am 9d8ed53e: Add some logging to track potential write halt -: a tiny bit of performance hit +: let us track the SD card write halt issue low-risk change

Merge commit '9d8ed53e28d6de6aba89b12ebc8871d6346e0ba5' into eclair-mr2

* commit '9d8ed53e28d6de6aba89b12ebc8871d6346e0ba5':
  Add some logging to track potential write halt