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Miller" , Jakub Kicinski Cc: netdev , Eric Dumazet , Eric Dumazet Subject: [PATCH net-next 1/2] tcp: uninline tcp_stream_memory_free() Date: Fri, 13 Nov 2020 07:08:08 -0800 Message-Id: <20201113150809.3443527-2-eric.dumazet@gmail.com> X-Mailer: git-send-email 2.29.2.299.gdc1121823c-goog In-Reply-To: <20201113150809.3443527-1-eric.dumazet@gmail.com> References: <20201113150809.3443527-1-eric.dumazet@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Eric Dumazet Both IPv4 and IPv6 needs it via a function pointer. Following patch will avoid the indirect call. Signed-off-by: Eric Dumazet --- include/net/tcp.h | 13 +------------ net/ipv4/tcp_ipv4.c | 14 ++++++++++++++ 2 files changed, 15 insertions(+), 12 deletions(-) diff --git a/include/net/tcp.h b/include/net/tcp.h index 4aba0f069b05d68b2595ec9a3bf8da7786437fde..d643ee4e42495f0b28c87e79d6192c23f8cdba7f 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -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); diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 7352c097ae48f7df6caba1ae5b98dccfecd79d1a..c2d5132c523c8d4258e407c4cc5112840b07805e 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -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,