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Commit d475f090 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

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: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ed53d0ab

include/linux/tcp.h

+2 −2
Original line number Diff line number Diff line
@@ -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;

include/net/sock.h

+2 −0
Original line number Diff line number Diff line
@@ -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: */

};