On Mon, 2010-07-12 at 15:00 -0700, Yudong Gao wrote: > Hi Trond, > > Thanks for the prompt reply! > > I find that in _nfs_do_open(), _nfs4_proc_open(), which do the RPC > call to the remote server, is always called before > nfs4_opendata_to_nfs4_state(), which will further invoke > nfs4_try_open_cached(). > > Does this means that whenever is file is opened, the client always > need to talk to the server first? The actual RPC call is skipped if the call to can_open_cached() succeeds in nfs4_open_prepare(). In that case, we just grab the sequence, which ensures that we remain serialised w.r.t. CLOSE and OPEN_DOWNGRADE calls. Trond -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
