Hi,

It seems that uvm_map_clean() might fall into infinite loop.
I'm not sure whether this bug shows up in the NetBSD world because
I'm just playing with UVM..

A fix is something like:

*** /home/k-abe/NetBSD/syssrc/sys/uvm/uvm_map.c	Mon Nov 27 01:40:03 2000
--- ../netbsd/src/sys/uvm/uvm_map.c	Fri Jan 12 18:16:58 2001
***************
*** 2474,2480 ****
  	 * Make a first pass to check for holes.
  	 */
  
! 	for (current = entry; current->start < end; current = current->next) {
  		if (UVM_ET_ISSUBMAP(current)) {
  			vm_map_unlock_read(map);
  			return (KERN_INVALID_ARGUMENT);
--- 2481,2491 ----
  	 * Make a first pass to check for holes.
  	 */
  
! 	for (current = entry; 
! #ifdef OSKIT	     
! 	     (current != &map->header) &&
! #endif
! 		 current->start < end; current = current->next) {
  		if (UVM_ET_ISSUBMAP(current)) {
  			vm_map_unlock_read(map);
  			return (KERN_INVALID_ARGUMENT);
***************
*** 2488,2494 ****
  
  	error = KERN_SUCCESS;
  
! 	for (current = entry; current->start < end; current = current->next) {
  		amap = current->aref.ar_amap;	/* top layer */
  		uobj = current->object.uvm_obj;	/* bottom layer */
  		KASSERT(start >= current->start);
--- 2499,2509 ----
  
  	error = KERN_SUCCESS;
  
! 	for (current = entry; 
! #ifdef OSKIT	     
! 	     (current != &map->header) &&
! #endif
! 		 current->start < end; current = current->next) {
  		amap = current->aref.ar_amap;	/* top layer */
  		uobj = current->object.uvm_obj;	/* bottom layer */
  		KASSERT(start >= current->start);

-- 
Kota Abe
Dept. of Computer Science, Univ. of Utah.
Media Center, Osaka City Univ.