Several bugfixes/improvements:

	1) Make it much less likely to miss a wakeup in vm_page_free_wakeup
	2) Create a new entry point into pmap: pmap_ts_referenced, eliminates
	   the need to scan the pv lists twice in many cases.  Perhaps there
	   is alot more to do here to work on minimizing pv list manipulation
	3) Minor improvements to vm_pageout including the use of pmap_ts_ref.
	4) Major changes and code improvement to pmap.  This code has had
	   several serious bugs in page table page manipulation.  In order
	   to simplify the problem, and hopefully solve it for once and all,
	   page table pages are no longer "managed" with the pv list stuff.
	   Page table pages are only (mapped and held/wired) or
	   (free and unused) now.  Page table pages are never inactive,
	   active or cached.  These changes have probably fixed the
	   hold count problems, but if they haven't, then the code is
	   simpler anyway for future bugfixing.
	5) The pmap code has been sorely in need of re-organization, and I
	   have taken a first (of probably many) steps.  Please tell me
	   if you have any ideas.

1 files changed, 2 insertions, 1 deletions

diff --git a/sys/vm/pmap.h b/sys/vm/pmap.h
index 78c59a5..e123b90 100644
--- a/sys/vm/pmap.h
+++ b/sys/vm/pmap.h
@@ -61,7 +61,7 @@
  * any improvements or extensions that they make and grant Carnegie the
  * rights to redistribute these changes.
  *
- * $Id: pmap.h,v 1.9 1996/03/28 04:54:50 dyson Exp $
+ * $Id: pmap.h,v 1.10 1996/05/19 07:36:44 dyson Exp $
  */
 
 /*
@@ -101,6 +101,7 @@ void		 pmap_growkernel __P((vm_offset_t));
 void		 pmap_init __P((vm_offset_t, vm_offset_t));
 boolean_t	 pmap_is_modified __P((vm_offset_t pa));
 boolean_t	 pmap_is_referenced __P((vm_offset_t pa));
+boolean_t	 pmap_ts_referenced __P((vm_offset_t pa));
 void		 pmap_kenter __P((vm_offset_t, vm_offset_t));
 void		 pmap_kremove __P((vm_offset_t));
 vm_offset_t	 pmap_map __P((vm_offset_t, vm_offset_t, vm_offset_t, int));