svn commit: r257549 - head/sys/arm/include

[Alan Cox]

Author: alc
Date: Sat Nov  2 17:08:20 2013
New Revision: 257549
URL: http://svnweb.freebsd.org/changeset/base/257549

Log:
  Don't create a distinct free page pool for segregating allocations that are
  accessed through the direct map unless the kernel configuration actually
  includes a direct map.  Only a few configurations do, and for the rest the
  unnecessary free page pool is a small pessimization.
  
  Tested by:	zbb
  MFC after:	6 weeks

Modified:
  head/sys/arm/include/vmparam.h

Modified: head/sys/arm/include/vmparam.h
==============================================================================
--- head/sys/arm/include/vmparam.h	Sat Nov  2 15:13:02 2013	(r257548)
+++ head/sys/arm/include/vmparam.h	Sat Nov  2 17:08:20 2013	(r257549)
@@ -82,15 +82,21 @@
 #define	VM_PHYSSEG_DENSE
 
 /*
- * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
- * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
- * the pool from which physical pages for small UMA objects are
- * allocated.
+ * Create two or three free page pools depending on the existence of a direct
+ * map: VM_FREEPOOL_DEFAULT is the default pool from which physical pages are
+ * allocated, and VM_FREEPOOL_DIRECT is the pool from which physical pages for
+ * small UMA objects are allocated.
  */
+#ifdef ARM_USE_SMALL_ALLOC
 #define	VM_NFREEPOOL		3
 #define	VM_FREEPOOL_CACHE	2
-#define	VM_FREEPOOL_DEFAULT	0
 #define	VM_FREEPOOL_DIRECT	1
+#else
+#define	VM_NFREEPOOL		2
+#define	VM_FREEPOOL_CACHE	1
+#define	VM_FREEPOOL_DIRECT	0
+#endif
+#define	VM_FREEPOOL_DEFAULT	0
 
 /*
  * we support 2 free lists: