svn commit: r242655 - head/sys/kern

[Alfred Perlstein]

Author: alfred
Date: Tue Nov  6 04:10:32 2012
New Revision: 242655
URL: http://svnweb.freebsd.org/changeset/base/242655

Log:
  export VM_MIN_KERNEL_ADDRESS and VM_MAX_KERNEL_ADDRESS via sysctl.
  
  On several platforms the are determined by too many nested #defines to be
  easily discernible.  This will aid in development of auto-tuning.

Modified:
  head/sys/kern/kern_malloc.c

Modified: head/sys/kern/kern_malloc.c
==============================================================================
--- head/sys/kern/kern_malloc.c	Tue Nov  6 02:43:41 2012	(r242654)
+++ head/sys/kern/kern_malloc.c	Tue Nov  6 04:10:32 2012	(r242655)
@@ -186,6 +186,14 @@ struct {
  */
 static uma_zone_t mt_zone;
 
+static u_long vm_min_kernel_address = VM_MIN_KERNEL_ADDRESS;
+SYSCTL_ULONG(_vm, OID_AUTO, min_kernel_address, CTLFLAG_RD,
+    &vm_min_kernel_address, 0, "Min kernel address");
+
+static u_long vm_max_kernel_address = VM_MAX_KERNEL_ADDRESS;
+SYSCTL_ULONG(_vm, OID_AUTO, max_kernel_address, CTLFLAG_RD,
+    &vm_max_kernel_address, 0, "Max kernel address");
+
 u_long vm_kmem_size;
 SYSCTL_ULONG(_vm, OID_AUTO, kmem_size, CTLFLAG_RDTUN, &vm_kmem_size, 0,
     "Size of kernel memory");