Commit 387a5487 authored by Stephen Hemminger's avatar Stephen Hemminger Committed by David S. Miller
Browse files

ipv4: fib_trie leaf free optimization 



Avoid unneeded test in the case where object to be freed
has to be a leaf. Don't need to use the generic tnode_free()
function, instead just setup leaf to be freed.

Signed-off-by: default avatarStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ef3660ce

net/ipv4/fib_trie.c

+11 −8
Original line number Diff line number Diff line
@@ -163,7 +163,6 @@ static void tnode_put_child_reorg(struct tnode *tn, int i, struct node *n, 
static struct node *resize(struct trie *t, struct tnode *tn);

static struct tnode *inflate(struct trie *t, struct tnode *tn);

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;
@@ -337,6 +336,11 @@ static void __leaf_free_rcu(struct rcu_head *head) 
	kmem_cache_free(trie_leaf_kmem, l);

}



static inline void free_leaf(struct leaf *l)

{

	call_rcu_bh(&l->rcu, __leaf_free_rcu);

}



static void __leaf_info_free_rcu(struct rcu_head *head)

{

	kfree(container_of(head, struct leaf_info, rcu));
@@ -377,10 +381,9 @@ static void __tnode_free_rcu(struct rcu_head *head) 


static inline void tnode_free(struct tnode *tn)

{

	if (IS_LEAF(tn)) {

		struct leaf *l = (struct leaf *) tn;

		call_rcu_bh(&l->rcu, __leaf_free_rcu);

	} else

	if (IS_LEAF(tn))

		free_leaf((struct leaf *) tn);

	else

		call_rcu(&tn->rcu, __tnode_free_rcu);

}
@@ -1091,7 +1094,7 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen) 
	li = leaf_info_new(plen);



	if (!li) {

		tnode_free((struct tnode *) l);

		free_leaf(l);

		return NULL;

	}
@@ -1127,7 +1130,7 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen) 


		if (!tn) {

			free_leaf_info(li);

			tnode_free((struct tnode *) l);

			free_leaf(l);

			return NULL;

		}
@@ -1583,7 +1586,7 @@ static void trie_leaf_remove(struct trie *t, struct leaf *l) 
	} else

		rcu_assign_pointer(t->trie, NULL);



	tnode_free((struct tnode *) l);

	free_leaf(l);

}



/*

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