From: Stephen Hemminger <shemminger@linux-foundation.org>
Date: Mon, 12 Feb 2007 21:15:20 +0000 (-0800)
Subject: [TCP]: Use read mostly for CUBIC parameters.
X-Git-Tag: v2.6.21-rc1~274^2~1^2~2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=59758f44592b0930e83b190cf0206e59d616c983;p=linux-2.6

[TCP]: Use read mostly for CUBIC parameters.

These module parameters should be in the read mostly area to avoid
cache pollution.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/tcp_cubic.c b/net/ipv4/tcp_cubic.c
index 5ce6cd8568..9a582fb4ef 100644
--- a/net/ipv4/tcp_cubic.c
+++ b/net/ipv4/tcp_cubic.c
@@ -26,16 +26,16 @@
 					  */
 #define	BICTCP_HZ		10	/* BIC HZ 2^10 = 1024 */
 
-static int fast_convergence = 1;
-static int max_increment = 16;
-static int beta = 819;		/* = 819/1024 (BICTCP_BETA_SCALE) */
-static int initial_ssthresh = 100;
-static int bic_scale = 41;
-static int tcp_friendliness = 1;
-
-static u32 cube_rtt_scale;
-static u32 beta_scale;
-static u64 cube_factor;
+static int fast_convergence __read_mostly = 1;
+static int max_increment __read_mostly = 16;
+static int beta __read_mostly = 819;	/* = 819/1024 (BICTCP_BETA_SCALE) */
+static int initial_ssthresh __read_mostly = 100;
+static int bic_scale __read_mostly = 41;
+static int tcp_friendliness __read_mostly = 1;
+
+static u32 cube_rtt_scale __read_mostly;
+static u32 beta_scale __read_mostly;
+static u64 cube_factor __read_mostly;
 
 /* Note parameters that are used for precomputing scale factors are read-only */
 module_param(fast_convergence, int, 0644);