From f48b80a5e22200347e91f96b8b237b24b93c7192 Mon Sep 17 00:00:00 2001 From: Vladimir Davydov Date: Thu, 12 Feb 2015 14:59:56 -0800 Subject: memcg: cleanup static keys decrement Move memcg_socket_limit_enabled decrement to tcp_destroy_cgroup (called from memcg_destroy_kmem -> mem_cgroup_sockets_destroy) and zap a bunch of wrapper functions. Although this patch moves static keys decrement from __mem_cgroup_free to mem_cgroup_css_free, it does not introduce any functional changes, because the keys are incremented on setting the limit (tcp or kmem), which can only happen after successful mem_cgroup_css_online. Signed-off-by: Vladimir Davydov Cc: Glauber Costa Cc: KAMEZAWA Hiroyuki Cc: Eric W. Biederman Cc: David S. Miller Cc: Johannes Weiner Acked-by: Michal Hocko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/memcontrol.c | 38 +++++--------------------------------- 1 file changed, 5 insertions(+), 33 deletions(-) (limited to 'mm') diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 419c06b1794a..d18d3a6e7337 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -519,16 +519,6 @@ struct cg_proto *tcp_proto_cgroup(struct mem_cgroup *memcg) } EXPORT_SYMBOL(tcp_proto_cgroup); -static void disarm_sock_keys(struct mem_cgroup *memcg) -{ - if (!memcg_proto_activated(&memcg->tcp_mem)) - return; - static_key_slow_dec(&memcg_socket_limit_enabled); -} -#else -static void disarm_sock_keys(struct mem_cgroup *memcg) -{ -} #endif #ifdef CONFIG_MEMCG_KMEM @@ -583,28 +573,8 @@ void memcg_put_cache_ids(void) struct static_key memcg_kmem_enabled_key; EXPORT_SYMBOL(memcg_kmem_enabled_key); -static void disarm_kmem_keys(struct mem_cgroup *memcg) -{ - if (memcg->kmem_acct_activated) - static_key_slow_dec(&memcg_kmem_enabled_key); - /* - * This check can't live in kmem destruction function, - * since the charges will outlive the cgroup - */ - WARN_ON(page_counter_read(&memcg->kmem)); -} -#else -static void disarm_kmem_keys(struct mem_cgroup *memcg) -{ -} #endif /* CONFIG_MEMCG_KMEM */ -static void disarm_static_keys(struct mem_cgroup *memcg) -{ - disarm_sock_keys(memcg); - disarm_kmem_keys(memcg); -} - static struct mem_cgroup_per_zone * mem_cgroup_zone_zoneinfo(struct mem_cgroup *memcg, struct zone *zone) { @@ -4092,7 +4062,11 @@ static void memcg_deactivate_kmem(struct mem_cgroup *memcg) static void memcg_destroy_kmem(struct mem_cgroup *memcg) { - memcg_destroy_kmem_caches(memcg); + if (memcg->kmem_acct_activated) { + memcg_destroy_kmem_caches(memcg); + static_key_slow_dec(&memcg_kmem_enabled_key); + WARN_ON(page_counter_read(&memcg->kmem)); + } mem_cgroup_sockets_destroy(memcg); } #else @@ -4523,8 +4497,6 @@ static void __mem_cgroup_free(struct mem_cgroup *memcg) free_mem_cgroup_per_zone_info(memcg, node); free_percpu(memcg->stat); - - disarm_static_keys(memcg); kfree(memcg); } -- cgit v1.2.3