On Aug 4, 2010, at 3:21 PM, Yudong Gao wrote: > Hi, > > I am not able to find the implementation of directory delegation, > either. Similarly, the callback functions CB_NOTIFY is not > implemented, either. I find that in preprocss_nfs41_op() in > callback_xdr.c, whenever a CB_NOTIFY is encountered, an > NFS4ERR_NOTSUPP is returned directly. CB_NOTIFY is not currently supported on the Linux NFS client. > > Am I missing something? Or they are just not supported in the current version? > > Thanks a lot! > > best, > > Yudong > > On Mon, Aug 2, 2010 at 5:17 PM, Yudong Gao <stgyd@xxxxxxxxx> wrote: >> Hi, >> >> I am looking at the delegation implementation in the source code of >> NFS 4.1 in kernel 2.6.32.15. I can find the code for read delegation, >> which is working and can serve the read requests locally. But I can >> never find the code about write delegation, which is supposed to cache >> the write update locally. I try to look at the functions including >> nfs_writepage(s), nfs_file_flush() but none of them checks or uses the >> write delegation. >> >> Is write delegation currently implemented in NFS 4.1? Write delegation is supported but I don't think write behavior changes - writes are still cached and flushed as without a write delegation. The write delegation does prevent open/close and lock/locku from being put on the wire. -->Andy >> >> Thanks! >> >> best, >> >> Yudong >> > -- > 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 -- 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
