tcp: start receiver buffer autotuning sooner
Subsystems (3)
PATCH 1/1 tcp: start receiver buffer autotuning sooner
Previously receiver buffer auto-tuning starts after receiving one advertised window amount of data. After the initial receiver buffer was raised by patch a337531b942b ("tcp: up initial rmem to 128KB and SYN rwin to around 64KB"), the reciver buffer may take too long to start raising. To address this issue, this patch lowers the initial bytes expected to receive roughly the expected sender's initial window.
--- net/ipv4/tcp_input.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
net/ipv4/tcp_input.c +1 -1
@@ -438,7 +438,7 @@ void tcp_init_buffer_space(struct sock *sk)if (!(sk->sk_userlocks &SOCK_SNDBUF_LOCK ))tcp_sndbuf_expand (sk); - tp->rcvq_space.space = tp->rcv_wnd; + tp->rcvq_space.space =min_t (u32, tp->rcv_wnd,TCP_INIT_CWND * tp->advmss);tcp_mstamp_refresh (tp); tp->rcvq_space.time = tp->tcp_mstamp; tp->rcvq_space.seq = tp->copied_seq;
Signature · 1 line
2.19.0.605.g01d371f741-goog
From: Yuchung Cheng <[email protected]>
Date: Mon, 1 Oct 2018 15:42:32 -0700
Quoted 8 lines
Previously receiver buffer auto-tuning starts after receiving one advertised window amount of data. After the initial receiver buffer was raised by patch
a337531b942b("tcp: up initial rmem to 128KB and SYN rwin to around 64KB"), the reciver buffer may take too long to start raising. To address this issue, this patch lowers the initial bytes expected to receive roughly the expected sender's initial window.
Quoted 6 lines
Fixes a337531b942b ("tcp: up initial rmem to 128KB and SYN rwin to around 64KB")Signed-off-by Yuchung Cheng <[email protected]>Signed-off-by Wei Wang <[email protected]>Signed-off-by Neal Cardwell <[email protected]>Signed-off-by Eric Dumazet <[email protected]>Reviewed-by Soheil Hassas Yeganeh <[email protected]>
Applied, sorry for applying v1 instead of v2 the the rmem increasing patch. :-/
Quoted 18 lines · David Miller
From: Yuchung Cheng <[email protected]>
Date: Mon, 1 Oct 2018 15:42:32 -0700Quoted 8 lines
Previously receiver buffer auto-tuning starts after receiving one advertised window amount of data. After the initial receiver buffer was raised by patch
a337531b942b("tcp: up initial rmem to 128KB and SYN rwin to around 64KB"), the reciver buffer may take too long to start raising. To address this issue, this patch lowers the initial bytes expected to receive roughly the expected sender's initial window.Quoted 6 lines
Fixes a337531b942b ("tcp: up initial rmem to 128KB and SYN rwin to around 64KB")Signed-off-by Yuchung Cheng <[email protected]>Signed-off-by Wei Wang <[email protected]>Signed-off-by Neal Cardwell <[email protected]>Signed-off-by Eric Dumazet <[email protected]>Reviewed-by Soheil Hassas Yeganeh <[email protected]>
Quoted 2 lines
Applied, sorry for applying v1 instead of v2 the the rmem increasing patch. :-/
No problem thanks for the fast response!