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mm: memcontrol: rein in the CONFIG space madness

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What CONFIG_INET and CONFIG_LEGACY_KMEM guard inside the memory
controller code is insignificant, having these conditionals is not
worth the complication and fragility that comes with them.

[akpm@linux-foundation.org: rework mem_cgroup_css_free() statement ordering]
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Acked-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner
2016-01-20 15:02:47 -08:00
committed by Linus Torvalds
parent d55f90bfab
commit d886f4e483
4 changed files with 12 additions and 78 deletions
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14
include/linux/memcontrol.h
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@@ -233,9 +233,11 @@ struct mem_cgroup {
*/
struct mem_cgroup_stat_cpu __percpu *stat;
#if defined(CONFIG_MEMCG_LEGACY_KMEM) && defined(CONFIG_INET)
unsigned long socket_pressure;
/* Legacy tcp memory accounting */
struct cg_proto tcp_mem;
#endif
#ifndef CONFIG_SLOB
/* Index in the kmem_cache->memcg_params.memcg_caches array */
int kmemcg_id;
@@ -254,10 +256,6 @@ struct mem_cgroup {
struct wb_domain cgwb_domain;
#endif
#ifdef CONFIG_INET
unsigned long socket_pressure;
#endif
/* List of events which userspace want to receive */
struct list_head event_list;
spinlock_t event_list_lock;
@@ -712,15 +710,13 @@ void sock_update_memcg(struct sock *sk);
void sock_release_memcg(struct sock *sk);
bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
#if defined(CONFIG_MEMCG) && defined(CONFIG_INET)
#ifdef CONFIG_MEMCG
extern struct static_key_false memcg_sockets_enabled_key;
#define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
{
#ifdef CONFIG_MEMCG_LEGACY_KMEM
if (memcg->tcp_mem.memory_pressure)
return true;
#endif
do {
if (time_before(jiffies, memcg->socket_pressure))
return true;