diff options
Diffstat (limited to 'target/linux/generic/patches-3.18/080-21-fib_trie-Fall-back-to-slen-update-on-inflate-halve-f.patch')
| -rw-r--r-- | target/linux/generic/patches-3.18/080-21-fib_trie-Fall-back-to-slen-update-on-inflate-halve-f.patch | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.18/080-21-fib_trie-Fall-back-to-slen-update-on-inflate-halve-f.patch b/target/linux/generic/patches-3.18/080-21-fib_trie-Fall-back-to-slen-update-on-inflate-halve-f.patch new file mode 100644 index 0000000..058b33b --- /dev/null +++ b/target/linux/generic/patches-3.18/080-21-fib_trie-Fall-back-to-slen-update-on-inflate-halve-f.patch @@ -0,0 +1,61 @@ +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); + } + |