Hello,
For unified hierarchy, a css's (cgroup_subsys_state) lifetime will be
different from that of the associated cgroup. css's may be created
and destroyed dynamically over the lifetime of a single cgroup. The
previous changes decoupled css destruction from cgroup's. This
patchset decouples css creation from cgroup's.
This patchset contains the following nine patches.
0001-cgroup-fix-css-leaks-on-online_css-failure.patch
0002-cgroup-css-iterations-and-css_from_dir-are-safe-unde.patch
0003-cgroup-make-for_each_subsys-useable-under-cgroup_roo.patch
0004-cgroup-move-css_id-commit-from-cgroup_populate_dir-t.patch
0005-cgroup-reorder-operations-in-cgroup_create.patch
0006-cgroup-combine-css-handling-loops-in-cgroup_create.patch
0007-cgroup-factor-out-cgroup_subsys_state-creation-into-.patch
0008-cgroup-implement-for_each_css.patch
0009-cgroup-remove-for_each_root_subsys.patch
0001 is a fix for an existing leak issue in the creation error
handling path.
0002-0004 are prep patches. Note that 0004 will conflict with css_id
removal patch.
0005-0007 collect css creation operations into single loop and factor
it out into create_css().
0008-0009 are somewhat tangential. As everything is css based now and
the enabled set of css's might be differ depending on the specific
cgroup in the future, they introduce for_each_css() and replace most
uses of for_each_root_subsys() with it. The two left overs are
opencoded and for_each_root_subsys() and the related logic are
removed.
This patchset shouldn't bring any userland noticeable behavior
changes. It's on top of cgroup/for-3.12 d1625964da ("cgroup: fix
cgroup_css() invocation in css_from_id()") and available in the
following git branch.
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-create_css
diffstat follows.
include/linux/cgroup.h | 10 -
kernel/cgroup.c | 348 ++++++++++++++++++++++++++-----------------------
2 files changed, 187 insertions(+), 171 deletions(-)
Thanks.
--
tejun
_______________________________________________
Containers mailing list
Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linuxfoundation.org/mailman/listinfo/containers
