> This is similar to the "changes" file proposed above, but it´s simple, does > not > require two new RPCs (a server would respond to a Tinval with an Rerror > (unknown request or whatever), is not an upcall (although behaves as one) and > may both let the client know which files changed and which cache > entries are invalid.
the advantage of the changes file is that it requires no new rpcs at all so you can do it today
