---

yaml --- r: 225212 b: refs/heads/master c: 356f039 h: refs/heads/master v: v3
git-mirror · Dec 21, 2010 · e7044b9 · e7044b9
1 parent 3355d9a
commit e7044b9
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Showing 3 changed files with 12 additions and 4 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: eda83e3b63e88351310c13c99178eb4634f137b2
+refs/heads/master: 356f039822b8d802138f7121c80d2a9286976dbd
diff --git a/trunk/include/net/tcp.h b/trunk/include/net/tcp.h
@@ -60,6 +60,9 @@ extern void tcp_time_wait(struct sock *sk, int state, int timeo);
  */
 #define MAX_TCP_WINDOW		32767U
 
+/* Offer an initial receive window of 10 mss. */
+#define TCP_DEFAULT_INIT_RCVWND	10
+
 /* Minimal accepted MSS. It is (60+60+8) - (20+20). */
 #define TCP_MIN_MSS		88U
 

diff --git a/trunk/net/ipv4/tcp_output.c b/trunk/net/ipv4/tcp_output.c
@@ -228,10 +228,15 @@ void tcp_select_initial_window(int __space, __u32 mss,
 		}
 	}
 
-	/* Set initial window to value enough for senders, following RFC5681. */
+	/* Set initial window to a value enough for senders starting with
+	 * initial congestion window of TCP_DEFAULT_INIT_RCVWND. Place
+	 * a limit on the initial window when mss is larger than 1460.
+	 */
 	if (mss > (1 << *rcv_wscale)) {
-		int init_cwnd = rfc3390_bytes_to_packets(mss);
-
+		int init_cwnd = TCP_DEFAULT_INIT_RCVWND;
+		if (mss > 1460)
+			init_cwnd =
+			max_t(u32, (1460 * TCP_DEFAULT_INIT_RCVWND) / mss, 2);
 		/* when initializing use the value from init_rcv_wnd
 		 * rather than the default from above
 		 */