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. 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? > > 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