An unexpected IO-APIC was found

["John W. Sopko Jr." <sopko@cs.unc.edu>]

I have been having problems with my system locking up. I saw the 
following in /var/log/messages. I am running:

Red Hat Enterpise linux AS with the latest kernel, 2.4.21-9.0.1.ELsmp

It is a single P4 processor system running in hyperthread mode, that is 
itis running the smp kernel. Let me know if you want more info.


Mar 10 10:38:08 lark kernel: ESR value after enabling vector: 00000000
Mar 10 10:38:08 lark kernel: Booting processor 1/1 eip 2000
Mar 10 10:38:08 lark kernel: Initializing CPU#1
Mar 10 10:38:08 lark kernel: masked ExtINT on CPU#1
Mar 10 10:38:08 lark kernel: ESR value before enabling vector: 00000000
Mar 10 10:38:08 lark kernel: ESR value after enabling vector: 00000000
Mar 10 10:38:08 lark kernel: Calibrating delay loop... 5583.66 BogoMIPS
Mar 10 10:38:08 lark kernel: CPU: Trace cache: 12K uops, L1 D cache: 8K
Mar 10 10:38:08 lark kernel: CPU: L2 cache: 512K
Mar 10 10:38:08 lark kernel: CPU: Physical Processor ID: 0
Mar 10 10:38:08 lark kernel: Intel machine check reporting enabled on CPU#1.
Mar 10 10:38:08 lark rpc.statd[913]: Version 1.0.5 Starting
Mar 10 10:38:08 lark kernel: CPU1: Intel(R) Pentium(R) 4 CPU 2.80GHz 
stepping 09
Mar 10 10:38:08 lark kernel: Total of 2 processors activated (11154.22 
BogoMIPS).
Mar 10 10:38:08 lark kernel: ENABLING IO-APIC IRQs
Mar 10 10:38:08 lark kernel: Setting 2 in the phys_id_present_map
Mar 10 10:38:08 lark kernel: ...changing IO-APIC physical APIC ID to 2 
... ok.
Mar 10 10:38:08 lark nfslock: rpc.statd startup succeeded
Mar 10 10:38:08 lark kernel: ..TIMER: vector=0x31 pin1=-1 pin2=0
Mar 10 10:38:08 lark kernel: ...trying to set up timer (IRQ0) through 
the 8259A ...
Mar 10 10:38:08 lark kernel: ..... (found pin 0) ...works.
Mar 10 10:38:08 lark kernel: testing the IO APIC.......................
Mar 10 10:38:08 lark kernel:
Mar 10 10:38:08 lark kernel: An unexpected IO-APIC was found. If this 
kernel release is less than
Mar 10 10:38:08 lark kernel: three months old please report this to 
linux-smp@vger.kernel.org
Mar 10 10:38:08 lark kernel: .................................... done.
Mar 10 10:38:08 lark kernel: Using local APIC timer interrupts.
Mar 10 10:38:08 lark kernel: calibrating APIC timer ...
Mar 10 10:38:08 lark kernel: ..... CPU clock speed is 2793.2953 MHz.
Mar 10 10:38:08 lark kernel: ..... host bus clock speed is 199.5208 MHz.
Mar 10 10:38:08 lark kernel: cpu: 0, clocks: 1995208, slice: 665069
Mar 10 10:38:08 lark kernel: 
CPU0<T0:1995200,T1:1330128,D:3,S:665069,C:1995208>
Mar 10 10:38:08 lark kernel: cpu: 1, clocks: 1995208, slice: 665069
Mar 10 10:38:08 lark kernel: 
CPU1<T0:1995200,T1:665056,D:6,S:665069,C:1995208>
Mar 10 10:38:08 lark kernel: cpu_sibling_map[0] = 1
Mar 10 10:38:08 lark kernel: cpu_sibling_map[1] = 0
Mar 10 10:38:08 lark kernel: mapping CPU#0's runqueue to CPU#1's runqueue.
Mar 10 10:38:08 lark kernel: zapping low mappings.
Mar 10 10:38:08 lark kernel: Starting migration thread for cpu 0
Mar 10 10:38:08 lark kernel: Starting migration thread for cpu 1

-- 
John W. Sopko Jr.               University of North Carolina
email: sopko AT cs.unc.edu      Computer Science Dept., CB 3175
Phone: 919-962-1844             Sitterson Hall; Room 044
Fax:   919-962-1799             Chapel Hill, NC 27599-3175