mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-21 06:33:41 +00:00
62 lines
1.9 KiB
Diff
62 lines
1.9 KiB
Diff
From: Alexander Duyck <alexander.h.duyck@redhat.com>
|
|
Date: Thu, 22 Jan 2015 15:51:20 -0800
|
|
Subject: [PATCH] fib_trie: Fall back to slen update on inflate/halve failure
|
|
|
|
This change corrects an issue where if inflate or halve fails we were
|
|
exiting the resize function without at least updating the slen for the
|
|
node. To correct this I have moved the update of max_size into the while
|
|
loop so that it is only decremented on a successful call to either inflate
|
|
or halve.
|
|
|
|
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
|
|
@@ -752,7 +752,7 @@ static void resize(struct trie *t, struc
|
|
{
|
|
struct tnode *tp = node_parent(tn), *n = NULL;
|
|
struct tnode __rcu **cptr;
|
|
- int max_work;
|
|
+ int max_work = MAX_WORK;
|
|
|
|
pr_debug("In tnode_resize %p inflate_threshold=%d threshold=%d\n",
|
|
tn, inflate_threshold, halve_threshold);
|
|
@@ -775,8 +775,7 @@ static void resize(struct trie *t, struc
|
|
/* Double as long as the resulting node has a number of
|
|
* nonempty nodes that are above the threshold.
|
|
*/
|
|
- max_work = MAX_WORK;
|
|
- while (should_inflate(tp, tn) && max_work--) {
|
|
+ while (should_inflate(tp, tn) && max_work) {
|
|
if (inflate(t, tn)) {
|
|
#ifdef CONFIG_IP_FIB_TRIE_STATS
|
|
this_cpu_inc(t->stats->resize_node_skipped);
|
|
@@ -784,6 +783,7 @@ static void resize(struct trie *t, struc
|
|
break;
|
|
}
|
|
|
|
+ max_work--;
|
|
tn = rtnl_dereference(*cptr);
|
|
}
|
|
|
|
@@ -794,8 +794,7 @@ static void resize(struct trie *t, struc
|
|
/* Halve as long as the number of empty children in this
|
|
* node is above threshold.
|
|
*/
|
|
- max_work = MAX_WORK;
|
|
- while (should_halve(tp, tn) && max_work--) {
|
|
+ while (should_halve(tp, tn) && max_work) {
|
|
if (halve(t, tn)) {
|
|
#ifdef CONFIG_IP_FIB_TRIE_STATS
|
|
this_cpu_inc(t->stats->resize_node_skipped);
|
|
@@ -803,6 +802,7 @@ static void resize(struct trie *t, struc
|
|
break;
|
|
}
|
|
|
|
+ max_work--;
|
|
tn = rtnl_dereference(*cptr);
|
|
}
|
|
|