diff --git a/net/core/dst.c b/net/core/dst.c
index 81ccf20e2826..a263309df115 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -98,8 +98,12 @@ void *dst_alloc(struct dst_ops *ops, struct net_device *dev,
 	struct dst_entry *dst;
 
 	if (ops->gc && dst_entries_get_fast(ops) > ops->gc_thresh) {
-		if (ops->gc(ops))
+		if (ops->gc(ops)) {
+			printk_ratelimited(KERN_NOTICE "Route cache is full: "
+					   "consider increasing sysctl "
+					   "net.ipv[4|6].route.max_size.\n");
 			return NULL;
+		}
 	}
 
 	dst = kmem_cache_alloc(ops->kmem_cachep, GFP_ATOMIC);