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authorOctavian Purdila <opurdila@ixiacom.com>2009-12-26 11:51:05 +0000
committerDavid S. Miller <davem@davemloft.net>2009-12-26 20:45:32 -0800
commit52d58aef5ee460fedd7f250f05e79081019f2c79 (patch)
tree9c8d2bf8374570038820a47325a2305bcb83111d /net/llc/llc_core.c
parent6d2e3ea284463d5ab34e9cf2a41d0b8627b95d02 (diff)
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llc: replace the socket list with a local address based hash
For the cases where a lot of interfaces are used in conjunction with a lot of LLC sockets bound to the same SAP, the iteration of the socket list becomes prohibitively expensive. Replacing the list with a a local address based hash significantly improves the bind and listener lookup operations as well as the datagram delivery. Connected sockets delivery is also improved, but this patch does not address the case where we have lots of sockets with the same local address connected to different remote addresses. In order to keep the socket sanity checks alive and fast a socket counter was added to the SAP structure. Signed-off-by: Octavian Purdila <opurdila@ixiacom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/llc/llc_core.c')
-rw-r--r--net/llc/llc_core.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/llc/llc_core.c b/net/llc/llc_core.c
index 5276b9722077..0c9ef8bc7655 100644
--- a/net/llc/llc_core.c
+++ b/net/llc/llc_core.c
@@ -33,12 +33,14 @@ DEFINE_RWLOCK(llc_sap_list_lock);
static struct llc_sap *llc_sap_alloc(void)
{
struct llc_sap *sap = kzalloc(sizeof(*sap), GFP_ATOMIC);
+ int i;
if (sap) {
/* sap->laddr.mac - leave as a null, it's filled by bind */
sap->state = LLC_SAP_STATE_ACTIVE;
spin_lock_init(&sap->sk_lock);
- INIT_HLIST_NULLS_HEAD(&sap->sk_list, 0);
+ for (i = 0; i < LLC_SK_LADDR_HASH_ENTRIES; i++)
+ INIT_HLIST_NULLS_HEAD(&sap->sk_laddr_hash[i], i);
atomic_set(&sap->refcnt, 1);
}
return sap;
@@ -143,7 +145,7 @@ out:
*/
void llc_sap_close(struct llc_sap *sap)
{
- WARN_ON(!hlist_nulls_empty(&sap->sk_list));
+ WARN_ON(sap->sk_count);
llc_del_sap(sap);
kfree(sap);
}