unexpected IO-APIC

["Jörg Lübbert" <j.luebbert@login-lanstation.de>]

Hello,

The reason of my writing is that an error message of our webserver asked 
me to do so.

We're running a dual Opteron system and when booting up, the following 
error is shown. It's in no way critical to the operation of the system. 
Everything works normal.

Output of dmesg:
IO APIC #3......
.... register #00: 03000000
.......    : physical APIC id: 03
.......    : Delivery Type: 0
.......    : LTS          : 0
.... register #01: 00030011
.......     : max redirection entries: 0003
An unexpected IO-APIC was found. If this kernel release is less than
three months old please report this to linux-smp@vger.kernel.org
.......     : PRQ implemented: 0
.......     : IO APIC version: 0011
.... register #02: 00000000
.......     : arbitration: 00
.... IRQ redirection table:
  NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect:
  00 003 03  1    1    0   1   0    1    1    99
  01 003 03  1    1    0   1   0    1    1    A1
  02 000 00  1    0    0   0   0    0    0    00
  03 000 00  1    0    0   0   0    0    0    00

IO APIC #4......
.... register #00: 04000000
.......    : physical APIC id: 04
.......    : Delivery Type: 0
.......    : LTS          : 0
.... register #01: 00030011
.......     : max redirection entries: 0003
An unexpected IO-APIC was found. If this kernel release is less than
three months old please report this to linux-smp@vger.kernel.org
.......     : PRQ implemented: 0
.......     : IO APIC version: 0011
.... register #02: 00000000
.......     : arbitration: 00
.... IRQ redirection table:
  NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect:
  00 003 03  1    1    0   1   0    1    1    A9
  01 000 00  1    0    0   0   0    0    0    00
  02 000 00  1    0    0   0   0    0    0    00
  03 000 00  1    0    0   0   0    0    0    00
IRQ to pin mappings:
IRQ0 -> 0:2
IRQ1 -> 0:1
IRQ3 -> 0:3
IRQ4 -> 0:4
IRQ6 -> 0:6
IRQ7 -> 0:7
IRQ8 -> 0:8
IRQ12 -> 0:12
IRQ13 -> 0:13
IRQ14 -> 0:14
IRQ15 -> 0:15
IRQ18 -> 0:18
IRQ19 -> 0:19
IRQ24 -> 1:0
IRQ25 -> 1:1
IRQ28 -> 2:0
.................................... done.
Using local APIC timer interrupts.
calibrating APIC timer ...
..... CPU clock speed is 1395.6556 MHz.
..... host bus clock speed is 199.3792 MHz.
cpu: 0, clocks: 1993792, slice: 664597
CPU0<T0:1993792,T1:1329184,D:11,S:664597,C:1993792>
cpu: 1, clocks: 1993792, slice: 664597
CPU1<T0:1993792,T1:664592,D:6,S:664597,C:1993792>


