Fatal trap 9: general protection fault while in kernel mode
cpuid = 0; lapic id = 0
instruction pointer	= 0x8:0xffffffff806dea20
stack pointer	        = 0x10:0xfffff8011p7aan1bi6fc8 
wi
tStopped at      cache_nlookup_maybe_shared+0x100:       cmpq    %rax,0x48(%rbx)
db>