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authorPaul Menage <menage@google.com>2007-10-18 23:39:32 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-19 11:53:36 -0700
commitbbcb81d09104f0d440974b994c1fc508ccbe9503 (patch)
tree6d9ef3e2c611bb0a8f63519196f7bd7725b7ea1a /include/linux
parentddbcc7e8e50aefe467c01cac3dec71f118cd8ac2 (diff)
Task Control Groups: add tasks file interface
Add the per-directory "tasks" file for cgroupfs mounts; this allows the user to determine which tasks are members of a cgroup by reading a cgroup's "tasks", and to move a task into a cgroup by writing its pid to its "tasks". Signed-off-by: Paul Menage <menage@google.com> Cc: Serge E. Hallyn <serue@us.ibm.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Paul Jackson <pj@sgi.com> Cc: Kirill Korotaev <dev@openvz.org> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/cgroup.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 60735dcf427..e2dd44f68f9 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -144,6 +144,16 @@ int cgroup_is_removed(const struct cgroup *cont);
int cgroup_path(const struct cgroup *cont, char *buf, int buflen);
+int __cgroup_task_count(const struct cgroup *cont);
+static inline int cgroup_task_count(const struct cgroup *cont)
+{
+ int task_count;
+ rcu_read_lock();
+ task_count = __cgroup_task_count(cont);
+ rcu_read_unlock();
+ return task_count;
+}
+
/* Return true if the cgroup is a descendant of the current cgroup */
int cgroup_is_descendant(const struct cgroup *cont);