SMP kernel panic: cpuid mismatch

[Francois Tigeot <ftigeot@xxxxxxxxxxxx>]

Hi,

I'm not sure I should file a bug report since I got the impression the SMP
initialization code is not perfect and there could be a workaround.

Anyway, I just got a panic with a recent i386 SMP kernel (GENERIC + options
SMP and APIC_IO) on a Xeon Nehalem box.

The machine is based on a Supermicro X8DTL-iF mainboard
http://www.supermicro.nl/products/motherboard/QPI/5500/X8DTL-iF.cfm
with a single Xeon Nehalem E5530 (4 physical cores, 8 execution contexts)
and 12 GB memory.

I have copied the relevant part of the panic message:


DragonFly/MP: Multiprocessor motherboard
 cpu0 (BSP): apic id: 16, version 0x00060015
 cpu1 (AP) : apic id: 18, version 0x00060015
 cpu2 (AP) : apic id: 20, version 0x00060015
 cpu3 (AP) : apic id: 22, version 0x00060015
 cpu4 (AP) : apic id: 17, version 0x00060015
 cpu5 (AP) : apic id: 19, version 0x00060015
 cpu6 (AP) : apic id: 21, version 0x00060015
 cpu7 (AP) : apic id: 23, version 0x00060015
 io0 (APIC): apic id:  2, version 0x00170020, at 0xfec00000
 io0 (APIC): apic id:  4, version 0x00170020, at 0xfec8a000
APIC_IO: Testing 8254 interrupt delivery
APIC_IO: Testing 8254 via IOAPIC#0 intpin 2
SMP: AP CPU #4 Launched!
SMP: cpuid = 4
SMP: apic_id = -1
PTD[MPPTDI] = 0x8de023
panic: cpuid mismatch! boom!!
mp_lock = 00000004; cpuid = 4


-- 
Francois Tigeot