KERN: nfs: mount(6, <NULL>, 00000000)
KERN: nfs: nfs_params: nfs:10.81.0.254:/usr/cvs/pkgsrc,uid=1992313254,gid=0,hostname=shredder
KERN: nfs:ip!
KERN: IP:10.81.0.254
KERN: nfs:hn!
KERN: nfs:uid!
KERN: nfs:gid!
KERN: nfs: ip:0a5100fe server:'10.81.0.254' export:'/usr/cvs/pkgsrc' hostname:'shredder' uid=1992313254 gid=0 
KERN: nfs: mountd at fe00510a:1022
KERN: nfs: nfsd at fe00510a:2049
KERN: PANIC: dec_vnode_ref_count: called on busy vnode 0xffffffff9da6c380
KERN: 
KERN: Welcome to Kernel Debugging Land...
KERN: Thread 2181 "touch" running on CPU 2
KERN: stack trace for thread 2181 "touch"
KERN:     kernel stack: 0xffffffff91e7a000 to 0xffffffff91e7f000
KERN:       user stack: 0x00007f4d782e5000 to 0x00007f4d792e5000
KERN: frame                       caller             <image>:function + offset
KERN:  0 ffffffff91e7ec58 (+  24) ffffffff8014247c   <kernel_x86_64> arch_debug_call_with_fault_handler + 0x16
KERN:  1 ffffffff91e7ec70 (+  80) ffffffff800a81c8   <kernel_x86_64> debug_call_with_fault_handler + 0x88
KERN:  2 ffffffff91e7ecc0 (+  96) ffffffff800a9b51   <kernel_x86_64> kernel_debugger_loop(char const*, char const*, __va_list_tag*, int) + 0xf1
KERN:  3 ffffffff91e7ed20 (+  80) ffffffff800a9e4e   <kernel_x86_64> kernel_debugger_internal(char const*, char const*, __va_list_tag*, int) + 0x6e
KERN:  4 ffffffff91e7ed70 (+ 240) ffffffff800aa1b7   <kernel_x86_64> panic + 0xb7
KERN:  5 ffffffff91e7ee60 (+  80) ffffffff800f9f0f   <kernel_x86_64> dec_vnode_ref_count(vnode*, bool, bool) + 0x15f
KERN:  6 ffffffff91e7eeb0 (+  32) ffffffff800e9944   <kernel_x86_64> put_fd + 0x84
KERN:  7 ffffffff91e7eed0 (+  80) ffffffff800e9c70   <kernel_x86_64> close_fd_index + 0xc0
KERN:  8 ffffffff91e7ef20 (+  16) ffffffff80143f04   <kernel_x86_64> x86_64_syscall_entry + 0xfe
KERN: user iframe at 0xffffffff91e7ef30 (end = 0xffffffff91e7eff8)
KERN:  rax 0x97                  rbx 0x0                   rcx 0x1ff1d374d21
KERN:  rdx 0x0                   rsi 0x0                   rdi 0x0
KERN:  rbp 0x7f4d792e4bd0         r8 0x80                   r9 0x30
KERN:  r10 0x7f4d792e4a00        r11 0x3206                r12 0x7f4d792e5776
KERN:  r13 0xc60d268408          r14 0x792e5700            r15 0x0
KERN:  rip 0x1ff1d374d21         rsp 0x7f4d792e4bb8     rflags 0x3206
KERN:  vector: 0x63, error code: 0x0
KERN:  9 ffffffff91e7ef30 (+139972569357472) 000001ff1d374d21   <libroot.so> _kern_close + 0x09
KERN: 10 00007f4d792e4bd0 (+ 256) 000000c60d052adc   <touch> main + 0x2ec
KERN: 11 00007f4d792e4cd0 (+  48) 000000c60d053231   <touch> _start + 0x51
KERN: 12 00007f4d792e4d00 (+  48) 0000010273c0e485   </boot/system/runtime_loader@0x0000010273bfa000> <unknown> + 0x14485
KERN: 13 00007f4d792e4d30 (+   0) 00007ffe324f2260   <commpage> commpage_thread_exit + 0x00
KERN: kdebug> coKERN: slab memory manager: created area 0xffffffff9e001000 (19206)