diff options
Diffstat (limited to 'net/ipv4/tcp_vegas.c')
| -rw-r--r-- | net/ipv4/tcp_vegas.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c index be24d6ee34b..0e1a8c91f78 100644 --- a/net/ipv4/tcp_vegas.c +++ b/net/ipv4/tcp_vegas.c @@ -229,7 +229,8 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack, u32 in_flight) */ tcp_reno_cong_avoid(sk, ack, in_flight); } else { - u32 rtt, target_cwnd, diff; + u32 rtt, diff; + u64 target_cwnd; /* We have enough RTT samples, so, using the Vegas * algorithm, we determine if we should increase or @@ -252,8 +253,9 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack, u32 in_flight) * We keep it as a fixed point number with * V_PARAM_SHIFT bits to the right of the binary point. */ - target_cwnd = ((old_wnd * vegas->baseRTT) - << V_PARAM_SHIFT) / rtt; + target_cwnd = ((u64)old_wnd * vegas->baseRTT); + target_cwnd <<= V_PARAM_SHIFT; + do_div(target_cwnd, rtt); /* Calculate the difference between the window we had, * and the window we would like to have. This quantity @@ -279,7 +281,7 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack, u32 in_flight) * utilization. */ tp->snd_cwnd = min(tp->snd_cwnd, - (target_cwnd >> + ((u32)target_cwnd >> V_PARAM_SHIFT)+1); } else if (tp->snd_cwnd <= tp->snd_ssthresh) { |