diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2007-11-21 22:08:50 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 14:54:40 -0800 |
| commit | ebb53d75657f86587ac8cf3e38ab0c860a8e3d4f (patch) | |
| tree | 2b1d63cb8ee54b19589d6d13a693147001e642ad /include/net/sock.h | |
| parent | de4d1db369785c29d68915edfee0cb70e8199f4c (diff) | |
[NET] proto: Use pcounters for the inuse field
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/sock.h')
| -rw-r--r-- | include/net/sock.h | 59 |
1 files changed, 8 insertions, 51 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index 9c55af8e5f81..e329d05f7995 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -47,6 +47,7 @@ #include <linux/module.h> #include <linux/lockdep.h> #include <linux/netdevice.h> +#include <linux/pcounter.h> #include <linux/skbuff.h> /* struct sk_buff */ #include <linux/mm.h> #include <linux/security.h> @@ -565,14 +566,9 @@ struct proto { void (*unhash)(struct sock *sk); int (*get_port)(struct sock *sk, unsigned short snum); -#ifdef CONFIG_SMP /* Keeping track of sockets in use */ - void (*inuse_add)(struct proto *prot, int inc); - int (*inuse_getval)(const struct proto *prot); - int *inuse_ptr; -#else - int inuse; -#endif + struct pcounter inuse; + /* Memory pressure */ void (*enter_memory_pressure)(void); atomic_t *memory_allocated; /* Current allocated memory. */ @@ -607,35 +603,8 @@ struct proto { #endif }; -/* - * Special macros to let protos use a fast version of inuse{get|add} - * using a static percpu variable per proto instead of an allocated one, - * saving one dereference. - * This might be changed if/when dynamic percpu vars become fast. - */ -#ifdef CONFIG_SMP -# define DEFINE_PROTO_INUSE(NAME) \ -static DEFINE_PER_CPU(int, NAME##_inuse); \ -static void NAME##_inuse_add(struct proto *prot, int inc) \ -{ \ - __get_cpu_var(NAME##_inuse) += inc; \ -} \ - \ -static int NAME##_inuse_getval(const struct proto *prot)\ -{ \ - int res = 0, cpu; \ - \ - for_each_possible_cpu(cpu) \ - res += per_cpu(NAME##_inuse, cpu); \ - return res; \ -} -# define REF_PROTO_INUSE(NAME) \ - .inuse_add = NAME##_inuse_add, \ - .inuse_getval = NAME##_inuse_getval, -#else -# define DEFINE_PROTO_INUSE(NAME) -# define REF_PROTO_INUSE(NAME) -#endif +#define DEFINE_PROTO_INUSE(NAME) DEFINE_PCOUNTER(NAME) +#define REF_PROTO_INUSE(NAME) PCOUNTER_MEMBER_INITIALIZER(NAME, .inuse) extern int proto_register(struct proto *prot, int alloc_slab); extern void proto_unregister(struct proto *prot); @@ -668,29 +637,17 @@ static inline void sk_refcnt_debug_release(const struct sock *sk) /* Called with local bh disabled */ static __inline__ void sock_prot_inc_use(struct proto *prot) { -#ifdef CONFIG_SMP - prot->inuse_add(prot, 1); -#else - prot->inuse++; -#endif + pcounter_add(&prot->inuse, 1); } static __inline__ void sock_prot_dec_use(struct proto *prot) { -#ifdef CONFIG_SMP - prot->inuse_add(prot, -1); -#else - prot->inuse--; -#endif + pcounter_add(&prot->inuse, -1); } static __inline__ int sock_prot_inuse(struct proto *proto) { -#ifdef CONFIG_SMP - return proto->inuse_getval(proto); -#else - return proto->inuse; -#endif + return pcounter_getval(&proto->inuse); } /* With per-bucket locks this operation is not-atomic, so that |