From 4b79f0af48d529a360d3529def01835dc5d45fe1 Mon Sep 17 00:00:00 2001 From: Ian McDonald Date: Sun, 23 Jul 2006 23:33:28 -0700 Subject: [DCCP]: Fix default sequence window size When using the default sequence window size (100) I got the following in my logs: Jun 22 14:24:09 localhost kernel: [ 1492.114775] DCCP: Step 6 failed for DATA packet, (LSWL(6279674225) <= P.seqno(6279674749) <= S.SWH(6279674324)) and (P.ackno doesn't exist or LAWL(18798206530) <= P.ackno(1125899906842620) <= S.AWH(18798206548), sending SYNC... Jun 22 14:24:09 localhost kernel: [ 1492.115147] DCCP: Step 6 failed for DATA packet, (LSWL(6279674225) <= P.seqno(6279674750) <= S.SWH(6279674324)) and (P.ackno doesn't exist or LAWL(18798206530) <= P.ackno(1125899906842620) <= S.AWH(18798206549), sending SYNC... I went to alter the default sysctl and it didn't take for new sockets. Below patch fixes this. I think the default is too low but it is what the DCCP spec specifies. As a side effect of this my rx speed using iperf goes from about 2.8 Mbits/sec to 3.5. This is still far too slow but it is a step in the right direction. Compile tested only for IPv6 but not particularly complex change. Signed off by: Ian McDonald Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- net/dccp/options.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/dccp/options.c') diff --git a/net/dccp/options.c b/net/dccp/options.c index c3cda1e39aa..daf72bb671f 100644 --- a/net/dccp/options.c +++ b/net/dccp/options.c @@ -29,6 +29,8 @@ int dccp_feat_default_ack_ratio = DCCPF_INITIAL_ACK_RATIO; int dccp_feat_default_send_ack_vector = DCCPF_INITIAL_SEND_ACK_VECTOR; int dccp_feat_default_send_ndp_count = DCCPF_INITIAL_SEND_NDP_COUNT; +EXPORT_SYMBOL_GPL(dccp_feat_default_sequence_window); + void dccp_minisock_init(struct dccp_minisock *dmsk) { dmsk->dccpms_sequence_window = dccp_feat_default_sequence_window; -- cgit v1.2.3-18-g5258