Commit 1081312f authored by Michal Hocko's avatar Michal Hocko Committed by Linus Torvalds

memcg: cleanup mem_cgroup_init comment

We should encourage all memcg controller initialization independent on a
specific mem_cgroup to be done here rather than exploit css_alloc
callback and assume that nothing happens before root cgroup is created.
Signed-off-by: default avatarMichal Hocko <mhocko@suse.cz>
Acked-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
Cc: Tejun Heo <htejun@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e4777496
......@@ -6830,10 +6830,12 @@ static void __init enable_swap_cgroup(void)
#endif
/*
* The rest of init is performed during ->css_alloc() for root css which
* happens before initcalls. hotcpu_notifier() can't be done together as
* it would introduce circular locking by adding cgroup_lock -> cpu hotplug
* dependency. Do it from a subsys_initcall().
* subsys_initcall() for memory controller.
*
* Some parts like hotcpu_notifier() have to be initialized from this context
* because of lock dependencies (cgroup_lock -> cpu hotplug) but basically
* everything that doesn't depend on a specific mem_cgroup structure should
* be initialized from here.
*/
static int __init mem_cgroup_init(void)
{
......
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