From: Eric Dumazet <eric.dumazet@gmail.com>
To: David Miller <davem@davemloft.net>
Cc: netdev <netdev@vger.kernel.org>
Subject: [PATCH net-next] tcp: use TCP_INIT_CWND in tcp_fixup_sndbuf()
Date: Fri, 14 Oct 2011 06:24:42 +0200 [thread overview]
Message-ID: <1318566282.2533.63.camel@edumazet-laptop> (raw)
Initial cwnd being 10 (TCP_INIT_CWND) instead of 3, change
tcp_fixup_sndbuf() to get more than 16384 bytes (sysctl_tcp_wmem[1]) in
initial sk_sndbuf
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
---
I believe a similar change in tcp_fixup_rcvbuf() is needed too.
net/ipv4/tcp_input.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index c1653fe..1e848b2 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -267,11 +267,9 @@ static void tcp_fixup_sndbuf(struct sock *sk)
{
int sndmem = SKB_TRUESIZE(tcp_sk(sk)->rx_opt.mss_clamp + MAX_TCP_HEADER);
- if (sk->sk_sndbuf < 3 * sndmem) {
- sk->sk_sndbuf = 3 * sndmem;
- if (sk->sk_sndbuf > sysctl_tcp_wmem[2])
- sk->sk_sndbuf = sysctl_tcp_wmem[2];
- }
+ sndmem *= TCP_INIT_CWND;
+ if (sk->sk_sndbuf < sndmem)
+ sk->sk_sndbuf = min(sndmem, sysctl_tcp_wmem[2]);
}
/* 2. Tuning advertised window (window_clamp, rcv_ssthresh)
next reply other threads:[~2011-10-14 4:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-14 4:24 Eric Dumazet [this message]
2011-10-19 20:55 ` [PATCH net-next] tcp: use TCP_INIT_CWND in tcp_fixup_sndbuf() David Miller
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