---

yaml --- r: 215175 b: refs/heads/master c: 10da66f h: refs/heads/master i: 215173: 5ef4f70 215171: d3b24ed 215167: 0d8c891 v: v3
git-mirror · Oct 16, 2010 · 6c73f6a · 6c73f6a
1 parent 0fb34b3
commit 6c73f6a
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Showing 3 changed files with 12 additions and 10 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 874ffa8f72444d6253d2669fed304875c128f86b
+refs/heads/master: 10da66f7552b3c7966c2f4f1f72009fb0b5539ec
diff --git a/trunk/net/ipv4/fib_frontend.c b/trunk/net/ipv4/fib_frontend.c
@@ -1016,16 +1016,15 @@ static struct notifier_block fib_netdev_notifier = {
 static int __net_init ip_fib_net_init(struct net *net)
 {
 	int err;
-	unsigned int i;
+	size_t size = sizeof(struct hlist_head) * FIB_TABLE_HASHSZ;
+
+	/* Avoid false sharing : Use at least a full cache line */
+	size = max_t(size_t, size, L1_CACHE_BYTES);
 
-	net->ipv4.fib_table_hash = kzalloc(
-			sizeof(struct hlist_head)*FIB_TABLE_HASHSZ, GFP_KERNEL);
+	net->ipv4.fib_table_hash = kzalloc(size, GFP_KERNEL);
 	if (net->ipv4.fib_table_hash == NULL)
 		return -ENOMEM;
 
-	for (i = 0; i < FIB_TABLE_HASHSZ; i++)
-		INIT_HLIST_HEAD(&net->ipv4.fib_table_hash[i]);
-
 	err = fib4_rules_init(net);
 	if (err < 0)
 		goto fail;

diff --git a/trunk/net/ipv6/ip6_fib.c b/trunk/net/ipv6/ip6_fib.c
@@ -1500,15 +1500,18 @@ static void fib6_gc_timer_cb(unsigned long arg)
 
 static int __net_init fib6_net_init(struct net *net)
 {
+	size_t size = sizeof(struct hlist_head) * FIB6_TABLE_HASHSZ;
+
 	setup_timer(&net->ipv6.ip6_fib_timer, fib6_gc_timer_cb, (unsigned long)net);
 
 	net->ipv6.rt6_stats = kzalloc(sizeof(*net->ipv6.rt6_stats), GFP_KERNEL);
 	if (!net->ipv6.rt6_stats)
 		goto out_timer;
 
-	net->ipv6.fib_table_hash = kcalloc(FIB6_TABLE_HASHSZ,
-					   sizeof(*net->ipv6.fib_table_hash),
-					   GFP_KERNEL);
+	/* Avoid false sharing : Use at least a full cache line */
+	size = max_t(size_t, size, L1_CACHE_BYTES);
+
+	net->ipv6.fib_table_hash = kzalloc(size, GFP_KERNEL);
 	if (!net->ipv6.fib_table_hash)
 		goto out_rt6_stats;