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[IPV4] fib_trie: put leaf nodes in a slab cache 

This improves locality for operations that touch all the leaves.  Save
space since these entries don't need to be hardware cache aligned.

Signed-off-by: Stephen Hemminger <stephen.hemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2008-01-22 21:51:50 -08:00 committed by David S. Miller
parent a1f6f5a768
commit bc3c8c1e02
1 changed files with 10 additions and 3 deletions
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13
net/ipv4/fib_trie.c
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@ -162,6 +162,7 @@ static struct tnode *halve(struct trie *t, struct tnode *tn);
static void tnode_free(struct tnode *tn);
static struct kmem_cache *fn_alias_kmem __read_mostly;
static struct kmem_cache *trie_leaf_kmem __read_mostly;
static inline struct tnode *node_parent(struct node *node)
{
@ -325,7 +326,8 @@ static inline void alias_free_mem_rcu(struct fib_alias *fa)
static void __leaf_free_rcu(struct rcu_head *head)
{
kfree(container_of(head, struct leaf, rcu));
struct leaf *l = container_of(head, struct leaf, rcu);
kmem_cache_free(trie_leaf_kmem, l);
}
static void __leaf_info_free_rcu(struct rcu_head *head)
@ -375,7 +377,7 @@ static inline void tnode_free(struct tnode *tn)
static struct leaf *leaf_new(void)
{
struct leaf *l = kmalloc(sizeof(struct leaf), GFP_KERNEL);
struct leaf *l = kmem_cache_alloc(trie_leaf_kmem, GFP_KERNEL);
if (l) {
l->parent = T_LEAF;
INIT_HLIST_HEAD(&l->list);
@ -1938,7 +1940,12 @@ out:
void __init fib_hash_init(void)
{
fn_alias_kmem = kmem_cache_create("ip_fib_alias", sizeof(struct fib_alias),
0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
0, SLAB_PANIC, NULL);
trie_leaf_kmem = kmem_cache_create("ip_fib_trie",
max(sizeof(struct leaf),
sizeof(struct leaf_info)),
0, SLAB_PANIC, NULL);
}