[NET]: use __read_mostly on kmem_cache_t , DEFINE_SNMP_STAT pointers

This patch puts mostly read only data in the right section
(read_mostly), to help sharing of these data between CPUS without
memory ping pongs.

On one of my production machine, tcp_statistics was sitting in a
heavily modified cache line, so *every* SNMP update had to force a
reload.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 6 insertions, 6 deletions

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 554f224c0445..fe1a73ce6cff 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -28,13 +28,13 @@
 #include <linux/workqueue.h>
 #include <linux/sunrpc/rpc_pipe_fs.h>
 
-static struct vfsmount *rpc_mount;
+static struct vfsmount *rpc_mount __read_mostly;
 static int rpc_mount_count;
 
 static struct file_system_type rpc_pipe_fs_type;
 
 
-static kmem_cache_t *rpc_inode_cachep;
+static kmem_cache_t *rpc_inode_cachep __read_mostly;
 
 #define RPC_UPCALL_TIMEOUT (30*HZ)
 
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 2d9eb7fbd521..f3104035e35d 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -34,10 +34,10 @@ static int			rpc_task_id;
 #define RPC_BUFFER_MAXSIZE      (2048)
 #define RPC_BUFFER_POOLSIZE     (8)
 #define RPC_TASK_POOLSIZE       (8)
-static kmem_cache_t     *rpc_task_slabp;
-static kmem_cache_t     *rpc_buffer_slabp;
-static mempool_t        *rpc_task_mempool;
-static mempool_t        *rpc_buffer_mempool;
+static kmem_cache_t     *rpc_task_slabp __read_mostly;
+static kmem_cache_t     *rpc_buffer_slabp __read_mostly;
+static mempool_t        *rpc_task_mempool __read_mostly;
+static mempool_t        *rpc_buffer_mempool __read_mostly;
 
 static void                     __rpc_default_timer(struct rpc_task *task);
 static void                     rpciod_killall(void);