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authorSridhar Samudrala <samudrala.sridhar@gmail.com>2010-05-30 22:24:39 +0200
committerMichael S. Tsirkin <mst@redhat.com>2010-07-28 15:45:12 +0300
commitd7926ee38f5c6e0bbebe712304f99a4c67e40f84 (patch)
tree2feae78726dae032741f81fc9590d61693a182f5 /kernel
parentc23f3445e68e1db0e74099f264bc5ff5d55ebdeb (diff)
downloadvexpress-lsk-d7926ee38f5c6e0bbebe712304f99a4c67e40f84.tar.gz
cgroups: Add an API to attach a task to current task's cgroup
Add a new kernel API to attach a task to current task's cgroup in all the active hierarchies. Signed-off-by: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Paul Menage <menage@google.com> Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/cgroup.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 422cb19f156..37642ad9cca 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1788,6 +1788,29 @@ out:
return retval;
}
+/**
+ * cgroup_attach_task_current_cg - attach task 'tsk' to current task's cgroup
+ * @tsk: the task to be attached
+ */
+int cgroup_attach_task_current_cg(struct task_struct *tsk)
+{
+ struct cgroupfs_root *root;
+ struct cgroup *cur_cg;
+ int retval = 0;
+
+ cgroup_lock();
+ for_each_active_root(root) {
+ cur_cg = task_cgroup_from_root(current, root);
+ retval = cgroup_attach_task(cur_cg, tsk);
+ if (retval)
+ break;
+ }
+ cgroup_unlock();
+
+ return retval;
+}
+EXPORT_SYMBOL_GPL(cgroup_attach_task_current_cg);
+
/*
* Attach task with pid 'pid' to cgroup 'cgrp'. Call with cgroup_mutex
* held. May take task_lock of task