Replace kernel virtual address space allocation with vmem. This provides

transparent layering and better fragmentation.

 - Normalize functions that allocate memory to use kmem_*
 - Those that allocate address space are named kva_*
 - Those that operate on maps are named kmap_*
 - Implement recursive allocation handling for kmem_arena in vmem.

Reviewed by:	alc
Tested by:	pho
Sponsored by:	EMC / Isilon Storage Division

2 files changed, 4 insertions, 3 deletions

diff --git a/sys/cddl/compat/opensolaris/kern/opensolaris_kmem.c b/sys/cddl/compat/opensolaris/kern/opensolaris_kmem.c
index 3bcbc0b..543a3a6 100644
--- a/sys/cddl/compat/opensolaris/kern/opensolaris_kmem.c
+++ b/sys/cddl/compat/opensolaris/kern/opensolaris_kmem.c
@@ -62,6 +62,8 @@ static struct mtx kmem_items_mtx;
 MTX_SYSINIT(kmem_items_mtx, &kmem_items_mtx, "kmem_items", MTX_DEF);
 #endif	/* KMEM_DEBUG */
 
+#include <sys/vmem.h>
+
 void *
 zfs_kmem_alloc(size_t size, int kmflags)
 {
@@ -135,7 +137,7 @@ uint64_t
 kmem_used(void)
 {
 
-	return (kmem_map->size);
+	return (vmem_size(kmem_arena, VMEM_ALLOC));
 }
 
 static int
diff --git a/sys/cddl/compat/opensolaris/sys/kmem.h b/sys/cddl/compat/opensolaris/sys/kmem.h
index ba8b42d..d6179a1 100644
--- a/sys/cddl/compat/opensolaris/sys/kmem.h
+++ b/sys/cddl/compat/opensolaris/sys/kmem.h
@@ -32,6 +32,7 @@
 #include <sys/param.h>
 #include <sys/proc.h>
 #include <sys/malloc.h>
+#include <sys/vmem.h>
 
 #include <vm/uma.h>
 #include <vm/vm.h>
@@ -61,8 +62,6 @@ typedef struct kmem_cache {
 	void		*kc_private;
 } kmem_cache_t;
 
-#define vmem_t	void
-
 void *zfs_kmem_alloc(size_t size, int kmflags);
 void zfs_kmem_free(void *buf, size_t size);
 uint64_t kmem_size(void);