Function vmspace_alloc

freebsd/vm/vm_map.c:324–347

* Allocate a vmspace structure, including a vm_map and pmap, * and initialize those structures. The refcnt is set to 1. */

 * and initialize those structures.  The refcnt is set to 1.
 */
struct vmspace *
vmspace_alloc(vm_offset_t min, vm_offset_t max, pmap_pinit_t pinit)
{
	struct vmspace *vm;

	vm = uma_zalloc(vmspace_zone, M_WAITOK);
	KASSERT(vm->vm_map.pmap == NULL, ("vm_map.pmap must be NULL"));
	if (!pinit(vmspace_pmap(vm))) {
		uma_zfree(vmspace_zone, vm);
		return (NULL);
	}
	CTR1(KTR_VM, "vmspace_alloc: %p", vm);
	_vm_map_init(&vm->vm_map, vmspace_pmap(vm), min, max);
	refcount_init(&vm->vm_refcnt, 1);
	vm->vm_shm = NULL;
	vm->vm_swrss = 0;
	vm->vm_tsize = 0;
	vm->vm_dsize = 0;
	vm->vm_ssize = 0;
	vm->vm_taddr = 0;
	vm->vm_daddr = 0;
	vm->vm_maxsaddr = 0;
	return (vm);
}

#ifdef RACCT
static void