diff --git a/app/vmm_log.ml b/app/vmm_log.ml
index a0fe782..8d688c1 100644
--- a/app/vmm_log.ml
+++ b/app/vmm_log.ml
@@ -5,8 +5,6 @@
 (* communication channel is a single unix domain socket shared between vmmd and
    vmm_log.  There are two commands from vmmd to vmm_log, history and data. *)
 
-(* TODO: this should (optionally?) persist to a remote target *)
-
 (* internally, a ring buffer for the last N events is preserved in memory
    each new event is directly written to disk! *)
 
@@ -55,11 +53,6 @@ let write_to_file file =
   in
   mvar, write_loop
 
-(* TODO:
-   - should there be an unsubscribe <prefix> command?
-   - should there be acks for history/datain?
- *)
-
 let tree = ref Vmm_trie.empty
 
 let bcast = ref 0L
diff --git a/src/vmm_core.ml b/src/vmm_core.ml
index 694736b..6f1c4b4 100644
--- a/src/vmm_core.ml
+++ b/src/vmm_core.ml
@@ -142,7 +142,6 @@ let good_bridge idxs nets =
   List.for_all (fun n -> String.Map.mem n nets) idxs
 
 let vm_matches_res (res : policy) (vm : vm_config)  =
-  (* TODO block device *)
   res.vms >= 1 && IS.mem vm.cpuid res.cpuids &&
   vm.requested_memory <= res.memory &&
   good_bridge vm.network res.bridges
diff --git a/src/vmm_engine.ml b/src/vmm_engine.ml
index 7145e62..0df0648 100644
--- a/src/vmm_engine.ml
+++ b/src/vmm_engine.ml
@@ -12,10 +12,6 @@ type 'a t = {
   console_counter : int64 ;
   stats_counter : int64 ;
   log_counter : int64 ;
-  (* TODO: refine, maybe:
-     bridges : (Macaddr.t String.Map.t * String.Set.t) String.Map.t ; *)
-  used_bridges : String.Set.t String.Map.t ;
-  (* TODO: used block devices (since each may only be active once) *)
   resources : Vmm_resources.t ;
   tasks : 'a String.Map.t ;
 }
@@ -25,7 +21,6 @@ let init wire_version = {
   console_counter = 1L ;
   stats_counter = 1L ;
   log_counter = 1L ;
-  used_bridges = String.Map.empty ;
   resources = Vmm_resources.empty ;
   tasks = String.Map.empty ;
 }
@@ -58,7 +53,6 @@ let handle_create t hdr vm_config =
   (* prepare VM: save VM image to disk, create fifo, ... *)
   Vmm_unix.prepare name vm_config >>= fun taps ->
   Logs.debug (fun m -> m "prepared vm with taps %a" Fmt.(list ~sep:(unit ",@ ") string) taps) ;
-  (* TODO should we pre-reserve sth in t? *)
   let cons_out =
     let header = Vmm_asn.{ version = t.wire_version ; sequence = t.console_counter ; id = name } in
     (header, `Command (`Console_cmd `Console_add))
@@ -70,16 +64,7 @@ let handle_create t hdr vm_config =
           Logs.debug (fun m -> m "exec()ed vm") ;
           Vmm_resources.insert_vm t.resources name vm >>= fun resources ->
           let tasks = String.Map.add (string_of_id name) task t.tasks in
-          let used_bridges =
-            List.fold_left2 (fun b br ta ->
-                let old = match String.Map.find br b with
-                  | None -> String.Set.empty
-                  | Some x -> x
-                in
-                String.Map.add br (String.Set.add ta old) b)
-              t.used_bridges vm_config.network taps
-          in
-          let t = { t with resources ; tasks ; used_bridges } in
+          let t = { t with resources ; tasks } in
           let t, out = log t name (`VM_start (vm.pid, vm.taps, None)) in
           let data = `Success (`String "created VM") in
           Ok (t, [ `Data (hdr, data) ; out ], name, vm)))
@@ -95,19 +80,10 @@ let handle_shutdown t name vm r =
    | Ok () -> ()
    | Error (`Msg e) -> Logs.warn (fun m -> m "%s while shutdown vm %a" e pp_vm vm)) ;
   let resources = Vmm_resources.remove t.resources name in
-  let used_bridges =
-    List.fold_left2 (fun b br ta ->
-        let old = match String.Map.find br b with
-          | None -> String.Set.empty
-          | Some x -> x
-        in
-        String.Map.add br (String.Set.remove ta old) b)
-      t.used_bridges vm.config.network vm.taps
-  in
   let stat_out = `Stats_remove in
   let header = Vmm_asn.{ version = t.wire_version ; sequence = t.stats_counter ; id = name } in
   let tasks = String.Map.remove (string_of_id name) t.tasks in
-  let t = { t with stats_counter = Int64.succ t.stats_counter ; resources ; used_bridges ; tasks } in
+  let t = { t with stats_counter = Int64.succ t.stats_counter ; resources ; tasks } in
   let t, logout = log t name (`VM_stop (vm.pid, r))
   in
   (t, [ `Stat (header, `Command (`Stats_cmd stat_out)) ; logout ])
diff --git a/src/vmm_resources.ml b/src/vmm_resources.ml
index f51799b..e9459d8 100644
--- a/src/vmm_resources.ml
+++ b/src/vmm_resources.ml
@@ -10,7 +10,8 @@ type res_entry = {
 let empty_res = { running_vms = 0 ; used_memory = 0 }
 
 let check_resource (policy : policy) (vm : vm_config) (res : res_entry) =
-  succ res.running_vms <= policy.vms && res.used_memory + vm.requested_memory <= policy.memory &&
+  succ res.running_vms <= policy.vms &&
+  res.used_memory + vm.requested_memory <= policy.memory &&
   vm_matches_res policy vm
 
 let check_resource_policy (policy : policy) (res : res_entry) =
@@ -81,8 +82,10 @@ let check_policy_below t name p =
         match res, entry with
         | Ok p, Policy p' -> if is_sub ~super:p ~sub:p then Ok p' else Error ()
         | Ok p, Vm vm ->
-          (* TODO block device *)
-          if IS.mem vm.config.cpuid p.cpuids && good_bridge vm.config.network p.bridges then Ok p else Error ()
+          let cfg = vm.config in
+          if IS.mem cfg.cpuid p.cpuids && good_bridge cfg.network p.bridges
+          then Ok p
+          else Error ()
         | res, _ -> res)
     (Ok p)
 
diff --git a/src/vmm_unix.ml b/src/vmm_unix.ml
index b6cb824..17fa587 100644
--- a/src/vmm_unix.ml
+++ b/src/vmm_unix.ml
@@ -146,7 +146,6 @@ let cpuset cpu =
   | x -> Error (`Msg ("unsupported operating system " ^ x))
 
 let exec name vm taps =
-  (* TODO: --net-mac=xx *)
   let net = List.map (fun t -> "--net=" ^ t) taps in
   let argv = match vm.argv with None -> [] | Some xs -> xs in
   (match taps with