Checkpoint of a new physical memory backed object type, that does not

have pv_entries.  This is intended for very special circumstances,
eg: a certain database that has a 1GB shm segment mapped into 300
processes.  That would consume 2GB of kvm just to hold the pv_entries
alone.  This would not be used on systems unless the physical ram was
available, as it's not pageable.

This is a work-in-progress, but is a useful and functional checkpoint.
Matt has got some more fixes for it that will be committed soon.

Reviewed by:	dillon

1 files changed, 11 insertions, 1 deletions

diff --git a/sys/vm/vm_object.h b/sys/vm/vm_object.h
index 5fb2e6945232..62a3bbe24168 100644
--- a/sys/vm/vm_object.h
+++ b/sys/vm/vm_object.h
@@ -74,7 +74,8 @@
 #include <sys/queue.h>
 #include <machine/atomic.h>
 
-enum obj_type { OBJT_DEFAULT, OBJT_SWAP, OBJT_VNODE, OBJT_DEVICE, OBJT_DEAD };
+enum obj_type { OBJT_DEFAULT, OBJT_SWAP, OBJT_VNODE, OBJT_DEVICE, OBJT_PHYS,
+		OBJT_DEAD };
 typedef u_char objtype_t;
 
 /*
@@ -123,6 +124,15 @@ struct vm_object {
 		} devp;
 
 		/*
+		 * Physmem pager
+		 *
+		 *	physp_pglist - list of allocated pages
+		 */
+		struct {
+			TAILQ_HEAD(, vm_page) physp_pglist;
+		} physp;
+
+		/*
 		 * Swap pager
 		 *
 		 *	swp_bcount - number of swap 'swblock' metablocks, each