RE: Kernel Errors

Thanks a lot for the information. I was worried about the message initially
since there was no proper information when I tried to google the error.

Regards

Samuel Victor

-----Original Message-----
From: Randy.Dunlap [mailto:rddunlap@xxxxxxxx]
Sent: Tuesday, March 15, 2005 2:28 PM
To: Victor, Samuel
Cc: linux-smp@xxxxxxxxxxxxxxx
Subject: Re: Kernel Errors


Hi-

Must be a 2.4.x kernel.... 2.6 kernels don't print these messages.

There is no issue to debug unless there are some other errors
besides these "Unexpected IO-APIC" messages.

More info:
Several of these messages have been "fixed"
in later versions of 2.4 and eliminated in Linux 2.6.
They are informational only and don't affect the operations of Linux.

They come from Linux having a known-valid list of IO APIC devices
and that list not being updated very often (hence the message
removal in Linux 2.6).


samuel.victor@xxxxxxx wrote:
> All
>     The following is the dmesg output in one of the Linux Servers we are
> using. The server is IBM xServer 325 based on the AMD Opteron Processor.
> Kindly let us know how to debug this issue
> 
> IO APIC #2......
> .... register #00: 02000000
> .......    : physical APIC id: 02
> .......    : 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@xxxxxxxxxxxxxxx
> .......     : 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:
>  00 001 01  1    1    0   1   0    1    1    B9
>  01 001 01  1    1    0   1   0    1    1    C1
>  02 001 01  1    1    0   1   0    1    1    C9
>  03 000 00  1    0    0   0   0    0    0    00
> 
> 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@xxxxxxxxxxxxxxx
> .......     : 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:
>  00 000 00  1    0    0   0   0    0    0    00
>  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

Regards,
-- 
~Randy

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