From: Ilpo Järvinen Date: Wed, 5 Dec 2007 10:21:35 +0000 (-0800) Subject: [TCP]: Move prior_in_flight collect to more robust place X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=52d3408150858a301a84bcbfe2f323d90d71d2ce;p=linux-beck.git [TCP]: Move prior_in_flight collect to more robust place The previous location is after sacktag processing, which affects counters tcp_packets_in_flight depends on. This may manifest as wrong behavior if new SACK blocks are present and all is clear for call to tcp_cong_avoid, which in the case of tcp_reno_cong_avoid bails out early because it thinks that TCP is not limited by cwnd. Signed-off-by: Ilpo Järvinen Signed-off-by: David S. Miller --- diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 094f8fafaf53..b9e429d2d1de 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -3065,6 +3065,7 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag) } prior_fackets = tp->fackets_out; + prior_in_flight = tcp_packets_in_flight(tp); if (!(flag&FLAG_SLOWPATH) && after(ack, prior_snd_una)) { /* Window is constant, pure forward advance. @@ -3104,8 +3105,6 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag) if (!prior_packets) goto no_queue; - prior_in_flight = tcp_packets_in_flight(tp); - /* See if we can take anything off of the retransmit queue. */ flag |= tcp_clean_rtx_queue(sk, &seq_rtt, prior_fackets);