From 2cf36c8f6790af9b84cf3cda0f7ef0755457abd9 Mon Sep 17 00:00:00 2001
From: Alan Cox <alc@FreeBSD.org>
Date: Wed, 10 Nov 2010 17:57:34 +0000
Subject: [PATCH] Enable reservation-based physical memory allocation.  Even
 without the creation of large page mappings in the pmap, it can provide
 modest performance benefits.  In particular, for a "buildworld" on a 2x 1GHz
 Ultrasparc IIIi it reduced the wall clock time by 2.2% and the system time by
 12.6%.

Tested by:	marius@
---
 sys/sparc64/include/vmparam.h | 11 +++++++++--
 sys/vm/vm_reserv.c            |  2 +-
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/sys/sparc64/include/vmparam.h b/sys/sparc64/include/vmparam.h
index b9ce5466315..b92312efc0b 100644
--- a/sys/sparc64/include/vmparam.h
+++ b/sys/sparc64/include/vmparam.h
@@ -128,10 +128,17 @@
 #endif
 
 /*
- * Disable superpage reservations.
+ * Enable superpage reservations: 1 level.
  */
 #ifndef	VM_NRESERVLEVEL
-#define	VM_NRESERVLEVEL		0
+#define	VM_NRESERVLEVEL		1
+#endif
+
+/*
+ * Level 0 reservations consist of 512 pages.
+ */
+#ifndef	VM_LEVEL_0_ORDER
+#define	VM_LEVEL_0_ORDER	9
 #endif
 
 /*
diff --git a/sys/vm/vm_reserv.c b/sys/vm/vm_reserv.c
index 423bb3115af..f5f44f7d281 100644
--- a/sys/vm/vm_reserv.c
+++ b/sys/vm/vm_reserv.c
@@ -194,7 +194,7 @@ sysctl_vm_reserv_partpopq(SYSCTL_HANDLER_ARGS)
 		}
 		mtx_unlock(&vm_page_queue_free_mtx);
 		sbuf_printf(&sbuf, "%5d: %6dK, %6d\n", level,
-		    unused_pages * (PAGE_SIZE / 1024), counter);
+		    unused_pages * ((int)PAGE_SIZE / 1024), counter);
 	}
 	error = sbuf_finish(&sbuf);
 	sbuf_delete(&sbuf);