physmem allocator: change the view of free memory from single free pages

to free ranges.
Classify memory based on region with associated use-counter (which is used
to construct a priority list of where to allocate memory).

Based on code from tedu@, help from many.
Ok art@

3 files changed, 22 insertions, 13 deletions

diff --git a/sys/arch/i386/i386/pmap.c b/sys/arch/i386/i386/pmap.c
index 753298eb42a..91fd6edb555 100644
--- a/sys/arch/i386/i386/pmap.c
+++ b/sys/arch/i386/i386/pmap.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pmap.c,v 1.136 2009/02/05 01:13:21 oga Exp $	*/
+/*	$OpenBSD: pmap.c,v 1.137 2009/06/01 17:42:33 ariane Exp $	*/
 /*	$NetBSD: pmap.c,v 1.91 2000/06/02 17:46:37 thorpej Exp $	*/
 
 /*
@@ -2074,7 +2074,7 @@ pmap_do_remove(struct pmap *pmap, vaddr_t sva, vaddr_t eva, int flags)
 		/* If PTP is no longer being used, free it. */
 		if (ptp && ptp->wire_count <= 1) {
 			pmap_drop_ptp(pmap, va, ptp, ptes);
-			TAILQ_INSERT_TAIL(&empty_ptps, ptp, listq);
+			TAILQ_INSERT_TAIL(&empty_ptps, ptp, fq.queues.listq);
 		}
 
 		if (!shootall)
@@ -2088,7 +2088,7 @@ pmap_do_remove(struct pmap *pmap, vaddr_t sva, vaddr_t eva, int flags)
 	pmap_unmap_ptes(pmap);
 	PMAP_MAP_TO_HEAD_UNLOCK();
 	while ((ptp = TAILQ_FIRST(&empty_ptps)) != NULL) {
-		TAILQ_REMOVE(&empty_ptps, ptp, listq);
+		TAILQ_REMOVE(&empty_ptps, ptp, fq.queues.listq);
 		uvm_pagefree(ptp);
 	}
 }
@@ -2145,7 +2145,8 @@ pmap_page_remove(struct vm_page *pg)
 		if (pve->pv_ptp && --pve->pv_ptp->wire_count <= 1) {
 			pmap_drop_ptp(pve->pv_pmap, pve->pv_va,
 			    pve->pv_ptp, ptes);
-			TAILQ_INSERT_TAIL(&empty_ptps, pve->pv_ptp, listq);
+			TAILQ_INSERT_TAIL(&empty_ptps, pve->pv_ptp,
+			    fq.queues.listq);
 		}
 
 		pmap_tlb_shootpage(pve->pv_pmap, pve->pv_va);
@@ -2158,7 +2159,7 @@ pmap_page_remove(struct vm_page *pg)
 	pmap_tlb_shootwait();
 
 	while ((ptp = TAILQ_FIRST(&empty_ptps)) != NULL) {
-		TAILQ_REMOVE(&empty_ptps, ptp, listq);
+		TAILQ_REMOVE(&empty_ptps, ptp, fq.queues.listq);
 		uvm_pagefree(ptp);
 	}
 }
diff --git a/sys/arch/i386/i386/pmapae.c b/sys/arch/i386/i386/pmapae.c
index 683d282379a..b13ff7c9463 100644
--- a/sys/arch/i386/i386/pmapae.c
+++ b/sys/arch/i386/i386/pmapae.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pmapae.c,v 1.15 2009/01/27 22:14:13 miod Exp $	*/
+/*	$OpenBSD: pmapae.c,v 1.16 2009/06/01 17:42:33 ariane Exp $	*/
 
