Messages in this thread Patch in this message | | | Date | Thu, 05 Jun 2008 14:02:47 +0800 | From | Li Zefan <> | Subject | [PATCH] cgroup: anotate two variables with __read_mostly |
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- 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> --- kernel/cgroup.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 15ac0e1..f5a1273 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 -- 1.5.4.rc3
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