mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 08:21:14 +00:00
35 lines
1023 B
Diff
35 lines
1023 B
Diff
From: Alexander Duyck <alexander.h.duyck@redhat.com>
|
|
Date: Thu, 22 Jan 2015 15:51:33 -0800
|
|
Subject: [PATCH] fib_trie: Use empty_children instead of counting empty nodes
|
|
in stats collection
|
|
|
|
It doesn't make much sense to count the pointers ourselves when
|
|
empty_children already has a count for the number of NULL pointers stored
|
|
in the tnode. As such save ourselves the cycles and just use
|
|
empty_children.
|
|
|
|
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
|
|
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
---
|
|
|
|
--- a/net/ipv4/fib_trie.c
|
|
+++ b/net/ipv4/fib_trie.c
|
|
@@ -1954,16 +1954,10 @@ static void trie_collect_stats(struct tr
|
|
hlist_for_each_entry_rcu(li, &n->list, hlist)
|
|
++s->prefixes;
|
|
} else {
|
|
- unsigned long i;
|
|
-
|
|
s->tnodes++;
|
|
if (n->bits < MAX_STAT_DEPTH)
|
|
s->nodesizes[n->bits]++;
|
|
-
|
|
- for (i = tnode_child_length(n); i--;) {
|
|
- if (!rcu_access_pointer(n->child[i]))
|
|
- s->nullpointers++;
|
|
- }
|
|
+ s->nullpointers += n->empty_children;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|