tcp: uninline tcp_stream_memory_free() (d3cd4924) · Commits · 戴 / test

include/net/tcp.h

+1 −12

Original line number	Diff line number	Diff line
		@@ -1965,18 +1965,7 @@ static inline u32 tcp_notsent_lowat(const struct tcp_sock *tp)
		return tp->notsent_lowat ?: net->ipv4.sysctl_tcp_notsent_lowat;
		}

		/* @wake is one when sk_stream_write_space() calls us.
		* This sends EPOLLOUT only if notsent_bytes is half the limit.
		* This mimics the strategy used in sock_def_write_space().
		*/
		static inline bool tcp_stream_memory_free(const struct sock *sk, int wake)
		{
		const struct tcp_sock *tp = tcp_sk(sk);
		u32 notsent_bytes = READ_ONCE(tp->write_seq) -
		READ_ONCE(tp->snd_nxt);

		return (notsent_bytes << wake) < tcp_notsent_lowat(tp);
		}
		bool tcp_stream_memory_free(const struct sock *sk, int wake);

		#ifdef CONFIG_PROC_FS
		int tcp4_proc_init(void);

+14 −0

Original line number	Diff line number	Diff line
		@@ -2740,6 +2740,20 @@ void tcp4_proc_exit(void)
		}
		#endif /* CONFIG_PROC_FS */

		/* @wake is one when sk_stream_write_space() calls us.
		* This sends EPOLLOUT only if notsent_bytes is half the limit.
		* This mimics the strategy used in sock_def_write_space().
		*/
		bool tcp_stream_memory_free(const struct sock *sk, int wake)
		{
		const struct tcp_sock *tp = tcp_sk(sk);
		u32 notsent_bytes = READ_ONCE(tp->write_seq) -
		READ_ONCE(tp->snd_nxt);

		return (notsent_bytes << wake) < tcp_notsent_lowat(tp);
		}
		EXPORT_SYMBOL(tcp_stream_memory_free);

		struct proto tcp_prot = {
		.name = "TCP",
		.owner = THIS_MODULE,