(kgdb) info locals
zfsvfs = 0xffffffff00000000
sdzp = 0xffffffff81035726 <witness_unlock+1190>
tdzp = 0xfffffe08604c7330
szp = 0x286
tzp = 0xfffffe08604c72d0
zilog = 0x0
tx = 0xfffffe08604c7260
snm = 0xfffff800168f8405 "ecp.jOVPwNyt"
tnm = 0xfffff8001629c000 "cxgbei.ko.full"
error = 18
(kgdb) info args
sdvp = 0xfffff80016e331d8
svpp = 0xfffffe08604c7318
scnp = 0xfffffe08604c7750
tdvp = 0xfffff80156440000
tvpp = 0xfffffe08604c7308
tcnp = 0xfffffe08604c7688
cr = 0xfffff8001612e600
(kgdb) p *sdvp
$1 = {v_tag = 0xffffffff82d018e7 "zfs", v_op = 0xffffffff82d19bb0 <zfs_vnodeops>, v_data = 0xfffff80016a48e70, 
  v_mount = 0xfffff80016dda330, v_nmntvnodes = {tqe_next = 0xfffff80016e33000, tqe_prev = 0xfffff80016e333d0}, v_un = {
    vu_mount = 0x0, vu_socket = 0x0, vu_cdev = 0x0, vu_fifoinfo = 0x0}, v_hashlist = {le_next = 0x0, le_prev = 0x0}, 
  v_cache_src = {lh_first = 0xfffff80174d42ee0}, v_cache_dst = {tqh_first = 0x0, tqh_last = 0xfffff80016e33228}, 
  v_cache_dd = 0x0, v_lock = {lock_object = {lo_name = 0xffffffff82d018e7 "zfs", lo_flags = 117112832, lo_data = 0, 
      lo_witness = 0xfffffe00016ec300}, lk_lock = 1, lk_exslpfail = 0, lk_timo = 51, lk_pri = 96}, v_interlock = {
    lock_object = {lo_name = 0xffffffff81c42dd4 "vnode interlock", lo_flags = 16973824, lo_data = 0, 
      lo_witness = 0xfffffe00016dd580}, mtx_lock = 4}, v_vnlock = 0xfffff80016e33240, v_actfreelist = {
    tqe_next = 0xfffff80016e33000, tqe_prev = 0xfffff8005d933da8}, v_bufobj = {bo_lock = {lock_object = {
        lo_name = 0xffffffff81c4c0d4 "bufobj interlock", lo_flags = 86179840, lo_data = 0, 
        lo_witness = 0xfffffe00016e8900}, rw_lock = 1}, bo_ops = 0xffffffff821621d0 <buf_ops_bio>, 
    bo_object = 0xfffff8005d665948, bo_synclist = {le_next = 0x0, le_prev = 0x0}, bo_private = 0xfffff80016e331d8, 
    __bo_vnode = 0xfffff80016e331d8, bo_clean = {bv_hd = {tqh_first = 0x0, tqh_last = 0xfffff80016e332f8}, bv_root = {
        pt_root = 0}, bv_cnt = 0}, bo_dirty = {bv_hd = {tqh_first = 0x0, tqh_last = 0xfffff80016e33318}, bv_root = {
        pt_root = 0}, bv_cnt = 0}, bo_numoutput = 0, bo_flag = 0, bo_bsize = 131072}, v_pollinfo = 0x0, v_label = 0x0, 
  v_lockf = 0x0, v_rl = {rl_waiters = {tqh_first = 0x0, tqh_last = 0xfffff80016e33360}, rl_currdep = 0x0}, 
  v_cstart = 0, v_lasta = 0, v_lastw = 0, v_clen = 0, v_holdcnt = 4, v_usecount = 2, v_iflag = 512, v_vflag = 1, 
  v_writecount = 0, v_hash = 4, v_type = VDIR}
(kgdb) p *svpp
$2 = (vnode_t *) 0xfffff80174c02588
(kgdb) p *scnp
$3 = {cn_nameiop = 2, cn_flags = 67148812, cn_thread = 0xfffff8010b855a40, cn_cred = 0xfffff8001612e600, 
  cn_lkflags = 524288, cn_pnbuf = 0xfffff800168f8400 "/tmp/ecp.jOVPwNyt", 
  cn_nameptr = 0xfffff800168f8405 "ecp.jOVPwNyt", cn_namelen = 12}
(kgdb) p *tdvp
$4 = {v_tag = 0xffffffff82d018e7 "zfs", v_op = 0xffffffff82d19bb0 <zfs_vnodeops>, v_data = 0xfffff8015643c528, 
