* Private and temporary vm_caches now maintain their new virtual_base field, which allows

them to commit substantially less memory (we we're committing about 40 MB (!) too much
  after a complete system boot). This means you'll run out of memory less likely now.
* fill_area_info() no longer filters out kernel protection flags - we may want to keep
  filtering them when called from userland, though, dunno.
* Added new debugger command "avail" which shows how much memory has been committed, and
  how much is regarded as free space.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19771 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/vm_types.h

@@ -1,5 +1,5 @@
 /* 
- * Copyright 2002-2006, Axel Dörfler, [email protected].
+ * Copyright 2002-2007, Axel Dörfler, [email protected].
  * Distributed under the terms of the MIT License.
  *
  * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
@@ -75,7 +75,9 @@ typedef struct vm_cache {
 	vm_cache_ref		*ref;
 	struct vm_cache		*source;
 	struct vm_store		*store;
+	off_t				virtual_base;
 	off_t				virtual_size;
+		// the size is absolute, and independent from virtual_base
 	uint32				page_count;
 	uint32				temporary : 1;
 	uint32				scan_skip : 1;