From: Baruch Even <baruch@ev-en.org>
Date: Tue, 21 Mar 2006 06:22:20 +0000 (-0800)
Subject: [TCP] H-TCP: Use msecs_to_jiffies
X-Git-Tag: v2.6.17-rc1~1175^2~92
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c33ad6e476e4cdc245215f3eb5b3df353df1b370;p=linux-2.6

[TCP] H-TCP: Use msecs_to_jiffies

Use functions to calculate jiffies from milliseconds and not the old,
crude method of dividing HZ by a value. Ensures more accurate values
even in the face of strange HZ values.

Signed-off-By: Baruch Even <baruch@ev-en.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/tcp_htcp.c b/net/ipv4/tcp_htcp.c
index 128de4d7c0..fda2f87359 100644
--- a/net/ipv4/tcp_htcp.c
+++ b/net/ipv4/tcp_htcp.c
@@ -80,7 +80,7 @@ static inline void measure_rtt(struct sock *sk)
 	if (icsk->icsk_ca_state == TCP_CA_Open && tp->snd_ssthresh < 0xFFFF && ca->ccount > 3) {
 		if (ca->maxRTT < ca->minRTT)
 			ca->maxRTT = ca->minRTT;
-		if (ca->maxRTT < srtt && srtt <= ca->maxRTT+HZ/50)
+		if (ca->maxRTT < srtt && srtt <= ca->maxRTT+msecs_to_jiffies(20))
 			ca->maxRTT = srtt;
 	}
 }
@@ -135,7 +135,7 @@ static inline void htcp_beta_update(struct htcp *ca, u32 minRTT, u32 maxRTT)
 		}
 	}
 
-	if (ca->modeswitch && minRTT > max(HZ/100, 1) && maxRTT) {
+	if (ca->modeswitch && minRTT > msecs_to_jiffies(10) && maxRTT) {
 		ca->beta = (minRTT<<7)/maxRTT;
 		if (ca->beta < BETA_MIN)
 			ca->beta = BETA_MIN;