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tcp: shrink tcp_timewait_sock by 8 bytes 

Reducing tcp_timewait_sock from 280 bytes to 272 bytes
allows SLAB to pack 15 objects per page instead of 14 (on x86)

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2015-10-08 19:33:24 -07:00 committed by David S. Miller
parent ed53d0ab76
commit d475f090bf
2 changed files with 4 additions and 2 deletions
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4
include/linux/tcp.h
View File

@ -356,8 +356,8 @@ static inline struct tcp_sock *tcp_sk(const struct sock *sk)
struct tcp_timewait_sock {
struct inet_timewait_sock tw_sk;
u32 tw_rcv_nxt;
u32 tw_snd_nxt;
#define tw_rcv_nxt tw_sk.__tw_common.skc_tw_rcv_nxt
#define tw_snd_nxt tw_sk.__tw_common.skc_tw_snd_nxt
u32 tw_rcv_wnd;
u32 tw_ts_offset;
u32 tw_ts_recent;

2
include/net/sock.h
View File

@ -229,6 +229,7 @@ struct sock_common {
union {
int skc_incoming_cpu;
u32 skc_rcv_wnd;
u32 skc_tw_rcv_nxt; /* struct tcp_timewait_sock */
};
atomic_t skc_refcnt;
@ -237,6 +238,7 @@ struct sock_common {
union {
u32 skc_rxhash;
u32 skc_window_clamp;
u32 skc_tw_snd_nxt; /* struct tcp_timewait_sock */
};
/* public: */
};