Slab defragmentation: Support inode defragmentation for sockets

Signed-off-by: Christoph Lameter <clameter@sgi.com>

---
 net/socket.c |    8 ++++++++
 1 file changed, 8 insertions(+)

Index: linux-2.6/net/socket.c
===================================================================
--- linux-2.6.orig/net/socket.c	2007-07-29 13:59:52.000000000 -0700
+++ linux-2.6/net/socket.c	2007-07-29 14:45:36.000000000 -0700
@@ -264,6 +264,12 @@ static void init_once(void *foo, struct 
 	inode_init_once(&ei->vfs_inode);
 }
 
+static void *sock_get_inodes(struct kmem_cache *s, int nr, void **v)
+{
+	return fs_get_inodes(s, nr, v,
+		offsetof(struct socket_alloc, vfs_inode));
+}
+
 static int init_inodecache(void)
 {
 	sock_inode_cachep = kmem_cache_create("sock_inode_cache",
@@ -275,6 +281,8 @@ static int init_inodecache(void)
 					      init_once);
 	if (sock_inode_cachep == NULL)
 		return -ENOMEM;
+	kmem_cache_setup_defrag(sock_inode_cachep,
+			sock_get_inodes, kick_inodes);
 	return 0;
 }