Output of /proc/pci:
PCI devices found:
   Bus  0, device   6, function  0:
     PCI bridge: Advanced Micro Devices [AMD] AMD-8111 PCI (rev 7).
       Master Capable.  Latency=64.  Min Gnt=11.
   Bus  0, device   7, function  0:
     ISA bridge: Advanced Micro Devices [AMD] AMD-8111 LPC (rev 5).
   Bus  0, device   7, function  1:
     IDE interface: Advanced Micro Devices [AMD] AMD-8111 IDE (rev 3).
       Master Capable.  Latency=32.
       I/O at 0xffa0 [0xffaf].
   Bus  0, device   7, function  2:
     SMBus: Advanced Micro Devices [AMD] AMD-8111 SMBus 2.0 (rev 2).
       IRQ 19.
       Master Capable.  Latency=64.
       I/O at 0xcc00 [0xcc1f].
   Bus  0, device   7, function  3:
     Bridge: Advanced Micro Devices [AMD] AMD-8111 ACPI (rev 5).
       Master Capable.  Latency=64.
   Bus  0, device  11, function  0:
     PCI bridge: Advanced Micro Devices [AMD] AMD-8131 PCI-X Bridge (#2) 
(rev 18).
       Master Capable.  Latency=64.  Min Gnt=5.
   Bus  0, device  10, function  0:
     PCI bridge: Advanced Micro Devices [AMD] AMD-8131 PCI-X Bridge (rev 
18).
       Master Capable.  Latency=64.  Min Gnt=5.
   Bus  0, device  11, function  1:
     PIC: Advanced Micro Devices [AMD] AMD-8131 PCI-X APIC (#2) (rev 1).
       Non-prefetchable 64 bit memory at 0xfebff000 [0xfebfffff].
   Bus  0, device  10, function  1:
     PIC: Advanced Micro Devices [AMD] AMD-8131 PCI-X APIC (rev 1).
       Non-prefetchable 64 bit memory at 0xfebfe000 [0xfebfefff].
   Bus  0, device  25, function  0:
     Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge (#2) (rev 0).
   Bus  0, device  24, function  0:
     Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge (rev 0).
   Bus  0, device  25, function  1:
     Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge (#2) (rev 0).
   Bus  0, device  24, function  1:
     Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge (rev 0).
   Bus  0, device  25, function  2:
     Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge (#2) (rev 0).
   Bus  0, device  24, function  2:
     Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge (rev 0).
   Bus  0, device  25, function  3:
     Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge (#2) (rev 0).
   Bus  0, device  24, function  3:
     Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge (rev 0).
   Bus  3, device   0, function  1:
     USB Controller: Advanced Micro Devices [AMD] AMD-8111 USB (#2) (rev 
11).
       IRQ 19.
       Master Capable.  Latency=64.  Max Lat=80.
       Non-prefetchable 32 bit memory at 0xfeafe000 [0xfeafefff].
   Bus  3, device   0, function  0:
     USB Controller: Advanced Micro Devices [AMD] AMD-8111 USB (rev 11).
       IRQ 19.
       Master Capable.  Latency=64.  Max Lat=80.
       Non-prefetchable 32 bit memory at 0xfeafd000 [0xfeafdfff].
   Bus  3, device   6, function  0:
     VGA compatible controller: ATI Technologies Inc Rage XL (rev 39).
       IRQ 18.
       Master Capable.  Latency=64.  Min Gnt=8.
       Non-prefetchable 32 bit memory at 0xfd000000 [0xfdffffff].
       I/O at 0xb800 [0xb8ff].
       Non-prefetchable 32 bit memory at 0xfeaff000 [0xfeafffff].
   Bus  2, device   9, function  1:
     Ethernet controller: Broadcom Corporation NetXtreme BCM5704 Gigabit 
Ethernet (#2) (rev 3).
       IRQ 25.
       Master Capable.  Latency=64.  Min Gnt=64.
       Non-prefetchable 64 bit memory at 0xfc9f0000 [0xfc9fffff].
       Non-prefetchable 64 bit memory at 0xfc9e0000 [0xfc9effff].
   Bus  2, device   9, function  0:
     Ethernet controller: Broadcom Corporation NetXtreme BCM5704 Gigabit 
Ethernet (rev 3).
       IRQ 24.
       Master Capable.  Latency=64.  Min Gnt=64.
       Non-prefetchable 64 bit memory at 0xfc9c0000 [0xfc9cffff].
       Non-prefetchable 64 bit memory at 0xfc9b0000 [0xfc9bffff].
   Bus  1, device   3, function  0:
     RAID bus controller: Mylex Corporation AcceleRAID 352/170/160 
support Device (rev 2).
       IRQ 28.
       Master Capable.  Latency=64.
       Prefetchable 32 bit memory at 0xf8000000 [0xfbffffff].


And /proc/cpuinfo:
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 5
model name      : AMD Opteron(tm) Processor 240
stepping        : 1
cpu MHz         : 1395.566
cache size      : 1024 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall mmxext lm 3dnowext 
3dnow
bogomips        : 2785.28

processor       : 1
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 5
model name      : AMD Opteron(tm) Processor 240
stepping        : 1
cpu MHz         : 1395.566
cache size      : 1024 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall mmxext lm 3dnowext 
3dnow
bogomips        : 2785.28


/proc/interrupts:
            CPU0       CPU1
   0:       6367   57762577    IO-APIC-edge  timer
   1:          0          2    IO-APIC-edge  keyboard
   2:          0          0          XT-PIC  cascade
   8:          0          2    IO-APIC-edge  rtc
  14:          0          5    IO-APIC-edge  ide0
  24:      11190   12976248   IO-APIC-level  eth1
  25:    2888250   10136461   IO-APIC-level  eth0
  28:        285    1874139   IO-APIC-level  Mylex AcceleRAID 352
NMI:          0          0
LOC:   57771145   57771143
ERR:          0
MIS:          0


Do you want to look further into this issue? Can I help you with this?

Cheers

- Jörg Lübbert

-- 
Login Lanstation GmbH
Technische Abteilung
www.login-lanstation.de