A little addendum. I wrote down the trace from ddb: exit_1 +0xdf vm_map_remove +0x47 vm_map_delete +0x104 vm_map_entry_delete +0x54 vm_object_deallocate +0x35 vm_object_collapse +0x48 vm_pager_next -- Juergen Hannken-Illjes - hannken@eis.cs.tu-bs.de - TU Braunschweig (W Germany)