diff -r 797a7ded31cc -r 77bdf9b535b7 sys/netinet/siftr.c
--- a/sys/netinet/siftr.c	Sat Jun 19 12:34:27 2010 +1000
+++ b/sys/netinet/siftr.c	Sun Jun 20 02:57:56 2010 +1000
@@ -1204,7 +1204,7 @@
 	struct flow_hash_node *counter, *tmp_counter;
 	struct sbuf *s = NULL;
 	int i, key_index, ret, error = 0;
-	uint32_t total_skipped_pkts = 0;
+	uint32_t bytes_to_write, total_skipped_pkts = 0;
 	uint16_t lport, fport;
 	uint8_t *key, ipver;
 
@@ -1413,7 +1413,14 @@
 
 		sbuf_printf(s, "\n");
 		sbuf_finish(s);
-		alq_writen(siftr_alq, sbuf_data(s), sbuf_len(s), ALQ_WAITOK);
+
+		i = 0;
+		do {
+			bytes_to_write = min(SIFTR_ALQ_BUFLEN, sbuf_len(s)-i);
+			alq_writen(siftr_alq, sbuf_data(s)+i, bytes_to_write, ALQ_WAITOK);
+			i += bytes_to_write;
+		} while (i < sbuf_len(s));
+
 		alq_close(siftr_alq);
 		siftr_alq = NULL;
 	}