From: Li Zefan Date: Fri, 25 Jul 2008 08:46:56 +0000 (-0700) Subject: cgroups: annotate two variables with __read_mostly X-Git-Tag: v2.6.27-rc1~391 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8947f9d5b361ce927be6d5c11fed57905b7a4100;p=linux-2.6 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 Acked-by: Paul Menage Acked-by: KOSAKI Motohiro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 6836a90636..70d083c6fb 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