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authorAndrea Bittau <a.bittau@cs.ucl.ac.uk>2006-09-19 13:07:20 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-09-22 15:19:11 -0700
commitd458c25ce24ce00ea547e9976e293e7835416253 (patch)
treeb15e036537270aa0f70c390556aaa483702fd326 /net/dccp
parent29651cda97b0a9e4ac0fbeb5ea731a9909f0f128 (diff)
downloadop-kernel-dev-d458c25ce24ce00ea547e9976e293e7835416253.zip
op-kernel-dev-d458c25ce24ce00ea547e9976e293e7835416253.tar.gz
[DCCP] CCID2: Initialize ssthresh to infinity
Initialize the slow-start threshold to infinity. This way, upon connection initiation, slow-start will be exited only upon a packet loss. This patch will allow connections to quickly gain speed. Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp')
-rw-r--r--net/dccp/ccids/ccid2.c7
-rw-r--r--net/dccp/ccids/ccid2.h2
2 files changed, 6 insertions, 3 deletions
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index 54a6b7e..699a566 100644
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -678,9 +678,12 @@ static int ccid2_hc_tx_init(struct ccid *ccid, struct sock *sk)
int seqcount = ccid2_seq_len;
int i;
- /* XXX init variables with proper values */
hctx->ccid2hctx_cwnd = 1;
- hctx->ccid2hctx_ssthresh = 10;
+ /* Initialize ssthresh to infinity. This means that we will exit the
+ * initial slow-start after the first packet loss. This is what we
+ * want.
+ */
+ hctx->ccid2hctx_ssthresh = ~0;
hctx->ccid2hctx_numdupack = 3;
/* XXX init ~ to window size... */
diff --git a/net/dccp/ccids/ccid2.h b/net/dccp/ccids/ccid2.h
index 451a874..b4cc6c0 100644
--- a/net/dccp/ccids/ccid2.h
+++ b/net/dccp/ccids/ccid2.h
@@ -50,7 +50,7 @@ struct ccid2_hc_tx_sock {
int ccid2hctx_cwnd;
int ccid2hctx_ssacks;
int ccid2hctx_acks;
- int ccid2hctx_ssthresh;
+ unsigned int ccid2hctx_ssthresh;
int ccid2hctx_pipe;
int ccid2hctx_numdupack;
struct ccid2_seq *ccid2hctx_seqbuf;
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