch

0001-0002 drop cgroup module support.

0003-0004 are cleanups.

0005-0006 remove cgroup_root_mutex.

Acked-by: Li Zefan <redacted>