Index: drbd_main.c
===================================================================
--- drbd_main.c	(revision 3504)
+++ drbd_main.c	(working copy)
@@ -131,7 +131,12 @@
 			// 0 = none
 			// 1 = summary (trace 'interesting' packets in summary fmt)
 			// 2 = verbose (trace all packets in full format)
+int dump_packet_devs = 0;// bitmap of drbd devices to have tracing
+			// enabled
+
 module_param(dump_packets,int,0644);
+module_param(dump_packet_devs,int,0644);
+
 #endif
 
 // devfs name
@@ -306,11 +311,21 @@
 	hlist_for_each_entry(i, n, slot, colision) {
 		if (i==req) {
 			D_ASSERT(drbd_req_get_sector(i) == sector);
+			if (drbd_req_get_sector(i) != sector) {
+				ERR("tl_verify: found req %p but it has wrong sector (%llx versus %llx)\n",
+				    req, (long long)drbd_req_get_sector(i), (long long)sector);
+			}
 			rv=1;
 			break;
 		}
 	}
 
+	// Really better find it!
+	if (!rv) {
+		ERR("tl_verify: failed to find req %p, sector %llx in list\n", 
+		    req, (long long)sector);
+	}
+
 	spin_unlock_irq(&mdev->tl_lock);
 
 	return rv;
@@ -1295,6 +1310,8 @@
 
 	down(&mdev->data.mutex);
 
+	dump_packet(mdev,mdev->data.socket,0,(void*)&h, __FILE__, __LINE__);
+
 	ok = ( sizeof(h) == drbd_send(mdev,mdev->data.socket,&h,sizeof(h),0) );
 	ok = ok && ( size == drbd_send(mdev,mdev->data.socket,data,size,0) );
 
@@ -1713,7 +1730,6 @@
 	unsigned int dp_flags=0;
 
 	down(&mdev->data.mutex);
-
 	p.head.magic   = BE_DRBD_MAGIC;
 	p.head.command = cpu_to_be16(Data);
 	p.head.length  = cpu_to_be16( sizeof(p)-sizeof(Drbd_Header)
@@ -2903,11 +2919,13 @@
 	if (dump_packets > DUMP_SUMMARY) { \
 		INFO("%s:%d: %s [%d] %s %s " fmt , \
 		     file, line, current->comm, current->pid, \
-		     sockname, recv?"<<<":">>>" \
-		     , ## args ); \
+		     sockname, recv?"<<<":">>>", \
+		     ## args ); \
 	} \
 	else { \
-		INFO("%s " fmt, recv?"<<<":">>>", ## args ); \
+		INFO("%s %s " fmt, sockname, \
+		     recv?"<<<":">>>", \
+		     ## args ); \
 	} \
 } while (0)
 
@@ -2929,8 +2947,6 @@
 		break;
 
 	case Data:
-	case DataReply:
-	case RSDataReply:
 		INFOP("%s (sector %llx, id %llx, seq %x, f %x)\n", cmdname(cmd),
 		     (long long)be64_to_cpu(p->Data.sector), 
 		     (long long)be64_to_cpu(p->Data.block_id),
@@ -2939,6 +2955,14 @@
 		);
 		break;
 
+	case DataReply:
+	case RSDataReply:
+		INFOP("%s (sector %llx, id %llx)\n", cmdname(cmd),
+		     (long long)be64_to_cpu(p->Data.sector), 
+		     (long long)be64_to_cpu(p->Data.block_id)
+		);
+		break;
+
 	case RecvAck:
 	case WriteAck:
 	case NegAck:
Index: drbd_int.h
===================================================================
--- drbd_int.h	(revision 3504)
+++ drbd_int.h	(working copy)
@@ -1619,9 +1619,10 @@
 #ifdef DUMP_EACH_PACKET
 
 /*
- * variable that controls dumping
+ * variables that controls dumping
  */
 extern int dump_packets;
+extern int dump_packet_devs; 
 
 #define DUMP_NONE 0
 #define DUMP_SUMMARY 1
@@ -1638,7 +1639,8 @@
 dump_packet(drbd_dev *mdev, struct socket *sock,
 	    int recv, Drbd_Polymorph_Packet *p, char* file, int line)
 {
-	if (dump_packets > DUMP_NONE)
+	if (dump_packets > DUMP_NONE &&
+	    ( ( 1 << (int)(mdev-drbd_conf)) & dump_packet_devs) )
 		_dump_packet(mdev,sock,recv,p,file,line);
 }
 #else