From dd24c00191d5e4a1ae896aafe33c6b8095ab4bd1 Mon Sep 17 00:00:00 2001
From: Eric Dumazet <dada1@cosmosbay.com>
Date: Tue, 25 Nov 2008 21:17:14 -0800
Subject: net: Use a percpu_counter for orphan_count
Instead of using one atomic_t per protocol, use a percpu_counter
for "orphan_count", to reduce cache line contention on
heavy duty network servers.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/net/sock.h | 2 +-
include/net/tcp.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
(limited to 'include')
diff --git a/include/net/sock.h b/include/net/sock.h
index a2a3890959c..5a3a151bd73 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -666,7 +666,7 @@ struct proto {
unsigned int obj_size;
int slab_flags;
- atomic_t *orphan_count;
+ struct percpu_counter *orphan_count;
struct request_sock_ops *rsk_prot;
struct timewait_sock_ops *twsk_prot;
diff --git a/include/net/tcp.h b/include/net/tcp.h
index cbca3b8a133..de1e91d959b 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -46,7 +46,7 @@
extern struct inet_hashinfo tcp_hashinfo;
-extern atomic_t tcp_orphan_count;
+extern struct percpu_counter tcp_orphan_count;
extern void tcp_time_wait(struct sock *sk, int state, int timeo);
#define MAX_TCP_HEADER (128 + MAX_HEADER)
--
cgit