cgroups: annotate two variables with __read_mostly
- need_forkexit_callback will be read only after system boot.
- use_task_css_set_links will be read only after it's set.
And these 2 variables are checked when a new process is forked.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Paul Menage <menage@google.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 6836a90..70d083c 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -118,7 +118,7 @@
* extra work in the fork/exit path if none of the subsystems need to
* be called.
*/
-static int need_forkexit_callback;
+static int need_forkexit_callback __read_mostly;
static int need_mm_owner_callback __read_mostly;
/* convenient tests for these bits */
@@ -220,7 +220,7 @@
* task until after the first call to cgroup_iter_start(). This
* reduces the fork()/exit() overhead for people who have cgroups
* compiled into their kernel but not actually in use */
-static int use_task_css_set_links;
+static int use_task_css_set_links __read_mostly;
/* When we create or destroy a css_set, the operation simply
* takes/releases a reference count on all the cgroups referenced