Unexpected IO-APIC messages

From: Dave Johnson (ddj@cascv.brown.edu)
Date: Mon Jul 16 2001 - 14:04:47 EST

When booting up 2.4.2-2smp (RH 7.1) on a new system here, the kernel
complains about the IO-APIC register contents, and asks that mail be
sent to linux-smp@vger.kernel.org.

It appears that the linux-smp list is defunct; at least there have been
no new messages archived on geocrawler since August 2000. It also
appears that the new IO APIC reg01.version of 0x20 was reported about
a year ago on the linux-smp list, and reg_01.__reserved_2 of 0x80 was
reported on this list around February 2001.

The relevant dmesg info from our machine follows:

testing the IO APIC.......................

IO APIC #2...... .... register #00: 02000000 ....... : physical APIC id: 02 .... register #01: 00178020 ....... : max redirection entries: 0017 ....... : IO APIC version: 0020 WARNING: unexpected IO-APIC, please mail to linux-smp@vger.kernel.org WARNING: unexpected IO-APIC, please mail to linux-smp@vger.kernel.org .... register #02: 00000000 ....... : arbitration: 00 ----

The APIC information from lspci -v follows: ---- 03:00.0 PIC: Intel Corporation 82806AA PCI64 Hub Advanced Programmable Interrupt Controller (rev 01) (prog-if 20 [IO(X)-APIC]) Subsystem: Intel Corporation 82806AA PCI64 Hub Advanced Programmable Int errupt Controller Flags: fast devsel Memory at fe400000 (32-bit, non-prefetchable) [disabled] [size=4K] ----

If anyone is planning to do anything about new IO-APIC versions and stuff, at least the mailing list address should be corrected.

If nobody cares until a bug comes along, perhaps the message should be changed to say "unrecognized" or "unknown" rather than unexpected, so the d**n users don't pee in their pants when they see the boot log scrolling by.

Or maybe just parse and print out the values and refer the user to linux/Documentation/i386/IO-APIC.txt (which also still refers to the linux-smp mailing list) for further information.


-- ddj

Dave Johnson ddj@cascv.brown.edu - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/

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