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@xxxxxxxxxxxx>
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxx>
------------------------------------------------------------------------------
ccid2.c | 7 +++++--
ccid2.h | 2 +-
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
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;
-
To unsubscribe from this list: send the line "unsubscribe dccp" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
