9p server, current ftrace output (trace_pipe)

 1)               |  v9fs_mount [9p]() {
 1)               |    v9fs_session_init [9p]() {
 1)   0.613 us    |      v9fs_get_trans_by_name [9pnet]();
 1)               |      /* 9p_protocol_dump: clnt 18446612133632688128 P9_TVERSION(tag = 65535)
000: 13 00 00 00 64 ff ff 00 02 00 00 06 00 39 50 32
010: 30 30 30 6a 6e 68 70 67 0e 00 00 00 65 76 65 6e
 */
 1)               |      /* 9p_client_req: client 18446612133632688128 request P9_TVERSION tag  65535 */
 0)               |  /* 9p_protocol_dump: clnt 18446612133632688128 P9_RVERSION(tag = 65535)
000: 13 00 00 00 65 ff ff 00 02 00 00 06 00 39 50 32
010: 30 30 30 b4 f1 c1 dc 18 f0 84 e4 34 42 58 0e af
 */
 0)               |  /* 9p_client_res: client 18446612133632688128 response P9_TVERSION tag  65535 err 0 */
 0)               |  /* 9p_protocol_dump: clnt 18446612133632688128 P9_TATTACH(tag = 1)
000: 1a 00 00 00 68 01 00 00 00 00 00 ff ff ff ff 07
010: 00 61 6e 64 72 65 61 73 00 00 00 00 65 76 65 6e
 */
 0)               |  /* 9p_client_req: client 18446612133632688128 request P9_TATTACH tag  1 */
 0)               |  /* 9p_protocol_dump: clnt 18446612133632688128 P9_RATTACH(tag = 1)
000: 14 00 00 00 69 01 00 00 00 00 00 00 00 00 00 00
010: 00 00 00 80 6e 68 70 67 0e 00 00 00 65 76 65 6e
 */
 0)               |  /* 9p_client_res: client 18446612133632688128 response P9_TATTACH tag  1 err 0 */
 0)   2.010 us    |      v9fs_cache_session_get_cookie [9p]();
 0) # 9226.507 us |    } /* v9fs_session_init [9p] */
 0)   1.623 us    |    v9fs_set_super [9p]();
 0)               |    v9fs_get_inode [9p]() {
 0)   0.184 us    |      v9fs_alloc_inode [9p]();
 0)   0.160 us    |      v9fs_init_inode [9p]();
 0)   1.626 us    |    }
 0)               |  /* 9p_protocol_dump: clnt 18446612133632688128 P9_TSTAT(tag = 1)
000: 0b 00 00 00 7c 01 00 00 00 00 00 ff ff ff ff 07
010: 00 61 6e 64 72 65 61 73 00 00 00 00 65 76 65 6e
 */
 0)               |  /* 9p_client_req: client 18446612133632688128 request P9_TSTAT tag  1 */
 0)               |  /* 9p_protocol_dump: clnt 18446612133632688128 P9_RSTAT(tag = 1)
000: 45 00 00 00 7d 01 00 44 00 be ef da c0 ff ee 00
010: 00 00 00 00 00 00 00 00 00 00 00 80 9a 02 00 80
 */
 0)               |  /* 9p_client_res: client 18446612133632688128 response P9_TSTAT tag  1 err 0 */
 0)               |  /* 9p_protocol_dump: clnt 18446612133632688128 P9_RSTAT(tag = 1)
000: 45 00 00 00 7d 01 00 44 00 be ef da c0 ff ee 00
010: 00 00 00 00 00 00 00 00 00 00 00 80 9a 02 00 80
 */
 0)               |  /* 9p_protocol_dump: clnt 18446612133632688128 P9_TCLUNK(tag = 1)
000: 0b 00 00 00 78 01 00 00 00 00 00 ff ff ff ff 07
010: 00 61 6e 64 72 65 61 73 00 00 00 00 65 76 65 6e
 */
 0)               |  /* 9p_client_req: client 18446612133632688128 request P9_TCLUNK tag  1 */
 0)               |  /* 9p_protocol_dump: clnt 18446612133632688128 P9_RCLUNK(tag = 1)
000: 07 00 00 00 79 01 00 44 00 be ef da c0 ff ee 00
010: 00 00 00 00 00 00 00 00 00 00 00 80 9a 02 00 80
 */
 0)               |  /* 9p_client_res: client 18446612133632688128 response P9_TCLUNK tag  1 err 0 */
 0)               |    v9fs_kill_super [9p]() {
 0)               |      v9fs_evict_inode [9p]() {
 0)   0.180 us    |        v9fs_cache_inode_put_cookie [9p]();
 0)   2.637 us    |      }
 0)   0.096 us    |      v9fs_destroy_inode [9p]();
 0)   0.089 us    |      v9fs_dentry_release [9p]();
 0)   0.061 us    |      v9fs_session_cancel [9p]();
 0)               |      v9fs_session_close [9p]() {
 0)   0.167 us    |        v9fs_put_trans [9pnet]();
 0)   0.938 us    |        v9fs_cache_session_put_cookie [9p]();
 0) + 66.088 us   |      }
 0) + 92.519 us   |    }
 0) # 19414.90 us |  } /* v9fs_mount [9p] */