cgroup: introduce cgroup_taskset and use it in subsys->can_attach(), cancel_attach...
authorTejun Heo <tj@kernel.org>
Tue, 13 Dec 2011 02:12:21 +0000 (18:12 -0800)
committerTejun Heo <tj@kernel.org>
Tue, 13 Dec 2011 02:12:21 +0000 (18:12 -0800)
commit2f7ee5691eecb67c8108b92001a85563ea336ac5
tree18cf60ea8a463f4a6cd59c68926ba4357ae8ff4c
parent134d33737f9015761c3832f6b268fae6274aac7f
cgroup: introduce cgroup_taskset and use it in subsys->can_attach(), cancel_attach() and attach()

Currently, there's no way to pass multiple tasks to cgroup_subsys
methods necessitating the need for separate per-process and per-task
methods.  This patch introduces cgroup_taskset which can be used to
pass multiple tasks and their associated cgroups to cgroup_subsys
methods.

Three methods - can_attach(), cancel_attach() and attach() - are
converted to use cgroup_taskset.  This unifies passed parameters so
that all methods have access to all information.  Conversions in this
patchset are identical and don't introduce any behavior change.

-v2: documentation updated as per Paul Menage's suggestion.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Paul Menage <paul@paulmenage.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: James Morris <jmorris@namei.org>
Documentation/cgroups/cgroups.txt
include/linux/cgroup.h
kernel/cgroup.c
kernel/cgroup_freezer.c
kernel/cpuset.c
mm/memcontrol.c
security/device_cgroup.c