Update TODO

TODO

@@ -1,6 +1,3 @@
-In lbd, atomic writes will require a pblk array in the lbd object.  Not sure
-how to roll back partial allocations yet but it should be doable.
-
 Cache object sizing:
   - lbdcache size: multiple of num_online_cpus().
   - lbatviewcache:
@@ -23,10 +20,8 @@ Cache object sizing:
 
 
 TODO:
-  - Consistency in lbatview_elem_realloc().
-    If alloc fails, roll back.
-  - Allocate lbd pages using allocv and vmap them.
-    Same for pbat, when pbat_len() > 1.
+  - Allocate pbat pages using allocv and vmap them
+    (but only when pbat_len() > 1).
     Can we vmap compression workspace?
   - In *cache_get, call *_reset outside cache lock.
   - Implement vectorized lbatview_elem_pblk().