 /*
  * Copyright (c) 2006 Michael Shalayeff
@@ -1453,14 +1453,15 @@ pmap_remove_pae(struct pmap *pmap, vaddr_t sva, vaddr_t eva)
 				ptp->wire_count = 0;
 				/* Postpone free to after shootdown. */
 				uvm_pagerealloc(ptp, NULL, 0);
-				TAILQ_INSERT_TAIL(&empty_ptps, ptp, listq);
+				TAILQ_INSERT_TAIL(&empty_ptps, ptp,
+				    fq.queues.listq);
 			}
 		}
 		pmap_tlb_shootnow(cpumask);
 		pmap_unmap_ptes_pae(pmap);		/* unlock pmap */
 		PMAP_MAP_TO_HEAD_UNLOCK();
 		while ((ptp = TAILQ_FIRST(&empty_ptps)) != NULL) {
-			TAILQ_REMOVE(&empty_ptps, ptp, listq);
+			TAILQ_REMOVE(&empty_ptps, ptp, fq.queues.listq);
 			uvm_pagefree(ptp);
 		}
 		return;
@@ -1546,7 +1547,7 @@ pmap_remove_pae(struct pmap *pmap, vaddr_t sva, vaddr_t eva)
 			ptp->wire_count = 0;
 			/* Postpone free to after shootdown. */
 			uvm_pagerealloc(ptp, NULL, 0);
-			TAILQ_INSERT_TAIL(&empty_ptps, ptp, listq);
+			TAILQ_INSERT_TAIL(&empty_ptps, ptp, fq.queues.listq);
 		}
 	}
 
@@ -1554,7 +1555,7 @@ pmap_remove_pae(struct pmap *pmap, vaddr_t sva, vaddr_t eva)
 	pmap_unmap_ptes_pae(pmap);
 	PMAP_MAP_TO_HEAD_UNLOCK();
 	while ((ptp = TAILQ_FIRST(&empty_ptps)) != NULL) {
-		TAILQ_REMOVE(&empty_ptps, ptp, listq);
+		TAILQ_REMOVE(&empty_ptps, ptp, fq.queues.listq);
 		uvm_pagefree(ptp);
 	}
 }
@@ -1665,7 +1666,7 @@ pmap_page_remove_pae(struct vm_page *pg)
 				/* Postpone free to after shootdown. */
 				uvm_pagerealloc(pve->pv_ptp, NULL, 0);
 				TAILQ_INSERT_TAIL(&empty_ptps, pve->pv_ptp,
-				    listq);
+				    fq.queues.listq);
 			}
 		}
 		pmap_unmap_ptes_pae(pve->pv_pmap);	/* unlocks pmap */
@@ -1676,7 +1677,7 @@ pmap_page_remove_pae(struct vm_page *pg)
 	PMAP_HEAD_TO_MAP_UNLOCK();
 	pmap_tlb_shootnow(cpumask);
 	while ((ptp = TAILQ_FIRST(&empty_ptps)) != NULL) {
-		TAILQ_REMOVE(&empty_ptps, ptp, listq);
+		TAILQ_REMOVE(&empty_ptps, ptp, fq.queues.listq);
 		uvm_pagefree(ptp);
 	}
 }
diff --git a/sys/arch/i386/include/vmparam.h b/sys/arch/i386/include/vmparam.h
index 9c2163e6c2d..41e95b3f418 100644
--- a/sys/arch/i386/include/vmparam.h
+++ b/sys/arch/i386/include/vmparam.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: vmparam.h,v 1.41 2008/07/18 16:40:17 kurt Exp $	*/
+/*	$OpenBSD: vmparam.h,v 1.42 2009/06/01 17:42:33 ariane Exp $	*/
 /*	$NetBSD: vmparam.h,v 1.15 1994/10/27 04:16:34 cgd Exp $	*/
 
 /*-
@@ -118,6 +118,13 @@
 #define VM_FREELIST_DEFAULT	0
 #define VM_FREELIST_FIRST16	1
 
+/* reserve ISA-DMA and 32-bit DMA memory */
+#define UVM_IO_RANGES							\
+	{								\
+		{ 0, 0x00ffffffUL },					\
+		{ 0, 0xffffffffUL },					\
+	}
+
 #define __HAVE_VM_PAGE_MD
 struct pv_entry;
 struct vm_page_md {