diff options
author | Tejun Heo <tj@kernel.org> | 2011-12-13 02:12:21 (GMT) |
---|---|---|
committer | Tejun Heo <tj@kernel.org> | 2011-12-13 02:12:21 (GMT) |
commit | 2f7ee5691eecb67c8108b92001a85563ea336ac5 (patch) | |
tree | 18cf60ea8a463f4a6cd59c68926ba4357ae8ff4c /mm | |
parent | 134d33737f9015761c3832f6b268fae6274aac7f (diff) | |
download | linux-2f7ee5691eecb67c8108b92001a85563ea336ac5.tar.xz |
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>
Diffstat (limited to 'mm')
-rw-r--r-- | mm/memcontrol.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 6aff93c..81640e7 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5298,8 +5298,9 @@ static void mem_cgroup_clear_mc(void) static int mem_cgroup_can_attach(struct cgroup_subsys *ss, struct cgroup *cgroup, - struct task_struct *p) + struct cgroup_taskset *tset) { + struct task_struct *p = cgroup_taskset_first(tset); int ret = 0; struct mem_cgroup *memcg = mem_cgroup_from_cont(cgroup); @@ -5337,7 +5338,7 @@ static int mem_cgroup_can_attach(struct cgroup_subsys *ss, static void mem_cgroup_cancel_attach(struct cgroup_subsys *ss, struct cgroup *cgroup, - struct task_struct *p) + struct cgroup_taskset *tset) { mem_cgroup_clear_mc(); } @@ -5454,9 +5455,9 @@ retry: static void mem_cgroup_move_task(struct cgroup_subsys *ss, struct cgroup *cont, - struct cgroup *old_cont, - struct task_struct *p) + struct cgroup_taskset *tset) { + struct task_struct *p = cgroup_taskset_first(tset); struct mm_struct *mm = get_task_mm(p); if (mm) { @@ -5471,19 +5472,18 @@ static void mem_cgroup_move_task(struct cgroup_subsys *ss, #else /* !CONFIG_MMU */ static int mem_cgroup_can_attach(struct cgroup_subsys *ss, struct cgroup *cgroup, - struct task_struct *p) + struct cgroup_taskset *tset) { return 0; } static void mem_cgroup_cancel_attach(struct cgroup_subsys *ss, struct cgroup *cgroup, - struct task_struct *p) + struct cgroup_taskset *tset) { } static void mem_cgroup_move_task(struct cgroup_subsys *ss, struct cgroup *cont, - struct cgroup *old_cont, - struct task_struct *p) + struct cgroup_taskset *tset) { } #endif |