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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/net/ipv4/tcp_scalable.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /* Tom Kelly's Scalable TCP
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  *
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  * See http://www.deneholme.net/tom/scalable/
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@@ -9,10 +10,9 @@
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 #include <net/tcp.h>
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 /* These factors derived from the recommended values in the aer:
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- * .01 and and 7/8. We use 50 instead of 100 to account for
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- * delayed ack.
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+ * .01 and 7/8.
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  */
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-#define TCP_SCALABLE_AI_CNT	50U
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+#define TCP_SCALABLE_AI_CNT	100U
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 #define TCP_SCALABLE_MD_SCALE	3
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 static void tcp_scalable_cong_avoid(struct sock *sk, u32 ack, u32 acked)
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@@ -22,11 +22,13 @@
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 	if (!tcp_is_cwnd_limited(sk))
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 		return;
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-	if (tcp_in_slow_start(tp))
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-		tcp_slow_start(tp, acked);
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-	else
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-		tcp_cong_avoid_ai(tp, min(tp->snd_cwnd, TCP_SCALABLE_AI_CNT),
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-				  1);
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+	if (tcp_in_slow_start(tp)) {
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+		acked = tcp_slow_start(tp, acked);
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+		if (!acked)
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+			return;
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+	}
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+	tcp_cong_avoid_ai(tp, min(tp->snd_cwnd, TCP_SCALABLE_AI_CNT),
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+			  acked);
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 }
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 static u32 tcp_scalable_ssthresh(struct sock *sk)