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authorLi Zefan <lizf@cn.fujitsu.com>2008-07-25 01:46:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-25 10:53:35 -0700
commit8947f9d5b361ce927be6d5c11fed57905b7a4100 (patch)
treef4a7d212cfef8889a60022c8ff3c9cfcf97962c2
parent71cbb949d17d4d776abd547135feb7f3282405c8 (diff)
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>
-rw-r--r--kernel/cgroup.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 6836a906363..70d083c6fb6 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -118,7 +118,7 @@ static int root_count;
* 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 @@ static struct hlist_head *css_set_hash(struct cgroup_subsys_state *css[])
* 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