login: vn0: MBR magic not found; assume a COMPATIBILITY_SLICE (s0)
vn0: MBR magic not found; assume a COMPATIBILITY_SLICE (s0)
panic: lockmgr: locking against myself
cpuid = 5
Trace beginning at frame 0xfffff80117abb138
lockmgr_exclusive() at lockmgr_exclusive+0x3e0 0xffffffff80647f30 
lockmgr_exclusive() at lockmgr_exclusive+0x3e0 0xffffffff80647f30 
getblk() at getblk+0xe1 0xffffffff806d6f91 
breadnx() at breadnx+0x284 0xffffffff806d7714 
ext2_blkatoff() at ext2_blkatoff+0x58 0xffffffff8260a1e8 
ext2_htree_find_leaf() at ext2_htree_find_leaf+0x1e5 0xffffffff82605ac5 
Debugger("panic")

CPU5 stopping CPUs: 0x0000001f
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
db>