  v_mount = 0xfffff80016ddb990, v_nmntvnodes = {tqe_next = 0xfffff80156356000, tqe_prev = 0xfffff801564403d0}, v_un = {
    vu_mount = 0x0, vu_socket = 0x0, vu_cdev = 0x0, vu_fifoinfo = 0x0}, v_hashlist = {le_next = 0x0, le_prev = 0x0}, 
  v_cache_src = {lh_first = 0xfffff8017d7a55b0}, v_cache_dst = {tqh_first = 0xfffff80135701d90, 
    tqh_last = 0xfffff80135701db0}, v_cache_dd = 0xfffff80135701d90, v_lock = {lock_object = {
      lo_name = 0xffffffff82d018e7 "zfs", lo_flags = 117112832, lo_data = 0, lo_witness = 0xfffffe00016ec300}, 
    lk_lock = 18446735282104785472, lk_exslpfail = 0, lk_timo = 51, lk_pri = 96}, v_interlock = {lock_object = {
      lo_name = 0xffffffff81c42dd4 "vnode interlock", lo_flags = 16973824, lo_data = 0, 
      lo_witness = 0xfffffe00016dd580}, mtx_lock = 4}, v_vnlock = 0xfffff80156440068, v_actfreelist = {
    tqe_next = 0xfffff801563003b0, tqe_prev = 0xfffff801563560c0}, v_bufobj = {bo_lock = {lock_object = {
        lo_name = 0xffffffff81c4c0d4 "bufobj interlock", lo_flags = 86179840, lo_data = 0, 
        lo_witness = 0xfffffe00016e8900}, rw_lock = 1}, bo_ops = 0xffffffff821621d0 <buf_ops_bio>, 
    bo_object = 0xfffff80135aa9318, bo_synclist = {le_next = 0x0, le_prev = 0x0}, bo_private = 0xfffff80156440000, 
    __bo_vnode = 0xfffff80156440000, bo_clean = {bv_hd = {tqh_first = 0x0, tqh_last = 0xfffff80156440120}, bv_root = {
        pt_root = 0}, bv_cnt = 0}, bo_dirty = {bv_hd = {tqh_first = 0x0, tqh_last = 0xfffff80156440140}, bv_root = {
        pt_root = 0}, bv_cnt = 0}, bo_numoutput = 0, bo_flag = 0, bo_bsize = 131072}, v_pollinfo = 0x0, v_label = 0x0, 
  v_lockf = 0x0, v_rl = {rl_waiters = {tqh_first = 0x0, tqh_last = 0xfffff80156440188}, rl_currdep = 0x0}, 
  v_cstart = 0, v_lasta = 0, v_lastw = 0, v_clen = 0, v_holdcnt = 8, v_usecount = 6, v_iflag = 512, v_vflag = 0, 
  v_writecount = 0, v_hash = 272943, v_type = VDIR}
(kgdb) p *tvpp
$5 = (vnode_t *) 0xfffff8017d7d1ce8
(kgdb) p *tcpp
No symbol "tcpp" in current context.
(kgdb) p *tcnp
$6 = {cn_nameiop = 3, cn_flags = 134257708, cn_thread = 0xfffff8010b855a40, cn_cred = 0xfffff8001612e600, 
  cn_lkflags = 524288, cn_pnbuf = 0xfffff8001629c000 "cxgbei.ko.full", 
  cn_nameptr = 0xfffff8001629c000 "cxgbei.ko.full", cn_namelen = 14}
(kgdb) p *cr
$7 = {cr_ref = 264, cr_uid = 0, cr_ruid = 0, cr_svuid = 0, cr_ngroups = 2, cr_rgid = 0, cr_svgid = 0, 
  cr_uidinfo = 0xfffff800071c1380, cr_ruidinfo = 0xfffff800071c1380, cr_prison = 0xffffffff82148700 <prison0>, 
  cr_loginclass = 0xfffff80016a73180, cr_flags = 0, cr_pspare2 = {0x0, 0x0}, cr_label = 0x0, cr_audit = {
    ai_auid = 4294967295, ai_mask = {am_success = 0, am_failure = 0}, ai_termid = {at_port = 0, at_type = 4, 
      at_addr = {0, 0, 0, 0}}, ai_asid = 0, ai_flags = 0}, cr_groups = 0xfffff8001612e69c, cr_agroups = 16, 
  cr_smallgroups = {0, 5, 0 <repeats 14 times>}}