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@

1 files changed, 7 insertions, 2 deletions

diff --git a/sys/uvm/uvm_extern.h b/sys/uvm/uvm_extern.h
index 5ff1e2ddad2..bc6a766590a 100644
--- a/sys/uvm/uvm_extern.h
+++ b/sys/uvm/uvm_extern.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uvm_extern.h,v 1.76 2009/04/20 00:30:18 oga Exp $	*/
+/*	$OpenBSD: uvm_extern.h,v 1.77 2009/06/01 17:42:33 ariane Exp $	*/
 /*	$NetBSD: uvm_extern.h,v 1.57 2001/03/09 01:02:12 chs Exp $	*/
 
 /*
@@ -221,11 +221,12 @@ typedef int		vm_prot_t;
 #define	UVM_PGA_ZERO		0x0002	/* returned page must be zeroed */
 
 /*
- * flags for uvm_pglistalloc()
+ * flags for uvm_pglistalloc() and uvm_pmr_getpages()
  */
 #define UVM_PLA_WAITOK		0x0001	/* may sleep */
 #define UVM_PLA_NOWAIT		0x0002	/* can't sleep (need one of the two) */
 #define UVM_PLA_ZERO		0x0004	/* zero all pages before returning */
+#define UVM_PLA_TRY_CONTIG	0x0008	/* try to allocate a contig range */
 
 /*
  * lockflags that control the locking behavior of various functions.
@@ -589,6 +590,10 @@ int			uvm_pglistalloc(psize_t, paddr_t,
 				struct pglist *, int, int); 
 void			uvm_pglistfree(struct pglist *);
 
+/* uvm_pmemrange.c */
+
+void			uvm_pmr_use_inc(paddr_t, paddr_t);
+
 /* uvm_swap.c */
 void			uvm_swap_init(void);