VMEM_FREE
usevnodes = calc_cache_size(vmem_size(kmem_arena, VMEM_FREE|VMEM_ALLOC),
new_max = calc_cache_size(vmem_size(kmem_arena, VMEM_FREE|VMEM_ALLOC),
case VMEM_FREE:
case VMEM_FREE|VMEM_ALLOC:
total = vmem_size(kmem_arena, VMEM_ALLOC|VMEM_FREE);
free = vmem_size(kmem_arena, VMEM_FREE);