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authorBen Blum <bblum@andrew.cmu.edu>2010-03-10 15:22:09 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-12 15:52:36 -0800
commitcf5d5941fda647fe3d2f2d00cf9e0245236a5f08 (patch)
treedeee6501f2f08089a2cd62732c3848a59a6f6a93 /Documentation/cgroups
parente6a1105ba08b265023dd71a4174fb4a29ebc7083 (diff)
downloadlinux-linaro-android-cf5d5941fda647fe3d2f2d00cf9e0245236a5f08.tar.gz
cgroups: subsystem module unloading
Provides support for unloading modular subsystems. This patch adds a new function cgroup_unload_subsys which is to be used for removing a loaded subsystem during module deletion. Reference counting of the subsystems' modules is moved from once (at load time) to once per attached hierarchy (in parse_cgroupfs_options and rebind_subsystems) (i.e., 0 or 1). Signed-off-by: Ben Blum <bblum@andrew.cmu.edu> Acked-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Paul Menage <menage@google.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/cgroups')
-rw-r--r--Documentation/cgroups/cgroups.txt5
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt
index ae8a037a761..764007b6392 100644
--- a/Documentation/cgroups/cgroups.txt
+++ b/Documentation/cgroups/cgroups.txt
@@ -489,8 +489,9 @@ Each subsystem should:
- define a cgroup_subsys object called <name>_subsys
If a subsystem can be compiled as a module, it should also have in its
-module initcall a call to cgroup_load_subsys(&its_subsys_struct). It
-should also set its_subsys.module = THIS_MODULE in its .c file.
+module initcall a call to cgroup_load_subsys(), and in its exitcall a
+call to cgroup_unload_subsys(). It should also set its_subsys.module =
+THIS_MODULE in its .c file.
Each subsystem may export the following methods. The only mandatory
methods are create/destroy. Any others that are null are presumed to