Backout all changes to uvm after pmemrange (which will be backed out

separately).

a change at or just before the hackathon has either exposed or added a
very very nasty memory corruption bug that is giving us hell right now.
So in the interest of kernel stability these diffs are being backed out
until such a time as that corruption bug has been found and squashed,
then the ones that are proven good may slowly return.

a quick hitlist of the main commits this backs out:

mine:
uvm_objwire
the lock change in uvm_swap.c
using trees for uvm objects instead of the hash
removing the pgo_releasepg callback.

art@'s:
putting pmap_page_protect(VM_PROT_NONE) in uvm_pagedeactivate() since
all callers called that just prior anyway.

ok beck@, ariane@.

prompted by deraadt@.

1 files changed, 4 insertions, 2 deletions

diff --git a/sys/uvm/uvm_page.h b/sys/uvm/uvm_page.h
index e6d71c95ae9..5896286c871 100644
--- a/sys/uvm/uvm_page.h
+++ b/sys/uvm/uvm_page.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uvm_page.h,v 1.36 2009/06/14 03:04:08 deraadt Exp $	*/
+/*	$OpenBSD: uvm_page.h,v 1.37 2009/06/16 00:11:29 oga Exp $	*/
 /*	$NetBSD: uvm_page.h,v 1.19 2000/12/28 08:24:55 chs Exp $	*/
 
 /* 
@@ -108,7 +108,7 @@
 
 union vm_page_fq {
 	struct {
-		RB_ENTRY(vm_page)	tree;	/* hash table links (O)*/
+		TAILQ_ENTRY(vm_page)	hashq;	/* hash table links (O)*/
 		TAILQ_ENTRY(vm_page)	listq;	/* pages in same object (O)*/
 	}	queues;
 
@@ -122,6 +122,7 @@ struct vm_page {
 	union vm_page_fq	fq;		/* free and queue management */
 	TAILQ_ENTRY(vm_page)	pageq;		/* queue info for FIFO
 						 * queue or free list (P) */
+
 	struct vm_anon		*uanon;		/* anon (O,P) */
 	struct uvm_object	*uobject;	/* object (O,P) */
 	voff_t			offset;		/* offset into object (O,P) */
@@ -252,6 +253,7 @@ void		uvm_page_own(struct vm_page *, char *);
 #if !defined(PMAP_STEAL_MEMORY)
 boolean_t	uvm_page_physget(paddr_t *);
 #endif
+void		uvm_page_rehash(void);
 void		uvm_pageidlezero(void);
 
 void		uvm_pageactivate(struct vm_page *);