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mm: memcontrol: generalize the socket accounting jump label

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The unified hierarchy memory controller is going to use this jump label
as well to control the networking callbacks.  Move it to the memory
controller code and give it a more generic name.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: David S. Miller <davem@davemloft.net>
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 2016-01-14 15:21:20 -08:00 committed by Linus Torvalds
parent baac50bbc3
commit 80e95fe0fd
5 changed files with 8 additions and 14 deletions
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3
include/linux/memcontrol.h
View File

@ -681,11 +681,14 @@ 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_KMEM) && defined(CONFIG_INET)
extern struct static_key memcg_sockets_enabled_key;
#define mem_cgroup_sockets_enabled static_key_false(&memcg_sockets_enabled_key)
static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
{
return memcg->tcp_mem.memory_pressure;
}
#else
#define mem_cgroup_sockets_enabled 0
static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
{
return false;

7
include/net/sock.h
View File

@ -1079,13 +1079,6 @@ static inline void sk_refcnt_debug_release(const struct sock *sk)
#define sk_refcnt_debug_release(sk) do { } while (0)
#endif /* SOCK_REFCNT_DEBUG */
#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_NET)
extern struct static_key memcg_socket_limit_enabled;
#define mem_cgroup_sockets_enabled static_key_false(&memcg_socket_limit_enabled)
#else
#define mem_cgroup_sockets_enabled 0
#endif
static inline bool sk_stream_memory_free(const struct sock *sk)
{
if (sk->sk_wmem_queued >= sk->sk_sndbuf)

3
mm/memcontrol.c
View File

@ -291,6 +291,9 @@ static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id)
/* Writing them here to avoid exposing memcg's inner layout */
#if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM)
struct static_key memcg_sockets_enabled_key;
EXPORT_SYMBOL(memcg_sockets_enabled_key);
void sock_update_memcg(struct sock *sk)
{
struct mem_cgroup *memcg;

5
net/core/sock.c
View File

@ -202,11 +202,6 @@ EXPORT_SYMBOL(sk_net_capable);
static struct lock_class_key af_family_keys[AF_MAX];
static struct lock_class_key af_family_slock_keys[AF_MAX];
#if defined(CONFIG_MEMCG_KMEM)
struct static_key memcg_socket_limit_enabled;
EXPORT_SYMBOL(memcg_socket_limit_enabled);
#endif
/*
* Make lock validator output more readable. (we pre-construct these
* strings build-time, so that runtime initialization of socket

4
net/ipv4/tcp_memcontrol.c
View File

@ -34,7 +34,7 @@ void tcp_destroy_cgroup(struct mem_cgroup *memcg)
return;
if (memcg->tcp_mem.active)
static_key_slow_dec(&memcg_socket_limit_enabled);
static_key_slow_dec(&memcg_sockets_enabled_key);
}
static int tcp_update_limit(struct mem_cgroup *memcg, unsigned long nr_pages)
@ -65,7 +65,7 @@ static int tcp_update_limit(struct mem_cgroup *memcg, unsigned long nr_pages)
* because when this value change, the code to process it is not
* patched in yet.
*/
static_key_slow_inc(&memcg_socket_limit_enabled);
static_key_slow_inc(&memcg_sockets_enabled_key);
memcg->tcp_mem.active = true;
}