I did a test to write 100 blocks using dd with and without oflag="sync" and saw the same result in wireshark, namely of getting a WRITE-COMMIT sequence. However it seems to me that this sequence is because of the nfs writeback code rather than vfs_write(). In Lucid, it appears that vfs_write() does not explicitly wait on a COMMIT to finish nor does it send stable=FILE_SYNC for a WRITE operation. So, I think that the expected synchronous behavior of O_SYNC flag or sync mounts is not seen in Lucid.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/709392 Title: NFS client does not submit "nfs_file_sync" write requests when the file open call includes O_SYNC. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
