Hello, Linus.
Please note that cgroup/for-3.11 branch pulled in percpu/for-3.11 to
convert cgroup_subsys_state reference counting to percpu-ref and this
pull request assumes that percpu/for-3.11 is pulled in first.
This pull request contains the following changes.
* cgroup_subsys_state (css) reference counting has been converted to
percpu-ref. css is what each resource controller embeds into its
own control structure and perform reference count against. It may
be used in hot paths of various subsystems and is similar to module
refcnt in that aspect. For example, block-cgroup's css refcnting
was showing up a lot in Mikulaus's device-mapper scalability work
and this should alleviate it.
* cgroup subtree iterator has been updated so that RCU read lock can
be released after grabbing reference. This allows simplifying its
users which requires blocking which used to build iteration list
under RCU read lock and then traverse it outside. This pull request
contains simplification of cgroup core and device-cgroup. A
separate pull request will update cpuset.
* Fixes for various bugs including corner race conditions and RCU
usage bugs.
* A lot of cleanups and some prepartory work for the planned unified
hierarchy support.
The changes are available in the following git branch
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-3.11
for you to fetch changes up to c7ba8287cd11f2fc9e2feee9e1fac34b7293658f:
cgroup: CGRP_ROOT_SUBSYS_BOUND should also be ignored when mounting an existing hierarchy (2013-06-29 14:06:10 -0700)
Thanks.
----------------------------------------------------------------
Greg KH (1):
cgroup.h: remove some functions that are now gone
Li Zefan (6):
cgroup: fix umount vs cgroup_cfts_commit() race
cgroup: fix umount vs cgroup_event_remove() race
cgroup: fix memory leak in cgroup_rm_cftypes()
cgroup: make serial_nr_cursor available throughout cgroup.c
cgroup: convert cgroup_cft_commit() to use cgroup_for_each_descendant_pre()
cgroup: rename cont to cgrp
Tejun Heo (43):
cgroup: refactor hierarchy_id handling
cgroup: drop hierarchy_id_lock
cgroup: make hierarchy_id use cyclic idr
cgroup: implement task_cgroup_path_from_hierarchy()
Merge branch 'for-3.10-fixes' into for-3.11
cgroup: make cgroup_is_removed() static
cgroup: add cgroup->serial_nr and implement cgroup_next_sibling()
cgroup: update iterators to use cgroup_next_sibling()
device_cgroup: simplify cgroup tree walk in propagate_exception()
cgroup: mark "tasks" cgroup file as insane
cgroup: mark "notify_on_release" and "release_agent" cgroup files insane
cgroup: clean up the cftype array for the base cgroup files
cgroup: remove now unused css_depth()
cgroup: consistently use @cset for struct css_set variables
cgroup: bring some sanity to naming around cg_cgroup_link
cgroup: use kzalloc() instead of kmalloc()
cgroup: clean up css_[try]get() and css_put()
cgroup: rename CGRP_REMOVED to CGRP_DEAD
cgroup: drop unnecessary RCU dancing from __put_css_set()
cgroup: remove cgroup->count and use
cgroup: reorder the operations in cgroup_destroy_locked()
cgroup: split cgroup destruction into two steps
Merge branch 'for-3.11' of git://git.kernel.org/.../tj/percpu into for-3.11
cgroup: use percpu refcnt for cgroup_subsys_states
cgroup: update sane_behavior documentation
cgroup: disallow rename(2) if sane_behavior
cgroup: clean up cgroup_serial_nr_cursor
cgroup: convert CFTYPE_* flags to enums
cgroup: prefix global variables with "cgroup_"
cgroup: remove cgroup->actual_subsys_mask
cgroup: clean up find_css_set() and friends
cgroup: s/for_each_subsys()/for_each_root_subsys()/
cgroup: move init_css_set initialization inside cgroup_mutex
cgroup: implement for_each_[builtin_]subsys()
cgroup: reserve ID 0 for dummy_root and 1 for unified hierarchy
cgroup: fix cgroupfs_root early destruction path
cgroup: grab cgroup_mutex in drop_parsed_module_refcounts()
cgroup: fix RCU accesses to task->cgroups
cgroup: fix RCU accesses around task->cgroups
cgroup: always use RCU accessors for protected accesses
cgroup: fix deadlock on cgroup_mutex via drop_parsed_module_refcounts()
cgroup: CGRP_ROOT_SUBSYS_BOUND should be ignored when comparing mount options
cgroup: CGRP_ROOT_SUBSYS_BOUND should also be ignored when mounting an existing hierarchy
include/linux/cgroup.h | 222 ++++---
kernel/cgroup.c | 1536 ++++++++++++++++++++++++++--------------------
security/device_cgroup.c | 56 +-
3 files changed, 1029 insertions(+), 785 deletions(-)
--
tejun
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