df2420rig: port 1 drained - holding 31 ata_xfers, ap_ccb_free is now EMPTY
Fatal user address access from kernel mode from ahcipoc at ffffffff80306816


Fatal trap 12: page fault while in kernel mode
cpuid = 4; lapic id = 4
fault virtual address	= 0x0
fault code		= supervisor read data, page not present
instruction pointer	= 0x8:0xffffffff80306816
stack pointer	        = 0x10:0xfffff80118a315d8
frame pointer	        = 0x10:0xfffff80118a31628
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 0, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 820
current thread          = pri 6 
kernel: type 12 trap, code=0

CPU4 stopping CPUs: 0x0000002f
 stopped
Stopped at      ahci_xpt_action+0x2d6:  movq    (%rax),%rax
db>