Commit d458c25c authored by Andrea Bittau's avatar Andrea Bittau Committed by David S. Miller
Browse files

[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: default avatarAndrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 29651cda

net/dccp/ccids/ccid2.c

+5 −2
Original line number Diff line number Diff line
@@ -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... */

net/dccp/ccids/ccid2.h

+1 −1
Original line number Diff line number Diff line
@@ -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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