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SubjectUnknown interrupt

I just noticed that 2.1.90 (my first SMP kernel with SMP board) -> 2.1.93
give:

Apr 7 20:43:55 moving kernel: Linux version 2.1.93 (root@moving) (gcc
version 2.8.1) #3 SMP Tue Apr 7 19:19:11 EDT 1998
Apr 7 20:43:55 moving kernel: Unknown interrupt
Apr 7 21:16:13 moving kernel: Intel MultiProcessor Specification v1.1
Apr 7 21:16:13 moving kernel: Virtual Wire compatibility mode.

Doesn't look harmful but probably shouldn't be there...

Full 2.1.93 listing on a Tyan Tomcat IVD with two Pentium 133's:

Loaded 5234 symbols from /usr/src/linux/System.map.
Symbols match kernel version.
Linux version 2.1.93 (root@moving) (gcc version 2.8.1) #3 SMP Tue Apr 7 19:19:11 EDT 1998
Unknown interrupt
Intel MultiProcessor Specification v1.1
Virtual Wire compatibility mode.
OEM ID: OEM00000 Product ID: PROD00000000 APIC at: 0xFEE00000
Processor #0 Pentium(tm) APIC version 17
Processor #1 Pentium(tm) APIC version 17
I/O APIC #2 Version 17 at 0xFEC00000.
Processors: 2
IO APIC ID: 0
APIC ID: 0
INIT IRQ
Console: 16 point font, 400 scans
Console: colour VGA+ 80x25, 1 virtual console (max 63)
Calibrating delay loop... 52.84 BogoMIPS
Memory: 63424k/65536k available (716k kernel code, 400k reserved, 964k data, 32k init)
Swansea University Computer Society NET3.039 for Linux 2.1
NET3: Unix domain sockets 0.16 for Linux NET3.038.
Swansea University Computer Society TCP/IP for NET3.037
IP Protocols: ICMP, UDP, TCP
Initializing RT netlink socket
VFS: Diskquotas version dquot_5.6.0 initialized

Checking 386/387 coupling... Ok, fpu using exception 16 error reporting.
Checking 'hlt' instruction... Ok.
Intel Pentium with F0 0F bug - workaround enabled.
POSIX conformance testing by UNIFIX
CPU0: Intel Pentium 75+ stepping 0c
calibrating APIC timer ...
..... CPU clock speed is 132.5488 MHz.
..... APIC bus clock speed is 66.2742 MHz.
Booting processor 1 eip 2000: Calibrating delay loop... 52.84 BogoMIPS
OK.
CPU1: Intel Pentium 75+ stepping 0c
Total of 2 processors activated (105.68 BogoMIPS).
enabling Symmetric IO mode ... ...done.
ENABLING IO-APIC IRQs
init IO_APIC IRQs
IO-APIC pin 0, 20, 21, 22, 23 not connected.
nr of MP irq sources: 21.
nr of IOAPIC registers: 24.
testing the IO APIC.......................
.... register #00: 02000000
....... : physical APIC id: 02
.... register #01: 00170011
....... : max redirection entries: 0017
....... : IO APIC version: 0011
.... register #02: 00000000
....... : arbitration: 00
.... IRQ redirection table:
NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect:
00 000 00 1 0 0 0 0 0 0 00
01 0FF 0F 0 0 0 0 0 1 1 59
02 0FF 0F 0 0 0 0 0 1 1 51
03 0FF 0F 0 0 0 0 0 1 1 69
04 0FF 0F 0 0 0 0 0 1 1 71
05 0FF 0F 0 0 0 0 0 1 1 79
06 0FF 0F 0 0 0 0 0 1 1 81
07 0FF 0F 0 0 0 0 0 1 1 89
08 0FF 0F 0 0 0 0 0 1 1 91
09 0FF 0F 0 0 0 0 0 1 1 99
0a 0FF 0F 0 0 0 0 0 1 1 A1
0b 0FF 0F 0 0 0 0 0 1 1 A9
0c 0FF 0F 0 0 0 0 0 1 1 B1
0d 000 00 1 0 0 0 0 0 0 00
0e 0FF 0F 0 0 0 0 0 1 1 C1
0f 0FF 0F 0 0 0 0 0 1 1 C9
10 0FF 0F 0 1 0 1 0 1 1 D1
11 0FF 0F 0 1 0 1 0 1 1 D9
12 0FF 0F 0 1 0 1 0 1 1 E1
13 0FF 0F 0 1 0 1 0 1 1 E9
14 000 00 1 0 0 0 0 0 0 00
15 000 00 1 0 0 0 0 0 0 00
16 000 00 1 0 0 0 0 0 0 00
17 000 00 1 0 0 0 0 0 0 00
.................................... done.
PCI: BIOS32 Service Directory structure at 0xc00fb0d0
PCI: BIOS32 Service Directory entry at 0xfb570
PCI: PCI BIOS revision 2.10 entry at 0xfb5a0
PCI: Probing PCI hardware.
PCI->APIC IRQ transform: (B0,I7,P3) -> -1
Starting kswapd v 1.5
Serial driver version 4.24 with SHARE_IRQ enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
ttyS01 at 0x02f8 (irq = 3) is a 16550A
APM disabled: APM is not SMP safe.
Real Time Clock Driver v1.09
PIIX3: IDE controller on PCI bus 00 dev 39
PIIX3: not 100ative mode: will probe irqs later
ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:pio, hdb:pio
ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:pio, hdd:pio
hda: Maxtor 71000 A, ATA DISK drive
hdc: CD820E.1v0789108, ATAPI CDROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: Maxtor 71000 A, 958MB w/64kB Cache, CHS=1946/16/63, DMA
md driver 0.36.6 MAX_MD_DEV=4, MAX_REAL=8
md: starting 4 kernel threads
Partition check:
hda: hda1 hda2 hda3 hda4
VFS: Mounted root (ext2 filesystem) readonly.
Starting kmod
Freeing unused kernel memory: 32k freed

Devices (since /proc/bus/pci doesn't exist, I'll use /proc/pci):

Bus 0, device 0, function 0:
Host bridge: Intel 82439HX Triton II (rev 3).
Medium devsel. Master Capable. Latency=32.
Bus 0, device 7, function 0:
ISA bridge: Intel 82371SB PIIX3 ISA (rev 1).
Medium devsel. Fast back-to-back capable. Master Capable. No bursts.
Bus 0, device 7, function 1:
IDE interface: Intel 82371SB PIIX3 IDE (rev 0).
Medium devsel. Fast back-to-back capable. Master Capable. Latency=32.
I/O at 0xf000 [0xf001].
Bus 0, device 7, function 2:
USB Controller: Intel 82371SB PIIX3 USB (rev 1).
Medium devsel. Fast back-to-back capable. IRQ b. Master Capable. Latency=32.
I/O at 0x6000 [0x6001].
Bus 0, device 18, function 0:
VGA compatible controller: Cirrus Logic GD 5430 (rev 71).
Medium devsel.
Prefetchable 32 bit memory at 0xe0000000 [0xe0000008].

CPU0 CPU1
0: 87837 162833 IO-APIC timer
1: 4968 11362 IO-APIC keyboard
2: 0 0 XT PIC cascade
3: 20413 60949 IO-APIC serial
4: 547 2245 IO-APIC serial
8: 0 1 IO-APIC rtc
13: 5 0 XT PIC fpu
14: 15454 16771 IO-APIC ide0
15: 0 2 IO-APIC ide1
NMI: 0
IPI: 0

Too bad it doesn't say which interrupt number it received.
(And I don't do asm well enough to try.)

-George


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