From ac11ba753f3aa839292c1a3b6c971c637ad2e839 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ilpo=20J=C3=A4rvinen?= Date: Sat, 28 Feb 2009 04:44:27 +0000 Subject: [PATCH] tcp: don't backtrack to sacked skbs MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Backtracking to sacked skbs is a horrible performance killer since the hint cannot be advanced successfully past them... ...And it's totally unnecessary too. In theory this is 2.6.27..28 regression but I doubt anybody can make .28 to have worse performance because of other TCP improvements. Signed-off-by: Ilpo Järvinen Signed-off-by: David S. Miller --- net/ipv4/tcp_output.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index f6f61b3..2471cd4 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2065,7 +2065,7 @@ begin_fwd: goto begin_fwd; } else if (!(sacked & TCPCB_LOST)) { - if (hole == NULL && !(sacked & TCPCB_SACKED_RETRANS)) + if (hole == NULL && !(sacked & (TCPCB_SACKED_RETRANS|TCPCB_SACKED_ACKED))) hole = skb; continue; -- 2.7.4