sys/vm/vm_map.c

3732 	size_t grow_amount, guard, max_grow;
3771 		grow_amount = round_page(stack_entry->start - addr);
3778 		grow_amount = round_page(addr + 1 - stack_entry->end);
3789 	if (grow_amount > max_grow)
3798 	if (is_procstack && (ctob(vm->vm_ssize) + grow_amount > stacklim))
3805 		    ctob(vm->vm_ssize) + grow_amount)) {
3813 	grow_amount = roundup(grow_amount, sgrowsiz);
3814 	if (grow_amount > max_grow)
3815 		grow_amount = max_grow;
3816 	if (is_procstack && (ctob(vm->vm_ssize) + grow_amount > stacklim)) {
3817 		grow_amount = trunc_page((vm_size_t)stacklim) -
3825 	if (is_procstack && (ctob(vm->vm_ssize) + grow_amount > limit))
3826 		grow_amount = limit - ctob(vm->vm_ssize);
3830 		if (ptoa(pmap_wired_count(map->pmap)) + grow_amount > lmemlim) {
3838 			    ptoa(pmap_wired_count(map->pmap)) + grow_amount)) {
3849 	if (map->size + grow_amount > vmemlim) {
3856 		if (racct_set(p, RACCT_VMEM, map->size + grow_amount)) {
3872 		grow_start = gap_entry->end - grow_amount;
3873 		if (gap_entry->start + grow_amount == gap_entry->end) {
3879 			MPASS(gap_entry->start < gap_entry->end - grow_amount);
3880 			gap_entry->end -= grow_amount;
3885 		    grow_start + grow_amount,
3895 				gap_entry->end += grow_amount;
3904 		if (cred != NULL && !swap_reserve_by_cred(grow_amount, cred))
3911 		    (vm_size_t)grow_amount, cred != NULL)) {
3912 			if (gap_entry->start + grow_amount == gap_entry->end)
3915 				gap_entry->start += grow_amount;
3916 			stack_entry->end += grow_amount;
3917 			map->size += grow_amount;
3924 		vm->vm_ssize += btoc(grow_amount);
3931 		vm_map_wire(map, grow_start, grow_start + grow_amount,