message: file-backed-mmap: unmap range on request
diff: @@ -135,7 +135,7 @@ public:
  auto itFd = _fdMap.find(ptr);
  d_assert(itFd != _fdMap.end());
  - //munmap(ptr, itVma->second);
  + munmap(ptr, itVma->second);
  // TODO: unlink
  close(itFd->second);
  