As of r257209, all architectures have defined VM_KMEM_SIZE_SCALE. In other

words, every architecture is now auto-sizing the kmem arena.  This revision
changes kmeminit() so that the definition of VM_KMEM_SIZE_SCALE becomes
mandatory and the definition of VM_KMEM_SIZE becomes optional.

Replace or eliminate all existing definitions of VM_KMEM_SIZE.  With
auto-sizing enabled, VM_KMEM_SIZE effectively became an alternate spelling
for VM_KMEM_SIZE_MIN on most architectures.  Use VM_KMEM_SIZE_MIN for
clarity.

Change kmeminit() so that the effect of defining VM_KMEM_SIZE is similar to
that of setting the tunable vm.kmem_size.  Whereas the macros
VM_KMEM_SIZE_{MAX,MIN,SCALE} have had the same effect as the tunables
vm.kmem_size_{max,min,scale}, the effects of VM_KMEM_SIZE and vm.kmem_size
have been distinct.  In particular, whereas VM_KMEM_SIZE was overridden by
VM_KMEM_SIZE_{MAX,MIN,SCALE} and vm.kmem_size_{max,min,scale}, vm.kmem_size
was not.  Remedy this inconsistency.  Now, VM_KMEM_SIZE can be used to set
the size of the kmem arena at compile-time without that value being
overridden by auto-sizing.

Update the nearby comments to reflect the kmem submap being replaced by the
kmem arena.  Stop duplicating the auto-sizing formula in every machine-
dependent vmparam.h and place it in kmeminit() where auto-sizing takes
place.

Reviewed by:	kib (an earlier version)
Sponsored by:	EMC / Isilon Storage Division

1 files changed, 2 insertions, 10 deletions

diff --git a/sys/ia64/include/vmparam.h b/sys/ia64/include/vmparam.h
index 1fda472..edae4c4 100644
--- a/sys/ia64/include/vmparam.h
+++ b/sys/ia64/include/vmparam.h
@@ -189,19 +189,11 @@
 #define	USRSTACK		VM_MAXUSER_ADDRESS
 #define	IA64_BACKINGSTORE	(USRSTACK - (2 * MAXSSIZ) - PAGE_SIZE)
 
-/* virtual sizes (bytes) for various kernel submaps */
-#ifndef VM_KMEM_SIZE
-#define VM_KMEM_SIZE		(12 * 1024 * 1024)
-#endif
-
 /*
- * How many physical pages per KVA page allocated.
- * min(max(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE),
- *     VM_KMEM_SIZE_MIN), VM_KMEM_SIZE_MAX)
- * is the total KVA space allocated for kmem_map.
+ * How many physical pages per kmem arena virtual page.
  */
 #ifndef VM_KMEM_SIZE_SCALE
-#define	VM_KMEM_SIZE_SCALE	(4) /* XXX 8192 byte pages */
+#define	VM_KMEM_SIZE_SCALE	(4)
 #endif
 
 /* initial pagein size of beginning of executable file */