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authorIan McDonald <ian.mcdonald@jandi.co.nz>2006-07-24 06:33:28 (GMT)
committerDavid S. Miller <davem@sunset.davemloft.net>2006-07-24 19:44:21 (GMT)
commit4b79f0af48d529a360d3529def01835dc5d45fe1 (patch)
tree0d5013514dd5f19a09f9c2d32dee2ba0f4f4827a /net/dccp/ipv4.c
parent8fdf679fdb00f588b65abb9c775c178098a05aeb (diff)
downloadlinux-4b79f0af48d529a360d3529def01835dc5d45fe1.tar.xz
[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 <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp/ipv4.c')
-rw-r--r--net/dccp/ipv4.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index c3073e7..7f56f7e 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -504,8 +504,7 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
ireq = inet_rsk(req);
ireq->loc_addr = daddr;
ireq->rmt_addr = saddr;
- req->rcv_wnd = 100; /* Fake, option parsing will get the
- right value */
+ req->rcv_wnd = dccp_feat_default_sequence_window;
ireq->opt = NULL;
/*