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[IPV4]: Handle large allocations in fib_trie 

Inflating a node a couple of times makes it exceed the 128k kmalloc limit.
Use __get_free_pages for allocations > PAGE_SIZE, as in fib_hash.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Acked-by: Robert Olsson <Robert.Olsson@data.slu.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2005-07-05 14:44:55 -07:00 committed by David S. Miller
parent 93e266f600
commit f0e36f8cee
1 changed files with 23 additions and 2 deletions
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25
net/ipv4/fib_trie.c
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@ -358,11 +358,32 @@ static inline void free_leaf_info(struct leaf_info *li)
kfree(li);
}
static struct tnode *tnode_alloc(unsigned int size)
{
if (size <= PAGE_SIZE) {
return kmalloc(size, GFP_KERNEL);
} else {
return (struct tnode *)
__get_free_pages(GFP_KERNEL, get_order(size));
}
}
static void __tnode_free(struct tnode *tn)
{
unsigned int size = sizeof(struct tnode) +
(1<<tn->bits) * sizeof(struct node *);
if (size <= PAGE_SIZE)
kfree(tn);
else
free_pages((unsigned long)tn, get_order(size));
}
static struct tnode* tnode_new(t_key key, int pos, int bits)
{
int nchildren = 1<<bits;
int sz = sizeof(struct tnode) + nchildren * sizeof(struct node *);
struct tnode *tn = kmalloc(sz, GFP_KERNEL);
struct tnode *tn = tnode_alloc(sz);
if(tn) {
memset(tn, 0, sz);
@ -390,7 +411,7 @@ static void tnode_free(struct tnode *tn)
printk("FL %p \n", tn);
}
else if(IS_TNODE(tn)) {
kfree(tn);
__tnode_free(tn);
if(trie_debug > 0 )
printk("FT %p \n", tn);
}