diff options
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 19 |
1 files changed, 5 insertions, 14 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 2900e58738cd..fefb46c16de7 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -601,26 +601,17 @@ void tcp_rcv_space_adjust(struct sock *sk) if (sock_net(sk)->ipv4.sysctl_tcp_moderate_rcvbuf && !(sk->sk_userlocks & SOCK_RCVBUF_LOCK)) { int rcvmem, rcvbuf; - u64 rcvwin; + u64 rcvwin, grow; /* minimal window to cope with packet losses, assuming * steady state. Add some cushion because of small variations. */ rcvwin = ((u64)copied << 1) + 16 * tp->advmss; - /* If rate increased by 25%, - * assume slow start, rcvwin = 3 * copied - * If rate increased by 50%, - * assume sender can use 2x growth, rcvwin = 4 * copied - */ - if (copied >= - tp->rcvq_space.space + (tp->rcvq_space.space >> 2)) { - if (copied >= - tp->rcvq_space.space + (tp->rcvq_space.space >> 1)) - rcvwin <<= 1; - else - rcvwin += (rcvwin >> 1); - } + /* Accommodate for sender rate increase (eg. slow start) */ + grow = rcvwin * (copied - tp->rcvq_space.space); + do_div(grow, tp->rcvq_space.space); + rcvwin += (grow << 1); rcvmem = SKB_TRUESIZE(tp->advmss + MAX_TCP_HEADER); while (tcp_win_from_space(sk, rcvmem) < tp->advmss) |