diff -ur ipvs-1.0.6/ipvs/ip_vs_core.c ipvs-1.0.6-debug/ipvs/ip_vs_core.c
--- ipvs-1.0.6/ipvs/ip_vs_core.c	Sat Aug 10 04:32:35 2002
+++ ipvs-1.0.6-debug/ipvs/ip_vs_core.c	Wed Oct  2 01:55:03 2002
@@ -83,6 +83,65 @@
 	}
 }
 
+static void ip_vs_debug_packet(struct sk_buff *skb, char *msg)
+{
+	struct iphdr *iph = skb->nh.iph;
+	int len = skb->len;
+	union ip_vs_tphdr h;
+	u16 s1, s2;
+
+	/* Many printk not good on SMP */
+	printk("%s:", msg);
+
+loop:
+	if (len - sizeof(struct iphdr) < 0) goto end;
+	printk(" len=%d, IP(%u.%u.%u.%u->%u.%u.%u.%u, ihl=%d)",
+		len, NIPQUAD(iph->saddr), NIPQUAD(iph->daddr), iph->ihl);
+
+	h.raw = (char *) iph + iph->ihl*4;
+	len -= iph->ihl * 4;
+
+	switch (iph->protocol) {
+	case IPPROTO_TCP:
+		if (len - 4 < 0) goto end;
+		s1 = h.portp[0];
+		s2 = h.portp[1];
+		if (len - sizeof(struct tcphdr) < 0)
+			printk(" %s(%u->%u,XXX)",
+				ip_vs_proto_name(iph->protocol),
+				ntohs(s1), ntohs(s2));
+		else
+			printk(" %s(%u->%u, doff=%d, %s%s%s%s)",
+				ip_vs_proto_name(iph->protocol),
+				ntohs(s1), ntohs(s2), h.th->doff,
+				h.th->syn? "S":"s",
+				h.th->ack? "A":"a",
+				h.th->fin? "F":"f",
+				h.th->rst? "R":"r");
+		break;
+	case IPPROTO_UDP:
+		if (len - 4 < 0) goto end;
+		s1 = h.portp[0];
+		s2 = h.portp[1];
+		printk(" %s(%u->%u)", ip_vs_proto_name(iph->protocol),
+			ntohs(s1), ntohs(s2));
+		break;
+	case IPPROTO_ICMP:
+		if (len - 2 < 0) goto end;
+		printk(" %s(t=%u,c=%u)", ip_vs_proto_name(iph->protocol),
+			h.icmph->type, h.icmph->code);
+		len -= sizeof(struct icmphdr);
+		iph = (struct iphdr *) (h.raw + sizeof(struct icmphdr));
+		goto loop;
+	default:
+		printk(" proto %u", iph->protocol);
+		break;
+	}
+
+end:
+	printk("\n");
+}
+
 
 static inline void
 ip_vs_in_stats(struct ip_vs_conn *cp, struct sk_buff *skb)
@@ -908,8 +967,10 @@
 	/* Ensure the checksum is correct */
 	if (ip_compute_csum((unsigned char *) icmph, len)) {
 		/* Failed checksum! */
-		IP_VS_ERR_RL("incoming ICMP: failed checksum from "
-			     "%d.%d.%d.%d!\n", NIPQUAD(iph->saddr));
+		if (net_ratelimit()) {
+			ip_vs_debug_packet(skb, KERN_ERR
+				"IPVS: incoming ICMP: failed checksum");
+		}
 		return NF_DROP;
 	}