netdev - [PATCH] net: Use a percpu_counter for orphan

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Message-ID: <492C85AA.9080205@cosmosbay.com>
Date:	Wed, 26 Nov 2008 00:09:30 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	"David S. Miller" <davem@...emloft.net>
CC:	Linux Netdev List <netdev@...r.kernel.org>
Subject: [PATCH] net: Use a percpu_counter for orphan_count

Hi David

Here is the second patch, after one for sockets_allocated

Thank you

[PATCH] 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@...mosbay.com>
---
 include/net/sock.h              |    2 +-
 include/net/tcp.h               |    2 +-
 net/dccp/dccp.h                 |    2 +-
 net/dccp/proto.c                |   16 ++++++++++------
 net/ipv4/inet_connection_sock.c |    4 ++--
 net/ipv4/proc.c                 |    2 +-
 net/ipv4/tcp.c                  |   12 +++++++-----
 net/ipv4/tcp_timer.c            |    2 +-
 8 files changed, 24 insertions(+), 18 deletions(-)

View attachment "orphan.patch" of type "text/plain" (5848 bytes)