summaryrefslogtreecommitdiff
path: root/net/ipv6/xfrm6_policy.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv6/xfrm6_policy.c')
-rw-r--r--net/ipv6/xfrm6_policy.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index 4acc308eac7f..611cffcf554f 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -323,6 +323,7 @@ static struct ctl_table_header *sysctl_hdr;
int __init xfrm6_init(void)
{
int ret;
+ unsigned int gc_thresh;
ret = xfrm6_policy_init();
if (ret)
@@ -331,6 +332,20 @@ int __init xfrm6_init(void)
ret = xfrm6_state_init();
if (ret)
goto out_policy;
+ /*
+ * We need a good default value for the xfrm6 gc threshold.
+ * In ipv4 we set it to the route hash table size * 8, which
+ * is half the size of the maximaum route cache for ipv4. It
+ * would be good to do the same thing for v6, except the table is
+ * constructed differently here. Here each table for a net namespace
+ * can have FIB_TABLE_HASHSZ entries, so lets go with the same
+ * computation that we used for ipv4 here. Also, lets keep the initial
+ * gc_thresh to a minimum of 1024, since, the ipv6 route cache defaults
+ * to that as a minimum as well
+ */
+ gc_thresh = FIB6_TABLE_HASHSZ * 8;
+ xfrm6_dst_ops.gc_thresh = (gc_thresh < 1024) ? 1024 : gc_thresh;
+
sysctl_hdr = register_net_sysctl_table(&init_net, net_ipv6_ctl_path,
xfrm6_policy_table);
out: