login: panic: brelse: inappropriate B_PAGING or B_CLUSTER bp 0xfffff8004f3df690
cpuid = 2
Trace beginning at frame 0xfffff8008d1f4810
brelse() at brelse+0x7f2 0xffffffff806d3ed2 
brelse() at brelse+0x7f2 0xffffffff806d3ed2 
mbrinit() at mbrinit+0x1ae 0xffffffff80b96e8e 
disk_probe() at disk_probe+0x85 0xffffffff80693785 
disk_msg_core() at disk_msg_core+0x252 0xffffffff80693dc2 
Debugger("panic")

CPU2 stopping CPUs: 0x0000003b
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
db>