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| author | Ben Blum <bblum@andrew.cmu.edu> | 2010-03-10 15:22:09 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-12 15:52:36 -0800 |
| commit | cf5d5941fda647fe3d2f2d00cf9e0245236a5f08 (patch) | |
| tree | deee6501f2f08089a2cd62732c3848a59a6f6a93 /Documentation/cgroups/cgroups.txt | |
| parent | e6a1105ba08b265023dd71a4174fb4a29ebc7083 (diff) | |
| download | lwn-cf5d5941fda647fe3d2f2d00cf9e0245236a5f08.tar.gz lwn-cf5d5941fda647fe3d2f2d00cf9e0245236a5f08.zip | |
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/cgroups.txt')
| -rw-r--r-- | Documentation/cgroups/cgroups.txt | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt index ae8a037a761e..764007b63921 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 |