page fault panic in AcpiHwLowLevelRead on reboot

Hi,

Got this double panic after the classic "kmem_map too small" , I have 
auto dump and reboot on. This is on a four way IBM box with -CURRENT 
from today.

panic: kmem_malloc(16384): kmem_map too small: 335544320 total allocated
cpuid = 1
...
sched_sync(0,e51bbd48,0,0,0) at sched_sync+0x48e
fork_exit(c057c1a0,0,e51bbd48) at fork_exit+0x80
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xe51bbd7c, ebp = 0 ---
boot() called on cpu#1
Uptime: 47m48s
Dumping 1023 MB
  16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 256 272 288 304 
320 336 352 368 384 400 416 432 448 464 480 496 512 528 544 560 576 592 
608 624 640 656 672 688 704 720 736 752 768 784 800 816 832 848 864 880 
896 912 928 944 960 976 992 1008
Dump complete
Shutting down ACPI
oAeurnteolm attrapi c12  rweibtho iontt eirrnup t1s5 di sabsleecd
  n
s
tFat al-  trappr 12e: pages sfault w hile ain k erkneeyl  omnode
  chpuei d c=o n2;s apic oilde = 0 6
dautlot  vairbtouarl tad
  ress   = 0x9c
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc07f97d9
stack pointer           = 0x10:0xe337bc48
frame pointer           = 0x10:0xe337bc68
code segment            = base 0x0, limit 0xfffff, type 0x1b
                         = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 12 (idle: cpu2)
[thread 100005]
Stopped at      AcpiHwLowLevelRead+0x19:        movl    0x8(%ecx),%eax
db> tr
AcpiHwLowLevelRead(10,e337bc84,94,24eca0,0) at AcpiHwLowLevelRead+0x19
AcpiHwRegisterRead(0,1,e337bca4,0,0) at AcpiHwRegisterRead+0x71
AcpiGetRegister(1,e337bcd0,0,e03266ea,c22616e0) at AcpiGetRegister+0x63
acpi_cpu_idle(e337bd10,c04f710a,1,0,0) at acpi_cpu_idle+0x9b
cpu_idle(1,0,0,0,0) at cpu_idle+0x28
idle_proc(0,e337bd48,0,0,0) at idle_proc+0x1a
fork_exit(c04f70f0,0,e337bd48) at fork_exit+0x80
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xe337bd7c, ebp = 0 ---
db>

-- 
Pawel