Various bugfixes/cleanups from me and others:

1) Remove potential race conditions on waking up in vm_page_free_wakeup
   by making sure that it is at splvm().
2) Fix another bug in vm_map_simplify_entry.
3) Be more complete about converting from default to swap pager
   when an object grows to be large enough that there can be
   a problem with data structure allocation under low memory
   conditions.
4) Make some madvise code more efficient.
5) Added some comments.

1 files changed, 14 insertions, 1 deletions

diff --git a/sys/vm/default_pager.c b/sys/vm/default_pager.c
index 9c7acdf..ee477eb 100644
--- a/sys/vm/default_pager.c
+++ b/sys/vm/default_pager.c
@@ -28,7 +28,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: default_pager.c,v 1.7 1996/05/24 05:14:44 dyson Exp $
+ *	$Id: default_pager.c,v 1.8 1996/05/29 05:12:23 dyson Exp $
  */
 
 #include <sys/param.h>
@@ -36,6 +36,7 @@
 #include <sys/kernel.h>
 #include <sys/malloc.h>
 #include <sys/queue.h>
+#include <sys/vmmeter.h>
 
 #include <vm/vm.h>
 #include <vm/vm_param.h>
@@ -153,3 +154,15 @@ default_pager_convert_to_swap(object)
 		object->type = OBJT_DEFAULT;
 	}
 }
+
+void
+default_pager_convert_to_swapq(object)
+	vm_object_t object;
+{
+	if (object &&
+		(object->type == OBJT_DEFAULT) &&
+		(object != kernel_object && object != kmem_object) &&
+		(object->size > ((cnt.v_page_count - cnt.v_wire_count) / 4)))
+		default_pager_convert_to_swap(object);
+}
+